CCNA真题模拟-sem1_skillexam
思科认证CCNA认证试题和答案中文版

思科认证CCNA认证试题和答案中文版思科认证CCNA认证试题和答案中文版想要获得思科认证,首先要参加由思科推荐并授权的培训中心(Cisco Training Partner,简称CTP)所开设的培训课程。
完成学业后再到由全球考试机构Sylvan Prometric授权的.考试中心参加由思科指定的科目的认证考试。
通过指定的系列科目考试后,学员就可以获得相应分支系列等级的资格认证。
下面是店铺为大家搜集的相关试题,供大家参考练习。
16、路由器A串口0配置如下interface serial0link-protocol pppppp pap local-user huawei password simple quidwayip address 2.2.2.1 255.0.0.0路由器B串口及全局配置如下local-user huawei service-type ppp password simple quidway!interface serial0link-protocol pppppp authentication-mode papip address 2.2.2.2 255.0.0.0当两台路由器串口0相连时,两台路由器是否可以连接到对端()(A) 能(B) 不能答案:A17、关于千兆以太网,以下说法正确的是( )(A) IEEE802.3ab定义了千兆以太网(B) 在同一冲突域中,千兆以太网不允许中继器的互连(C) IEEE802.3z专门定义了千兆以太网在双绞线上的传输标准(D) 千兆以太网支持网络速率的自适应,可以与快速以太网自动协商传输速率答案:AB参考知识点:华为3com认证教材第一册3-8页18、高层的协议将数据传递到网络层后,形成( ),而后传送到数据链路层(A) 数据帧(B) 信元(C) 数据包(D) 数据段答案:C参考知识点:华为3com认证教材第一册1-20页19、在路由器上配置帧中继静态map必须指定( )参数(A) 本地的DLCI(B) 对端的DLCI(C) 本地的协议地址(D) 对端的协议地址答案:AD20、路由器的主要性能指标不包括( )(A) 延迟(B) 流通量(C) 帧丢失率(D) 语音数据压缩比答案:D【思科认证CCNA认证试题和答案中文版】。
思科认证CCNA认证试题与答案中文版

思科认证CCNA认证试题与答案中文版思科认证CCXA认证试题与答案中文版21、一个B类网络,有5位掩码加入缺省掩码用来划分子网,每个子网最多()台主机(A)510(B)512(C)1022(D)2046答案:D22、在路由器中,能用以下命令察看路由器的路由表()(A)arp-a(B)traceroute(C)routeprint(D)displayiprouting-table答案:D23、DHCP客户端是使用地址()来中请一个新的IP地址的(A)0. 0. 0. 0(B)10. 0. 0. 1(0127. 0. 0. 1(D)255. 255. 255. 255答案:D注释:255. 255. 255. 255是全网广播,DHCP客户端发送全网广播来查找DHCP服务器.24、下而有关NAT叙述正确的是()(A)NAT是英文“地址转换”的缩写,又称地址翻译(B)XAT用来实现私有地址与公用网络地址之间的转换(C)当内部网络的主机访问外部网络的时候,一定不需要NAT(D)地址转换的提出为解决IP地址紧张的问题提供了一个有效途径答案:ABD25、以下属于正确的主机的IP地址的是()(A)224. 0. 0.5(B)127. 32. 5. 62(0202. 112.5.0(D) 162. 111. 111. Ill答案:D注释:这个题目不是太严谨,应该加上子网掩码.A:224. 0. 0. 5是多播地址B: 127. 0.0. 0保留作为测试使用C:网络地址26、设置主接口由up转down后延迟30秒切换到备份接口,主接口由down转up后60秒钟切换回主接口的配置为()(A)standbytimer3060(B)standbytimer6030(C)standbytimerenable-delay60disable-delay30(D)standbytimerenable-delay30disable-delay60答案:D27、在一个以太网中,30台pc通过QuidwayR2501路由器s0 口连接internet, QuidwayR2501路由器配置如下:[Quidway-EthernetO] ipaddressl92. 168. 1. 1255. 255. 255. 0[Quidway-EthernetO]quit[Quidway]interfacesO[Quidway-SerialOJ ipaddress211. 136. 3. 6255. 255. 255. 252[Quidway-Serial0」link-protocolppp一台PC机默认网关为192. 168. 2.1,路由器会怎样处理发自这台PC 的数据包?(A)路由器会认为发自这一台PC的数据包不在同一网段,不转发数据包(B)路由器会自动修正这一台PC机的IP地址,转发数据包(C)路由器丢弃数据包,这时候需要重启路由器,路由器自动修正误配(D)路由器丢弃数据包,不做任何处理,需要重配PC网关为192. 168. 1. 1答案:D注释:PC的'默认网关要指向路由器的以太网口的IP地址.28、ISDNB信道速率是()(A)16kbps(B)64kbps(C)144kbps(D)2048kbps答案:B参考知识点:综合数字业务网(ISDN)由数字电话和数据传输服务两部分组成,一般由电话局提供这种服务。
CCNA综合试卷

CCNA集训队综合试卷一、选择题( 40分)1.交换机进行数据转发时,依据的是()。
(A)IP地址(B)MAC地址(C)主机名称(D)网络标识2.对交换机配置时,应将配置线缆插入()。
(A)Ethernet口(B)AUX口(C)Serial口(D)Console口3.下列哪个服务提供域名到IP地址的解析服务()。
A.DNS B.DHCP C.WWW D.SMTP4.哪种路由选择协议使用最短路径优先算法?( )A. 距离向量B. 链路状态C. 混合D. 以上都不对5.不支持可变长子网掩码的路由协议是( )A. RIP v1B. RIP v2C. OSPFD. IS-IS 6.Cisco的专用协议有( )A. RIPB. BGPC. EIGRPD. OSPF7.默认时,管理距离大于90的有( ) (本题多选)A. RIPB. IGRPC. OSPFD. EIGRP 8.路由协议存在路由自环问题的是( )A. RIPB. BGPC. OSPFD. IS-IS9.MAC地址与IP地址的长度分别是()。
(A)48位、48位(B)32位、32位(C)48位、32位(D)32位、48位10.以下网络互连设备中,属于物理层的设备是()。
(A)集线器(B)交换机(C)路由器(D)网关11.下列IP地址属于标准B类IP地址的是()(A)172.19.3.245/24 (B)190.168.12.7/16 (C)120.10.1.1/16 (D)10.0.0.1/16 12.以太网交换机组网中有环路出现也能正常工作,则是由于运行了()协议。
(A)801.z (B)802.3 (C)Trunk (D)Spanning Tree13.对IP地址为192.168.2.1的主机不停发送数据包的命令ping命令是()。
(A)ping 192.168.2.1 –n (B)ping 192.168.2.1 -i(C)ping 192.168.2.1 –t (D)ping 192.168.2.1 -a14.要查看交换机端口加入VLAN的情况,可以通过()命令来查看(A)show vlan (B)show running-config (C)show vlan.dat (D)show interface vlan 15.下列属于路由表的产生方式的是()。
最新CCNA认证考试真题

⽆忧考为⼤家收集整理了《最新CCNA认证考试真题》供⼤家参考,希望对⼤家有所帮助(1)TCP/IP Addressing and Protocol1: Your junior network administrator wants to know what the default subnet mask is for a Class C IP address. What do you tell him?A. 255.0.0.0B. 255.255.0.0C. 255.245.255.0D. 255.255.255.0E. 255.255.255.255 2: An application needs to have reliable, end-to-end connect-ivity. Which of the following protocols will give you reliable connectivity?A. TCPB. UDPC. IPD. ICMP 3: You are designing a network, which needs to support 55 users. You don't plan to extend the segment beyond the current number of users. Which subnet mask would best meet your needs?A. 255.255.0.0B. 255.255.255.0C. 255.255.255.192D. 255.255.255.160 4: You have added a new switch to your network. You want to manage it remotely, so you need to assign it an IP address. Your router that connects to the switch has an IP address of 172.16.12.33/27. Which of the following addresses can you assign to this switch?A. 172.16.12.33/28B. 172.16.12.32/27C. 172.16.12.33/27D. 172.16.12.34/27E. 172.16.12.35/28F. 172.16.12.38/28G. 172.16.12.63/27 5: The address 172.16.208.16/20 is a host address in which of the following subnets? A. 172.16.176.0–255.255.240.0B. 172.16.192.0–255.255.240.0C. 172.16.208.0–255.255.240.0D. 172.16.224.0–255.255.240.0 6: You are designing an IP address scheme for your brand new remote office. The vice president of IT calls to tell you that you will be in charge of the 192.168.1.64/26 subnetwork. This supplies you with a single subnetwork with 62 hosts. You need to have at least two subnets with 14 hosts in each subnet. What custom subnet mask should you use?A. 255.255.255.128B. 255.255.255.192C. 255.255.255.224D. 255.255.255.240E. 255.255.255.248 7: You have subnetted the 210.106.14.0 network with a /24 mask. Your boss at Acme, Inc. wants to know how many usable subnetworks and usable host addresses per subnet this would provide. What should you tell her?A. One network with 254 hostsB. Two networks with 128 hostsC. Four networks with 64 hostsD. Six networks with 30 hosts 8: Identify three valid host addresses in any subnet of the 201.168.27.0 network, assuming a fixed subnet mask of 255.255.255.240. (Choose three.)A. 201.168.27.33B. 201.168.27.112C. 201.168.27.119D. 201.168.27.126E. 201.168.27.175F. 201.168.27.208 9: What is the subnetwork address for a host with the IP address 201.100.5.68/28?A. 201.100.5.0B. 201.100.5.32C. 201.100.5.64D. 201.100.5.65E. 201.100.5.31F. 201.100.5.1 10: Which of the following protocols uses a three-way handshake mechanism to establish sessions?A. TCPB. IPC. UDPD. IPXE. Frame relay 11: Which of the following protocols is connection-oriented? A. TCPB. IPC. IPXD. Frame relay 12: You are using an application on your Windows 2000 client machines that provides error correction. You need a protocol to provide fast transport. Which protocol should your application use?A. TCPB. IPC. UDPD. SPXE. AppleTalk 13: When using TCP, after a session is open, the applications can adjust the number of segments they receive before sending an acknowledgment. This behavior is known as ______________.A. MTU adjustmentB. WindowingC. Flexible Send PathD. FCS 14: If the destination did not receive a segment, how will the TCP host know to resend the information?A. The ACK received will not include the segment number that was not received.B. The ACK received will include the segment number that was not received.C. The sending host will send a PACK to verify segment receipt.D. The destination host will send a YACK message back to the sending host. 15: You are planning on using a single network that supports 208 users. Which IP address class would you choose to be the most efficient?A. Class AB. Class BC. Class CD. Class DE. Class E 16: RFC 1918 defines the private IP address ranges. Which of the following IP addresses are considered part of these ranges? (Choose three.)A. 10.23.45.67B. 126.21.34.56C. 172.16.32.1D. 172.31.234.55E. 192.169.4.5 17: A new network is being designed for your company, Acme, Inc. If you use a Class C IP network, which subnet mask will provide one usable subnet per department while allowing enough usable host addresses for each department specified in the table?Department Number of Users Corporate 7 Customer Support 15 Financial 13 HR 7 Engineering 16 A. 255.255.255.0B. 255.255.255.192C. 255.255.255.224D. 255.255.255.240E. 255.255.255.248 18: Which of these protocols provides data transport, relying on the error correction capabilities of the application itself?A. UDPB. TCPC. SNMPD. ICMP 19: Which of the following are used by TCP to ensure reliable delivery of data? (Choose two.)A. MAC address resolutionB. Sequence numbersC. AcknowledgmentsD. PingE. Routing updates 20: You discover that you are able to adjust the window size of the TCP segment. You increase the window size to test the results. What will you observe happening on your network?A. Increased throughputB. Decreased throughputC. Increased latencyD. Decreased reliability21: Your organization is using the 192.168.1.0/24 address space. You need 28 subnets. What subnet mask would you use to create these subnets?A. 255.255.255.0B. 255.255.255.128C. 255.255.255.192D. 255.255.255.224E. 255.255.255.240F. 255.255.255.248 22: Which of the following protocols maps IP addresses to MAC addresses for connectivity to occur between two hosts?A. ARPB. RARPC. SLARPD. DHCP 23: Your junior network administrator cannot seem to ping a host in another network and asks you why it isn't working. Which of the following is not an answer that you would give him?A. The host's default gateway is down.B. The destination host is not powered on.C. The IP address of the router interface is incorrect.D. The IP address of the switch to which the destination host connects is incorrect.E. The host is in a different subnet. 24: Which of the following classes of IP addresses is utilized for multicasting?A. Class AB. Class BC. Class CD. Class D 25: You give your IT department a spreadsheet of IP addresses and their subnets. You receive a call from one of the junior techs asking what the /26 means next to the IP addresses. You tell her: A. It represents the number of hosts possible on that subnetwork.B. It represents the number of subnetworks that are being used.C. It represents the class of IP address being used.D. It represents the number of bits in the subnet mask that are 1. 26: You are given an IP network of 192.168.5.0 and told that you need to separate this network into subnetworks that can support a maximum of 16 hosts per subnet. This will help alleviate congestion on the network. What subnet mask can you use to create the subnets necessary to meet the given criteria?A. 255.0.0.0B. 255.255.0.0C. 255.255.255.0D. 255.255.255.224E. 255.255.255.240 27: Which of the following would a Class A network be assigned to?A. Government agencyB. Small-to-medium sized corporationD. An individual 28: A client has the IP address 192.168.5.98/27. Which of the following addresses are on the same subnet as this host? (Choose two.)A. 192.168.5.95B. 192.168.5.100C. 192.168.5.128D. 192.168.5.110 29: Which of the following IP addresses is not a public IP address that can be routed over the Internet?A. 2.3.4.5B. 11.12.13.14C. 165.23.224.2D. 172.31.45.34E. 203.33.45.22 30: You are given a Class B network. What is the default subnet mask assigned to the Class B network?A. 255.255.255.255B. 255.255.0.0C. 255.224.0.0D. 0.0.0.0 31: You are troubleshooting your router's interfaces. For some reason, the Ethernet interface will not accept the IP address of 192.168.5.95/27 that you've assigned. Which of the following explains the router's refusal to take the IP address?A. Class C addresses cannot be assigned to Ethernet interfaces.B. The /27 is an invalid mask.C. It is a broadcast address.D. It is a public IP address.E. It is a private IP address. 32: You are a network technician at Acme, Inc. You are required to divide the 172.12.0.0 network into subnets. Each subnet must have the capacity of 458 IP addresses. Also, according to the requirements, you must provide the maximum number of subnets. Which subnet mask should you use?A. 255.255.255.254B. 255.255.254.0C. 255.255.240.254D. 255.255.0.0 33: What is the subnetwork and broadcast IP address of 192.168.2.37 with the subnet mask of255.255.255.248?A. 192.168.2.24/192.168.2.31B. 192.168.2.32/192.168.2.39C. 192.168.2.40/192.168.2.47D. 192.168.2.48/192.168.2.55E. 192.168.2.56/192.168.2.63 34: One of your co-workers at Acme, Inc., needs to convert the binary number 11011010 into a decimal. What is the decimal equivalent?A. 218B. 219C. 220E. 222 35: One of your co-workers at Acme, Inc., needs to convert the binary number 01011010 into a decimal. What is the decimal equivalent?A. 75B. 83C. 90D. 97 36: One of your co-workers at Acme, Inc. , n e e d s t o c o n v e r t t h e b i n a r y n u m b e r 1 1 0 1 0 1 1 0 i n t o a d e ci m a l . W h a t i s t h e d e c i m a l e q u i v a l e n t ? / p > p b d s f i d = " 2 1 0 " > A . 1 9 8 / p > p b d s f i d = " 2 1 1 " > B . 2 14 / p > p b d s f i d = " 2 1 2 " > C . 25 2 / p > p b d s f i d = " 2 1 3 " > D . 2 5 5 3 7 : O n e o f y o u r c o - w o r k e r s a t A c m e , I n c . , n e e d s t o c o n v e r t t h e b i n a r y n u m b e r 1 0 1 1 0 1 1 0 i n t o a d e c i m a l . W h a t i s t h e d e c i m a l e q u i v a l e n t ? / p > p b d s f i d = " 2 1 4 " > A . 1 8 2 / p > p b d s f i d = " 2 1 5 " > B . 1 9 2 / p > p b d s f i d = " 2 16 " > C . 2 0 2 / p > p b d s f i d = " 2 17 " > D . 2 1 2 38 : Y o u a r e c o n f i g u r i n g a s u b n e t f o r t h e A c m e , I n c . , b r a n c h o f f i c e i n B e i j i n g . Y o u n e e d t o a s s i g n I P a d d r e s s e s t o h o s t s i n t h i s s u b n e t . Y o u h a v e b e e n g i v e n t h e s u b n e t m a s k o f 2 5 5 . 2 5 5 . 2 5 5 . 2 2 4 . W h i c h o f t h e s e I P a d d r e s s e s w o u l d b e v a l i d ? ( C h o o s e t h r e e . ) / p > p b d s f i d = " 2 1 8 " > A . 1 5 . 2 3 4 . 1 1 8 . 6 3 / p > p b d s f i d = " 2 19 " > B . 9 2 . 1 1 . 1 7 8 . 9 3 / p > p b d s f i d = " 2 2 0 " > C . 1 3 4 . 1 7 8 . 1 8 . 5 6 / p > p b d s f i d = " 2 2 1 " > D . 1 9 2 . 1 6 8 . 1 6 . 8 7 / p > p b d s f i d = " 2 2 2 " > E . 2 0 1 . 4 5 . 1 1 6 . 1 5 9 / p > p b d s f i d = " 2 2 3 " > F . 2 1 7 . 6 3 . 1 2 . 1 9 2 3 9: Y o u a r e a n e t w o r k t e c h n i c i a n a t A c m e , I n c . Y o u h a v e s u b n e t t e d t h e 2 0 8 . 9 8 . 1 1 2 . 0 n e t w o r k w i t h a / 2 8 m a s k . Y o u r b o s s a s k s y o u h o w m a n y u s a b l e s u b n e t w o r k s a n d u s a b l e h o s t a d d r e s s e s p e r s u b n e t t h i s w i l l p r o v id e . W h a t s h o u l d y o u t e l l h e r , a s s u m i n g y o u r r o u t e r i s u s i n g i p s u b n e t - z e r o ? / p > p b d s f i d = " 22 4 " > A . 6 2 n e t w o r k s a n d 2 h o s t s / p > p b d s f i d = " 2 2 5 " > B . 6 n e t w o r k s a n d3 0 h o s t s / p > p b d s f i d = " 2 2 6 " > C . 8 n e t w o r k s a n d 3 2 h o s t s / p > p b d s f i d = " 2 2 7 " > D . 1 6 n e t w o r k s a n d 1 6 h o s t s / p > p b d s f i d = " 2 2 8 " > E . 1 6 n e t w o r k s a n d 14 h o s t s 4 0 : W h a t i s a d i s a d v a n t a g e o f u s i n g a c o n n e c t i o n -o r i e n t e d p r o t o c o l s u c h a s T C P ? / p > p b d s f i d = " 2 2 9 " > A . P a c k e t a c k n o w l e d g m e n t m i g h t a d d o v e r h e a d . / p > p b d s f i d = " 2 3 0 " > B . P a c k e t s a r e n o t t a g g e d w i t h s e q u e n c e n u m b e r s . / p > p b d s f i d = " 2 3 1 " > C . L o s s o r d u p l i c a t i o n o f d a t a p a c k e t s i s m o r e l i k e l y t o o c c u r . / p > p b d s f i d = " 2 32 " > D . T h e a p p l i c a t i o n l a y e r m u s t a s s u m e r e s p o n s i b i l i t y f o r t h e c o r r e c t s e q u e n c i n g o f t h ed a t a p a c ke t s . 4 1 : Y o u a r e a n e t w o r k t e c h n i c i a n a t A c m e , I n c . Y o u h a v e s u b n e t t e d t h e 1 9 2 . 16 8 .7 2 . 0 n e t w o r k w i t h a / 3 0 m a s k f o r c o n n e c t i o n s b e t w e e n y o u r r o u t e r s . Y o u r b o s s a s k s y o uh o w m a n y u s a b l e s u b n e t w o r k s a n d u s a b l e h o s t a d d r e s s e s p e r s u b n e t t h i s w i l l p r o v i d e . W h a t s h o u l d y o u t e l l h e r , a s s u m i n g y o u r r o u t e r c a n n o t u s e i p s u b n e t - z e r o ? / p > p b d s f i d = " 2 3 3 " > A . 6 2 n e t w o r k s a n d 2 h o s t s / p > p b d s f i d = " 2 3 4 " > B . 6 n e t w o r k s a n d 3 0 h o s t s / p > p b d s f i d = " 23 5 " > C . 8 n e t w o r k s a n d 3 2 h o s t s / p > p b d s f i d = " 2 3 6 " > D . 1 6 n e t w o r k s a n d 1 6 h o s t s / p > p b d s f id = " 2 3 7 " > E . 1 4 ne t w o r k s a n d 1 4 h o s t s 4 2 : W h i c h of t h e f o l l o w i ng I P a d d r e s s e s a r e c o n s i d e re d " n e t w o r k " a d d r e s s e s w i t h a / 2 6 p r ef i x ? ( C h o o s e t w o . ) / p > p b d s f i d = " 2 3 8 " > A . 1 6 5 . 2 0 3 . 2 . 0 / p > p b d s f i d = " 2 3 9 " > B . 1 6 5 . 2 0 3 . 5 . 1 9 2 / p > p b d s f i d = " 2 4 0 " > C . 1 6 5 . 2 0 3 . 6 . 6 3 / p > p b d s f i d = " 2 4 1 " > D . 1 6 5 . 2 0 3 . 6 . 1 9 1 / p > p b d s f i d = " 2 4 2 " > E . 1 6 5 . 2 0 3 . 8 . 2 5 5 4 3 : I d e n t i f y t h r e e v a l i d h o s t s i n a n y s u b n e t o f 1 9 2 . 1 6 8 . 3 2 . 0 , a s s u m i ng th e s u b n e t m a s k u s e di s 2 5 5 . 2 5 5 . 2 5 5 . 2 4 0 . (C h o o s e t h r e e . ) / p > p b d s f i d = " 2 4 3 " > A . 1 9 2 . 1 6 8 . 3 2 . 3 3 / p > p b d s f i d = " 2 4 4 " > B . 1 9 2 . 1 6 8 . 3 2 .1 12 / p > p b d s f i d = " 2 4 5 " > C . 1 9 2 . 1 6 8 .3 2 . 1 1 9 / p > p b d s f i d = " 24 6 " > D . 1 9 2 . 1 6 8 . 3 2 . 1 2 6 / p > p bd s f i d = " 2 4 7 " > E . 1 9 2 . 1 6 8 . 3 2 . 1 7 5 / p > p b d s f i d = " 2 4 8 " > F . 1 9 2 . 1 6 8 . 3 2 . 2 0 8 4 4 : A C l a s s C ne t w o r k a d d r e s s h a s b e e n s u b n e t t e d w i t h a / 2 7 m a s k . W h i c h of t h e f o l l o w i ng a d d r e s s e s i s a b r oa d c a s t a d d r e s s f o r o n e o f t h e r e s u l t i n g s ub n e t s ? / p > p b d s f i d = " 2 4 9 " > A . 1 9 8 . 5 7 . 7 8 . 3 3 / p > pb d s f i d = " 2 5 0 " > B . 1 9 8 . 5 7 . 7 8 . 6 4 / p > p b d s f i d = " 2 5 1 " > C . 1 9 8 . 5 7 . 7 8 . 9 7 / p > p b d s f i d = " 2 5 2 " >D . 1 9 8 . 5 7 . 7 8 . 9 7 / p > p b d s f i d = " 2 5 3 " >E . 1 9 8 . 5 7 . 7 8 . 1 5 9 / p > p b d s f i d = " 2 5 4 " >F . 1 9 8 . 5 7 . 7 8 .2 5 4 4 5 : W h a t i s t h e s u b n e t w o r k a d d r e s s f o r a h o s t w i t h I P a d d r e s s 1 6 5 . 1 0 0 . 5 . 6 8 / 2 8 ? / p > p bd s f i d = " 2 5 5 " > A . 1 6 5 . 1 0 0 . 5 . 0 / p > p b d s f i d = " 2 5 6 " > B . 1 6 5 . 1 0 0 . 5 . 3 2 / p > p b d s f i d = " 2 5 7 " > C .1 6 5 . 1 0 0 . 5 . 6 4 / p > p b d s f i d = "2 5 8 " > D . 1 6 5 . 1 0 0 . 5 . 6 5 / p > p b d s f i d = " 2 5 9 " > E . 1 6 5 . 1 0 0 . 5 .3 1 / p > p b d s f i d = " 2 6 0 " > F . 1 6 5 . 1 0 0 . 5 . 14 6 : Y o u r b o s s w a n t s t o k n o w w h a t T C P s t a n d s f o r . W h a t d o y o u t e l l h i m ? / p > p b d s f i d = " 2 6 1 " > A . T r a n s m i s s i o n C h e c k P r o t o c o l / p > p b d s f i d = " 2 6 2 " > B . T r a n s p o r t C h e c k P r o t o c o l / p > p b d s f i d = " 2 6 3 " > C . T r a n s m i s s i o n C o n t r o l P r o t o c o l / p > p b d s f i d = " 2 6 4 " > D . T r a n s p o r t C o n t r o l P r o t o c o l 4 7 : Y o u r b o s s w a n t s t o k n o w w h a t U D P s t a n d s f o r . W h a t d o y o u t e l l h i m ? / p > p b d s f i d = " 2 65 " > A . U n r e l i a b l e D a t a P r o t o c o l / p > p b d s f i d = " 26 6 " > B . U n r e l i a b l e D a t a P r o g r a m / p > p b d s f i d = " 2 67 " > C . U s e r - D e f i n e d P r o t o c o l / p > p b d s f i d = "2 6 8 " > D . U s e r D a t a g r a m P r o t o c o l 4 8 : W h i c h o f t h e f o l l o w i n g s t a t e m e n t s a c c u r a t e l y d e s c r ib e s U D P ? / p > p b d s f i d = " 2 6 9 " > A . U D Pc o p i e s f i l e s b e t w e e n a c o m p u t e r a nd a s y s te m r u n n i n g r s h d , t h e r e m o t e s h e l l s e r v i c e ( d a e m o n ) . / p > p b d sf i d = " 2 7 0 " > B . U D P i s a m e m b e r o f t h e T C P / I P s u i t e o f p r o t o c o l s t h a tg o v e r n s th e e x c h a n g e o f e l e c t r o ni c m a i l b e t w e e n m e s s a g e t ra n s f e r a g e n t s . / p > pb d s f i d = " 2 7 1 " > C . U D P i s a m e m b e r o f t h e T C P / I P s u i t e o f p r o t oc o l s a nd i s u se d t o c o p yf i l e s b e t w e e n t w o c o m p u t e r s o n t h e I n t e r n e t . B o t h c o m p u t e r s m u s t s u p p o r t t h e i r r e s p e c t i v e r o l e s : o n e m u s t b e a c l i e n t , a n d t h e o t h e r a s e r v e r . / p > p b d s f i d = " 2 7 2 " > D . U D P i s a T C P c o m p l e m e n t t h a t o f f e r s a c o n n e c t i o n l e s s d a t ag r a m s e r v i c e g u a r a n t e e i n g n e i th e r d e li v e r y n o r c o r r e c t s e q u e n c i n g o f d e l i v e r e d p a c k e t s ( m u c h l i k e I P ) . 4 9 : W h i c h o f t h e f o l l o w i n g h o s t a d d r e s s e s a r e m e m b e r s o f n e t w o r k s t h a t c a n b e r o u t e d a c r o s s t h e p u b l i c I n t e r n e t ? ( C h o o s e t h r e e . ) / p > p b d s f i d = " 2 7 3 " > A . 1 0 . 2 0 . 1 2 . 6 4 / p > p b d s f i d = " 2 7 4 " > B . 1 7 2 . 1 6 . 32 . 1 2 9 / p > p b d s f i d = " 2 7 5 " > C . 1 7 2 . 6 4 .3 2 . 34 / p > p b d s f i d = " 2 7 6 " > D . 1 9 2 . 1 6 8 . 2 3 . 25 2 / p > p bd s f i d = " 2 7 7 " > E . 1 9 6 . 1 0 4 . 1 2 . 9 5 / p > p b d s f i d = " 2 7 8 " > F . 2 1 4 . 1 9 2 . 4 8 . 2 5 4 5 0 : Y o u a re c o n n e c t i n g y o u r S e r i a l 0 / 1 i n t e rf a c e t o t h e I n t e r n e t . W h i c h o f t h e f o l l o w i ng n e e d t o b e d o n e f o r th e c o n n e c ti o n t o w o r k ? ( C h o o s e t w o . ) / p > p b d s f i d = " 2 7 9 " > A . A s s i g n a p u b l i c I P a d d r e s s . / p > pb d s f i d = " 2 8 0 " > B . U s e t h e s h u t d o w nc o m m a nd . / p > p b d s f i d = " 2 8 1 " > C . U se t h e n o s h u t d o w nc o m m a nd . / p > p b d s f i d = " 2 8 2 " > D . M a ke s u r e t h e i n t e rf a c e i s r u n n i ng i n f u l l - d u p l e x . / p >。
完整版CCNA测试题库及答案

完整版CCNA测试题库及答案描述载波侦听多路由访问/冲突检测(CSMA/CD)的工作原理。
CSMA/CD是一种帮助设备均衡共享带宽的协议,可避免两台设备同时在网络介质上传输数据。
虽然他不能消除冲突,但有助于极大的减少冲突,进而避免重传,从而提高所的设备的数据传输效率。
区分半双工和全双工通信。
并指出两种方法的需求。
与半双工以太网使用一对导线不同,全双工以太网使用两队导线,全双工使用不同的导线来消除冲突,从而允许同时发送和接收数据,而半双工可接收或发送数据,但不能同时接收和发送数据,且仍会出现冲突。
要使用全双工,电缆两端的设备都必须支持全双工,并配置成一全双模式运行。
描述MAC地址的组成部分以及各部分包含的信息。
MAC(硬件)地址时一种使用十六进制表示的地址,长48位(6B)。
其中前24位(3B)称为OUI(Organizationally Unique Idebtifier,组织唯一表示符),有IEEE分配给NIC制造商;余下的部分呢唯一地标识了NIC识别十进制数对应的二进制值和十六进制值。
用这三种格式之一表示的任何数字都可以转换为其他两种格式,能够执行这种转换对理解IP地址和子网划分至关重要。
识别以太网帧中与数据链路层相关的字段。
在以太网中,与数据链路层相关的字段包括前导码,帧其实位置分隔符,目标MAC地址,源MAC地址,长度或者类型以及帧校验序列。
识别以太网布线相关的IEEE标准。
这些标准描述了各种电缆类型的功能和物理特征,包括(但不限于)10Base2、10Base5和10BaseT。
区分以太网电缆类型及其用途。
以太网电缆分3种:直通电缆,用于将PC或路由器的以太网接口连接到集线器或交换机;交叉电缆。
用于将集线器连接到集线器,集线器连接到交换机,交换机连接到交换机以及PC连接到PC;反转电缆,用于PC和路由器或交换机之间建立控制台连接。
描述数据封装过程及其在分组创建中的作用。
数据封装指的是在OSI模型各层给数据添加信息的过程,也成为分组创建。
思科CCNA学习试题答案!!!

思科CCNA学习试题答案CCNA课程测试一、单项选择题:1、介质100BaseT的最大传输距离是:( )A: 10m B:100m C:1000m D:500m2、路由器下,由一般用户模式进入特权用户模式的命令是:()A:enable B:config C: interface D:router3、哪个命令可以成功测试网络:( )A: Router> ping 192.5.5.0B: Router# ping 192.5.5.30C: Router> ping 192.5.5.256D: Router# ping 192.5.5.2554、介质工作在OSI的哪一层()A:物理层 B:数据链路层 C:网络层 D:传输层5、100baseT的速率是( )Mbit/sA: 1 B:10 C:100 D:10006、在启用IGRP协议时,所需要的参数是:( )A:网络掩码 B:子网号C:自治系统号 D:跳数7、基本IP访问权限表的表号范围是:( )A: 1—100 B:1-99 C:100-199 D:800-8998、查看路由表的命令是:( )A:show interface B:show run C:show ip route D:show table9、工作在OSI第三层的设备是:( )A:网卡B:路由器 C: 交换机 D:集线器10、OSI第二层数据封装完成后的名称是:( )A:比特 B: 包C:帧 D:段11、为了禁止网络210.93.105.0 ftp到网络223.8.151.0,允许其他信息传输,则能实现该功能的选项是:( )A:access-list 1 deny 210.93.105.0.0.0.0.0.0B:access-list 100 deny tcp 210.93.105.0 0.0.0.255 223.8.151.00.0.0.255 eq ftpC:access-list 100 permit ip any anyD:access-list 100 deny tcp 210.93.105.0 0.0.0.255 223.8.151.0 0.0.0.255 eq ftpaccess-list 100 permit ip any any12、路由器下“特权用户模式”的标识符是:( )A: > B:! C:# D: (config-if)#13、把指定端口添加到VLAN的命令是:( )A: vlan B: vlan-membership C: vtp D:switchport14、交换机工作在OSI七层模型的哪一层( )A:物理层B:数据链路层C:网络层 D:传输层15、在OSI七层模型中,介质工作在哪一层( )A:传输层 B:会话层C:物理层 D:应用层16、交换机转发数据到目的地依靠( )A:路由表B:MAC地址表 C:访问权限表 D:静态列表17、为了使配置私有IP的设备能够访问互联网,应采用的技术是( )?A:NAT B:VLAN C:ACCESS-LIST D:DDR18、VLAN主干协议VTP的默认工作模式是( )A:服务器模式B:客户端模式C:透明模式D:以上三者都不是19、路由器的配置文件startup-config存放在( )里A:RAM B:ROM C:FLASH D:NVRAM20、配置路由器特权用户“加密密码”的命令是:( )A:password B:enable password C:enable secretD:passwd21、某网络中,拟设计10子网,每个子网中放有14台设备,用IP 地址段为199.41.10.X ,请问符合此种规划的子网掩码是( ) A: 255.255.255.0 B:255.255.240.0C: 255.255.255.240 D:255.248.0.022、在路由表中到达同一网络的路由有:静态路由、RIP路由、IGRP 路由,OSPF路由,则路由器会选用哪条路由传输数据:( ) A:静态路由 B: RIP路由 C:IGRP路由 D:OSPF路由23、扩展IP访问权限表的表号范围是:( )A: 1—100 B:1-99 C:100-199 D:800-89924、把访问权限表应用到路由器端口的命令是:( )A: permit access-list 101 out B: ip access-group 101 out C: apply access-list 101 out D: access-class 101 out 25、混合型协议既具有“距离矢量路由协议”的特性,又具有“链路状态路由协议”的特性,下列协议中属于混合型协议的是:( ) A: RIP B: OSPF C:EIGRP D: IGRP26、在路由器上,命令show access-list的功能是():A:显示访问控制列表内容 B:显示路由表内容C:显示端口配置信息 D:显示活动配置文件27、RIP路由协议认为“网络不可到达”的跳数是:( )A: 8 B:16 C:24 D:10028、查看E0端口配置信息的命令是:( )A:show access-list B:show ip routeC:show version D:show interface e029、配置路由器时,封装PPP协议的命令是:( )A:encap ppp B:ppp C: group ppp D: int ppp30、路由器上“水平分割”的功能是:( )A:分离端口B:阻止路由环路C:简化配置D:方便故障处理31、OSI七层模型中,“包”是哪一层数据封装的名称()A:物理层 B:数据链路层C:网络层 D:传输层32、OSI七层模型中,“段”是哪一层数据封装的名称()A:物理层 B:数据链路层 C:网络层 D:传输层33、备份路由器IOS的命令是:( )A: copy flash tftpB: copy running-config tftpC: copy IOS tftpD: copy startup-config tftp34、PPP工作在OSI的哪一层()A:物理层B:数据链路层 C:网络层 D:传输层35、FTP工作在OSI哪一层()A:会话层 B:表示层 C:传输层D:应用层36、TELNET工作在OSI哪一层()A:会话层 B:表示层 C:传输层D:应用层37、SMTP工作在OSI哪一层()A:会话层 B:表示层 C:传输层D:应用层38、IP地址为:192.168.50.70,掩码为:255.255.255.248,则该IP地址所在子网的子网号为()A:192.168.50.32 B:192.168.80.64C:192.168.50.96 D:192.168.50.7139、IP地址为:192.168.50.70,掩码为:255.255.255.248,则该IP地址所在子网的广播地址为()A:192.168.50.32 B:192.168.80.64C:192.168.50.96 D:192.168.50.7140、IP地址为:192.168.50.70,掩码为:255.255.255.248,则该IP地址所在子网的子网有效IP为()A:192.168.50.33---192.168.50.39B:192.168.50.41---192.168.50.50C:192.168.50.65---192.168.50.70D:192.168.50.66---192.168.50.7541、IP地址为:192.168.50.70,掩码为:255.255.255.248,则该IP和掩码结合,共划分了多少个子网(不包括全0子网和全1子网)()A: 8 B:30 C:6 D:1442、IP地址为:192.168.50.70,掩码为:255.255.255.248,则该IP和掩码结合划分子网时,每个子网的容量为()A:8 B:4 C:12 D:643、网络172.12.0.0需要划分子网,要求每个子网中有效IP数为458个,为了保证子网数最大,则掩码应为()A:255.255.255.0 B:255.255.254.0 C:255.255.0.0D:255.255.248.044、哪一个命令可以设置路由器特权用户的“明文密码”()A:enable password B:password C:enable secretD: secret45、RIP协议的管理距离是()A:100 B:110 C:120 D:15046、下列路由协议中,属于链路状态路由协议的是()A:RIP B:EIGRP C:IGRP D:OSPF47、默认情况下,RIP定期发送路由更新的时间是()A:15S B:30S C:60S D:90S48、如果网络中的路由器都是cisco路由器,则优先选择哪一个路由协议()A:RIP B:EIGRP C:IGRP D:OSPF49、下列对RIP的配置中,合法的命令是()A: router rip 100network 10.12.0.0B: router rip 100network 10.0.0.0C: router ripnetwork 10.12.0.0D: router rip 100network 10.0.0.050、为了查看路由器的E0端口上,是否挂接了访问权限表,应该使用的命令是()A:show access-list B:show interface e0C: show ip interface e0 D:show e051、关于帧中继的说法,正确的是()A:速率最大为1Mbit/s B: 不提供差错校验功能C:可以偷占带宽 D:数据传输质量高于DDN52、关于PPP和HDLC的说法中,错误的是()A:PPP是通用协议,HDLC是CISCO私有协议B:PPP有验证功能,HDLC无验证功能C:PPP效率低,HDLC效率高D:在配置ISDN时,广域网协议不能封装成PPP,但可以封装成HDLC 53、对交换机的描述,正确的是()A:单广播域,单冲突域的设备B:单广播域,多冲突域的设备C:多广播域,单冲突域的设备D:多广播域,多冲突域的设备54、对路由器的描述,正确的是()A:单广播域,单冲突域的设备B:单广播域,多冲突域的设备C:多广播域,单冲突域的设备D:多广播域,多冲突域的设备55、交换机上VLAN的功能描述中,正确的是()A:可以减少广播域的个数B:可以减少广播对网络性能的影响C: 可以减少冲突域的个数D: 可以减小冲突域的容量56、两个VLAN之间要想通信,应该使用的设备是()A:集线器 B:二层交换机C:路由器 D:PC机57、要把交换机的配置文件保存到tftp服务器,应使用的命令为()A:copy ios tftp B:copy running-config tftpC: copy flash tftp D:copy config tftp58、命令“ping 127.0.0.1”的功能是()A:测试网卡是否正常 B:测试网关是否正常C:测试TCP/IP协议是否正常 D:测试介质是否正常59、路由器上的命令“show version”的功能是()A:显示版本信息 B:显示端口配置信息 C:显示路由表D:显示路由协议信息60、路由器上激活端口的命令是()A:shutdown B:no shutdown C: up D:no up61、某台PC,能ping通路由器,但不能telnet到路由器,可能的原因是(D )A:PC的IP地址设置错误 B:路由器端口IP设置错误C:路由器端口处于关闭状态D:telnet密码未设置62、OSI七层模型中,网络层的数据封装名称为()A:比特 B:帧C:包 D:段63、OSI七层模型中,物理层的数据封装名称为()A:比特 B:帧 C:包 D:段64、OSI七层模型中,数据链路层的数据封装名称为()A:比特B:帧 C:包 D:段65、OSI七层模型中,传输层的数据封装名称为()A:比特 B:帧 C:包D:段66、帧中继环境下,为了区分虚电路,应该使用的地址是()A:IP地址 B:MAC地址 C:DLCI D:IPX地址67、路由器“路由模式”的提示符号是()A: # B: (config)# C:(config-if)# D:(config-router)# 68、EIGRP 的管理距离()A:90 B:100 C:110 D:12069、RIP协议负载均衡的路径数量为()A:无限制B:最多4条C:最多5条D:最多6条70、下面有关交换机的描述中,正确的是()A:所有交换机都支持VLAN功能B:交换机端口数量最多为48口C:交换机独占带宽D:交换机端口的最大速率为100Mbit/s71、为了阻止交换机环路,交换机上所采用的技术为()A:水平分割B:生成树协议C:触发更新D:地址学习72、帧中继环境中,CIR的含义是()A:提高线路速率B:保证线路速率C:降低线路速率D:配置线路速率73、路由器上端口fa0/0,其最大传输速率是()Mbit/sA:128 B: 10 C:100 D: 100074、帧中继环境中,在物理端口上,建立子接口的命令是()A:create B:interface C:encapsulation D:ip address 75、路由器上,命令“show int s0”的显示结果为:Serial0 is up , line protocol is down出现该结果的可能原因是()A:端口处于关闭状态 B:物理端口被烧毁C:两端设备协议不一致 D:路由表中无路由76、如果把路由器的某个端口的IP配置为:192.168.10.64,掩码配置为:255.255.255.248,则该端口()A:能和其他设备正常通信B:会变成“administratively down”状态C:端口被烧毁D:出现错误提示,配置命令执行失败77、网关的功能()A:过滤数据包B:不同网段通信 C:校验数据帧D:把数据封装成“段”78、能够分配给设备的IP,应该是()A:网络有效IP B:网络号 C:网络广播地址 D:任意IP 79、路由器“全局模式”的提示符为()A: > B: # C: (config)# D: (config-router)#80、路由器当前的模式为“端口模式”,要退回到“特权模式”,应该使用的快捷键为()A:ctrl+b B: ctrl+z C:ctrl+c D:ctrl+p81、下列命令中,无法正确执行的是()A:Router(config)#show runB: Router#ping 127.0.0.1C: Router(config)#hostname ciscoD: Router#reload82、路由器上,设置端口速率的命令是()A:clock rate B:bandwidth C:set D:encap83、路由器上,清空路由表的命令是()A:clear ip B:delete ip route C:delete routeD: clear ip route *84、路由表中,某条路由的“路由代码为D”,则表明该路由为()A:直连路由 B:静态路由 C:IGRP路由 D:EIGRP路由85、两台路由器直连到一起,应该使用的线缆为()A:交叉线缆B:直通线缆C:反转线缆D:任意线缆86、通过路由器的“配置端口console”对路由器进行配置,应该使用的线缆为()A:交叉线缆B:直通线缆C:反转线缆D:任意线缆87、下面对Cisco2621路由器和Cisco2501路由器描述中,错误的是()A:Cisco2621路由器的可扩展性优于Cisco2501路由器B:Cisco2621是模块化路由器C:Cisco2501上提供一个100Mbit/s的快速以太网端口D:Cisco2501是固定端口的路由器88、为了连接“帧中继”线路,网络中的路由器需要提供的端口类型为()A:FastEthernet B:Serial C:BRI D:Ethernet89、路由器“特权模式”的提示符是:()A:> B:# C:(config)# D: (config-if)#90、下列关于路由器和交换机的描述中,错误的是()A:路由器可以用来连接internetB:二层交换机可以用来实现“异地网络”互连C:路由器可以用来做路径选择D:交换机可以转发广播二、多项选择题:正确答案的个数在每题的题后括号中有说明91、在路由器上,可以使用的命令有:( ) [选3个]A:ping B:show interfaces C:show ip route D:ipconfig E:wincfg92、在配置帧中继子接口时,在物理接口上应该配置的内容是:( )[选3个]A:配置IP地址B:封装帧中继协议C:指定子接口类型D:设定子接口 E:配置密码93、请选出交换机处理帧的三种模式:( )[选3个]A:直通模式 B:存储转发模式 C:侦测模式 D:分段模式E:阻塞模式94、对于IP为199.41.27.0,子网掩码为255.255.255.240,则该IP地址和子网掩码相作用会得到一系列IP,从下列选项中选出属于“有效IP”的选项:( ) [选3个]A:199.141.27.33 B:199.141.27.112 C:199.141.27.119D:199.141.27.126 E:199.141.27.175 F:199.141.27.208 95、属于私有IP段的是( )[选3个]A:10.0.0.0-10.255.255.255B:172.16.0.0-172.31.255.255 C:202.110.100.0-202.110.100.255D:192.168.0.0-192.168.255.255E:126.0.0.0-126.255.255.25596、下列哪一设备工作时,要用到OSI的七个层(一层到七层)()[选3个]A:PC B:网管机 C:WEB服务器 D:交换机 E:路由器97、网络中经常使用DDN服务,请选出DDN的优点()[选3个] A:传输质量高 B:接入方式灵活 C:偷占带宽D:使用虚电路E:专用线路98、网络中经常使用“帧中继”服务,请选出帧中继的优点()[选3个]A:偷占带宽B:提供拥塞管理机制C:可以使用任意广域网协议D:灵活的接入方式99、默认情况下,IGRP衡量路径好坏时,考虑的因素为()[选2个]A:带宽 B:可靠性 C:最大传输单元D:延时100、交换机的三大功能为()[选3个]A:地址学习 B:转发过滤 C:消除回路 D:发送数据包。
CCNA考试题库中英文翻译版及答案
CCNA考试题库中英文翻译版及答案1[1]1. What are two reasons that a network administrator would use access lists? (Choose two.)1.出于哪两种理由,网络管理员会使用访问列表?A. to control vty access into a routerA.控制通过VTY访问路由器B. to control broadcast traffic through a routerB.控制广播流量穿越路由器2.一个默认的帧中继WAN被分类为哪种物理网络类型?A. point-to-pointA.点到点B. broadcast multi-accessB.广播多路访问C. nonbroadcast multi-accessC.非广播多路访问D. nonbroadcast multipointD.非广播多点E. broadcast point-to-multipointE.广播点到多点Answer: C3. A single 802.11g access point has been configured and installed in the center of a squarA few wireless users are experiencing slow performance and drops while most users are oat peak efficiency. What are three likely causes of this problem? (Choose three.)3.一个802.11接入点被部署在一个方形办公室的中央,当大多数用户在大流量传输数一些无线用户发现无线网络变得缓慢和出现丢包A. mismatched TKIP encryptionB. null SSIDC. cordless phonesD. mismatched SSIDE. metal file cabinetsF. antenna type or directionAnswer: CEF4. Refer to the exhibit. How many broadcast domains exist in the exhibited topology?根据下图,图中的拓扑中存在多少个广播域?A. one A.1B. two B.2C. three C.3D. four D.4E. five E.5F. six F.6Answer: C5. Refer to the exhibit. What two facts can be determined from the WLAN diagram? (Choose two.)5.根据下图,WLAN diagram决定了哪两个事实A. The area of overlap of the two cells represents a basic service set (BSS).A. 两个 cells的overlap的区域描述了一个basic service setB. The network diagram represents an extended service set (ESS).B. 网络描述了一个extended service setC. Access points in each cell must be configured to use channel 1.C. 再每个CELL中的AP必须被配置成使用channel 1D. The area of overlap must be less than 10% of the area to ensure connectivity.D. 为了确保连通性,重叠区域必须小于10%E. The two APs should be configured to operate on different channels.E. 两个访问点应该被配置成工作在不同的频道Answer: BE6. The command frame-relay map ip 10.121.16.8 102 broadcast was entered on the router.Which of the following statements is true concerning this command?6.路由器上输入命令frame-relay map ip 10.121.16.8 102 broadcast,以下选项正确的是?A. This command should be executed from the global configuration mode.A.该命令应该在全局配置模式下被执行B. The IP address 10.121.16.8 is the local router port used to forward data.B.IP地址10.121.16.8是本地路由器用来转发数据的接口C. 102 is the remote DLCI that will receive the information.C.102是远端的DLCI它将接受信息。
网络工程师CCNA证书考试题库
网络工程师CCNA证书考试题库网络工程师是当今社会上一种备受青睐的职业,具备CCNA证书是成为一名合格网络工程师的基本要求之一。
CCNA(Cisco Certified Network Associate)是思科公司提供的一种权威的网络证书,考试内容涵盖了网络基础知识、路由器和交换机配置、网络安全等方面的内容。
下面将为大家整理一份网络工程师CCNA证书考试题库,供大家参考和复习。
一、网络基础知识1. OSI参考模型中,哪一层负责确定数据如何在网络中传输?A. 应用层B. 传输层C. 网络层D. 数据链路层2. IP地址的子网掩码用来做什么?A. 区分网络地址和主机地址B. 确定网络的物理拓扑C. 控制网络访问权限D. 提高网络安全性3. TCP协议是一种什么类型的协议?A. 面向连接型B. 面向无连接型C. 面向消息型D. 面向数据流型4. 下面哪种传输介质是最适合用于在大楼内部连接不同楼层的网络设备?A. 双绞线B. 同轴电缆C. 光纤D. 无线电波二、路由器和交换机配置1. 在路由器上配置静态路由需要设置哪些参数?A. 出接口B. 下一跳地址C. 网关地址D. 子网掩码2. 交换机的VLAN技术主要用来实现什么功能?A. 提高网络传输速度B. 划分不同的广播域C. 增加网络安全性D. 实现无线网络连接3. 在路由器上配置NAT技术的目的是什么?A. 增加网络带宽B. 实现内网主机与外网通信C. 提高网络可靠性D. 实现跨平台数据传输4. 交换机端口默认是属于哪个VLAN?A. VLAN1B. VLAN10C. VLAN100D. VLAN1000三、网络安全1. 以下哪种加密算法用于保护传输过程中的数据机密性?A. DESB. MD5C. RSAD. SHA2. 防火墙的作用是什么?A. 限制网络带宽的使用B. 监控网络流量C. 阻止非法入侵D. 加快网络数据传输速度3. 在网络安全方面,ACL(访问控制列表)主要用来控制什么?A. 网络拓扑B. 主机访问权限C. 广播域D. 数据传输速度4. DDos攻击是指什么?A. 拒绝服务攻击B. 数据泄露攻击C. 蠕虫攻击D. 恶意代码攻击通过以上网络工程师CCNA证书考试题库的复习,相信大家可以更加全面地了解CCNA考试的内容要求,提升自己的备考水平。
ccna考试题库最新版
ccna考试题库最新版CCNA(Cisco Certified Network Associate)认证是全球范围内最受欢迎的网络工程师认证之一,具备CCNA认证可以证明一个人在建立、规划、运行、安装和配置中等规模的局域网和广域网方面的专业知识。
为了帮助广大考生顺利通过CCNA考试,不断更新的CCNA考试题库至关重要。
以下是最新版本的CCNA考试题库,希望对考生们有所帮助。
第一部分:网络基础知识1. 什么是OSI七层模型?简要介绍每一层的功能。
2. TCP和UDP之间有哪些区别?请分别举例说明。
3. 什么是IP地址?IP地址的类型有哪些?请列举并简要介绍各自的特点。
4. 什么是子网掩码?为什么在网络中使用子网掩码?5. 简述常见的网络设备有哪些,以及各自的功能与作用。
第二部分:路由和交换技术1. 路由器和交换机之间有何区别?请进行比较并指出各自的优势和劣势。
2. 什么是VLAN?VLAN的作用及在网络中的应用场景是什么?3. OSPF和EIGRP是两种常见的路由协议,请比较它们的特点并举例说明。
4. 请解释静态路由和动态路由的概念以及在网络中的应用。
5. 交换机在网络中扮演什么角色?交换机的MAC地址表是如何工作的?第三部分:网络安全和管理1. 网络安全的重要性是什么?请列举几种常见的网络安全威胁并介绍应对策略。
2. 什么是ACL(访问控制列表)?ACL的作用是什么?请给出一个ACL的配置示例。
3. VPN是什么?VPN的工作原理及在企业网络中的应用。
4. SNMP是网络管理中常用的协议,它的作用是什么?请解释SNMP中的几个重要概念。
5. 如何保护无线网络的安全?请列举几种方法。
第四部分:WAN技术1. 什么是WAN?WAN的主要特点是什么?2. PPP协议和HDLC协议分别是什么?请比较它们的异同。
3. 什么是Frame Relay?Frame Relay的工作原理及在WAN中的应用。
4. 请解释T1和E1的概念,以及它们在传输速率和应用方面的差异。
2023年CCNA考试真题
2023年CCNA考试真题2023年CCNA考试正式开考啦!本次考试涉及网络技术的基础知识,将对考生的技术水平进行全面考察。
下面是本次考试的真题,希望能够帮助考生更好地复习。
【第一部分:选择题】(共10题,每题2分,共计20分)1. OSI模型中,位于网络层的协议是:A. TCPB. IPC. HTTPD. UDP2. 下面哪个命令可以查看路由表信息:A. pingB. tracertC. ipconfigD. route print3. 在IP地址192.168.0.1/24中,/24表示什么意思:A. 子网掩码B. 路由器IP地址C. 网络IDD. 主机ID4. 下面哪个协议可以实现主机与交换机之间的通信:A. BGPB. ARPC. MPLSD. SNMP5. 下面哪个命令可以查看IP地址的连通性:A. telnetB. netstatC. pingD. tracert6. VLAN是指:A. 虚拟本地区域网络B. 可视化局域网C. 个人局域网D. 无线局域网7. 下面哪个设备可以实现不同局域网之间的互联:A. 集线器B. 路由器C. 交换机D. 网桥8. 下面哪个协议负责在网络中寻找设备的物理地址:A. ARPB. ICMPC. OSPFD. BGP9. 下面哪个命令可以查看交换机的端口信息:A. show ip interface briefB. show mac-address-tableC. show running-configD. show version10. 下面哪个协议可以实现安全的远程登录:A. FTPB. HTTPC. SSHD. Telnet【第二部分:填空题】(共5题,每题4分,共计20分)1. 在OSI模型中,位于物理层的设备是_________。
2. 在TCP/IP协议族中,位于传输层的协议是_________。
3. IP地址由_________位二进制数组成。
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CCNA - Semester 1 - Skills Based Final Exam - Instructor Training
Name: _____________Date: _________
Part 1 - Cable Build / Test
Objective:
Build an Ethernet 10BaseT straight-through cable to connect a workstation to a hub or switch. Use
UTP CAT5 cable and wire all eight conductors using the correct wire colors and pins for either a
T568A or T568B wiring standards. Test the cable with a cable tester to verify continuity, correct
pinouts and cable length. This cable can be used to connect your workstation to the hub or switch for
exam part 2.
Directions:
Obtain a piece of CAT 5 cable (length may vary depending on use) and two RJ45 connectors. Use a
crimping tool to attach the RJ 45 connectors to the cable. Use a cable tester to test the cable to verify
that is functional. Indicate which cabling pinout standard (T568A or T568B) you will use _______
The following tests are pass / fail:
1) Are the correct wires in the correct positions on pins 1 through 8? Initial _______
2) Does the cable test OK with a cable tester? Initial _______
Pass / Fail: ____
Semester 1 Skills Based Final – Part 2 Network Connection
Workstation #: _______
Objective:
Connect your workstation to a LAN. Configure the network settings and troubleshoot as necessary.
Use your web browser to connect to router interface 152.20.71.237 and display the web interface.
After the workstation is successfully connected to the network, the instructor will introduce problems
into the workstation and/or network that must be resolved and documented in the space provided.
Include the following: symptoms, causes, details of tests done, detailed problem results (from layer 1
testing), detailed solutions.
You will be assigned a workstation number that will become the useable subnet # with which you
will perform this assessment. Make sure you have an appropriate assigned subnet number
before starting.
You will be using a class C network 193.5.5.0 that is divided into subnets by borrowing 5 bits from
the host portion of the address. The subnet number assigned is the same usable subnet (1st, 2nd 3rd
etc.) as your workstation number. The instructor must initial each step as you answer the following
questions. The default gateway (nearside router port) for your host is 193.5.5.1.
Write the IP address of your workstation here: ____________________
1. What is the subnet mask? ____________________________ Initial __________
2. Subnet host IP address range? _________________________ Initial __________
3. Network address of your subnet? ______________________ Initial __________
4. Broadcast address of your subnet? _____________________ Initial __________
5. Ping the router default gateway. Initial __________
6. Open the web page at 152.20.71.237 with your browser. Initial __________
7. Identify and resolve troubleshooting problems. Initial __________
Pass / Fail: _______
Troubleshooting Activity Record (use back if necessary)
Symptom / Cause Tests / Results Detailed Solutions
WS1 WS2 WS3
…