【思科网络课件】计算机网络双语教程第十章
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《WAN技术思科网络》PPT课件
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1.3.2 专用链路连接方案
• 专用链接预先建立从客户驻地到远程目的位置的 WAN 通信路径. • 租用线路通常比共享服务的费用要昂贵.
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1.3.3 电路交换连接方案
• 调制解调器和模拟拨号电话线路提供低带宽的专用交换连接。 • 调制解调器在源位置将二进制数据调制为模拟信号，在目的位置将模
的链路速度。 • ATM 提供 PVC 和 SVC，而 PVC 在 WAN 中更常用。
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1.3.5 Internet 连接方案
• DSL 技术是永久在线的连接技术，它使用现有的双绞电话线传输高带宽的数据并为 用户提供 IP 服务。
• DSL 调制解调器将用户设备发送的以太网信号转为 DSL 信号，然后再传输到中心局 • DSLAM 利用 TDM 技术将多个用户线路聚合到一个介质 (medium) 中，通常是 T3 (DS3)
Quality（质量）需求可能会限制您的选择.
Security（ 安全）需求（数据完整性、机
密性和安全性）将是重要的考虑因素。
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1.4 章节实验
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1.4.1 Lab: Challenge Review Lab
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1.5.1 本章总结
• 描述 Cisco 企业体系结构如何通过企业网络提 供集成服务。
拟信号解调为二进制数据。 • PSTN 连接的物理特性将信号的传输速度限制为低于 56 kb/s。 • 调制解调器和模拟线路的优势是简单、可用性高，以及实施成本低。
缺点是数据传输速度慢，需要较长的连接时间。
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1.3.3电路交换连接方案
计算机网络课件 Lec-10
preamble
dest. address
source address
data (payload)
CRC
preamble:
7 bytes with pattern 10101010 followed by one byte with pattern 10101011
used to synchronize receiver, sender clock rates
error detected: frame is dropped
type
preamble
dest. address
source address
data (payload)
CRC
Link Layer 5-55
Ethernet: unreliable, connectionless
connectionless: no handshaking between sending and receiving NICs
common MAC protocol and frame format different speeds: 2 Mbps, 10 Mbps, 100 Mbps, 1Gbps,
10G bps different physical layer media: fiber, cable
application transport network
switching: A-to-A’ and B-to-B’ can transmit simultaneously, without collisions
A
C’
B
61 2
5 43
B’
C
A’
switch with six interfaces (1,2,3,4,5,6)
Chapter10_2PPT课件
ICMP 协议是与组播有关的一个必要的但不是充分的协议。
Chapter10
10.1 GROUP MANAGEMENT 组管理
IGMP is a protocol that manages group membership. The IGMP protocol gives the multicast routers information about the membership status of hosts (routers) connected to the network.
Chapter 10
Internet Group Management Protocol
Chapter10
Internet Group Management Protocol
GROUP MANAGEMENT 管理组 IGMP MESSAGES IGMP 报文 IGMP OPERATION IGMP 操作 ENCAPSULATION 封装 IGMP PACKAGE IGMP 软件包
Chapter10
IGMP operation
路由器R是分发路由器。还有另外的多播路由器（R1和R2），它们 也是这个网络上的路由器R的接收者，但它们可以成为其他网络中某些 组的分发者。
Chapter10
Joining a Group 加入一个组
主机：主机维持着一个有组内成员关系的进程 表。
1. 当一个进程要加入到某个组时，向主机发送请求。 2. 主机在它的表中增加进程名和所请求的组名。
Chapter10
Position of IGMP in the network layer IGMP 在网络层中的位置
IP协议可以用在两种类型的通信：单播和多播。 单播：在一个发送站和一个接收站之间进行的，是一对一的通信。 多播：把同样的报文同时发送给一大批接收站，是一对多的通信。 组：同时接收同一报文的站点的集合。
Chapter10
10.1 GROUP MANAGEMENT 组管理
IGMP is a protocol that manages group membership. The IGMP protocol gives the multicast routers information about the membership status of hosts (routers) connected to the network.
Chapter 10
Internet Group Management Protocol
Chapter10
Internet Group Management Protocol
GROUP MANAGEMENT 管理组 IGMP MESSAGES IGMP 报文 IGMP OPERATION IGMP 操作 ENCAPSULATION 封装 IGMP PACKAGE IGMP 软件包
Chapter10
IGMP operation
路由器R是分发路由器。还有另外的多播路由器（R1和R2），它们 也是这个网络上的路由器R的接收者，但它们可以成为其他网络中某些 组的分发者。
Chapter10
Joining a Group 加入一个组
主机：主机维持着一个有组内成员关系的进程 表。
1. 当一个进程要加入到某个组时，向主机发送请求。 2. 主机在它的表中增加进程名和所请求的组名。
Chapter10
Position of IGMP in the network layer IGMP 在网络层中的位置
IP协议可以用在两种类型的通信：单播和多播。 单播：在一个发送站和一个接收站之间进行的，是一对一的通信。 多播：把同样的报文同时发送给一大批接收站，是一对多的通信。 组：同时接收同一报文的站点的集合。
《计算机英语》课件Chapter 10 Internet
10.1 Internet
A majority of widely accessible information on the Internet consists of inter-linked hypertext documents and other resources of the World Wide Web (WWW).
10.5 Domain Name System
The Domain Name System (DNS) is a hierarchical naming system for computers, services, or any resource participating in the Internet.
S afari
O pera
F irefox
IE
பைடு நூலகம்
F igu re 10 -6 W eb b row sers
N etscape N avigator
10.3.2 The World Wide Web
Through keyword-driven Internet research using search engines like
Bcc. Stands for “blind carbon copy”. This is similar to the Cc: feature, except that Bcc: recipients are invisible to all of the other recipients of the message.
《计算机英语》课件Chapter 10 Internet
Chapter 10 Internet
Objective After reading this chapter, you should be able to: Master Internet, Web, TCP/IP, E-mail, FTP, and Telnet terms. Know how to access the Internet. Know how to send E-mail. Explain IP address, DNS, Search Engines. Describe Some of Web utilities.
计算机网络基础知识ppt课件 英文版
sketch map
Main function: to achieve the communication and resource sharing1． Basic function: data communication Main features: resource sharing
data
Classification: wide area network （WAN）：Tens to thousands of kilometers local area network （ALN） A few meters to a few kilometers metropolitan area network（MAN） （Between WAN and LAN）
1.2
The basis of computertion -- in the form of an electrical signal to the data transmitted from one end to the other end. 2、 The m ai n technol ogy -- "t he maxi m um transmission rate index of data communication" 3、Modulation, demodulation (Modem): converting the data signals and analog signals.
批注本地保存成功开通会员云端永久保存去开通
What is a computer network
? ?
The computer network is the computer system in different geographical location and function of independent by communication lines are interconnected, the system realizes the sharing and communication of cyber source in the network management software
【思科网络课件】计算机网络双语教程第五章
ITE PC v4.0 Chapter 1
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Public
4
Network Layer Protocols and Internet Protocol (IP)
Describe the implications for the use of the IP protocol as it is connectionless
ITE PC v4.0 Chapter 1
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Cisco Public
19
Fundamentals of Routes, Next Hop Addresses and Packet Forwarding
Describe the purpose and use of the destination network in a route
ITE PC v4.0 Chapter 1
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Cisco Public
12
Grouping Devices into Networks and Hierarchical Addressing
Explain the communication problems that emerge when very large numbers of devices are included in one large network
ITE PC v4.0 Chapter 1
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思科网络课件计算机网络双语教程第二章
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Network Structure
Describe how messages are communicated
Data is sent across a network in small “chunks” called segments
ITE PC v4.0 Chapter 1
Describe the importance of addressing and naming schemes in network communications.
ITE PC v4.0 Chapter 1
© 2007 Cisco Systems, Inc. All rights reserved.
© 2007 Cisco Systems, Inc. All rights reserved.
Cisco Public
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Network Structure
Define the components of a network
–Network components • hardware • software
Define network media and criteria for making a network media choice
Network media
this is the channel over which a message travels
ITE PC v4.0 Chapter 1
ITE PC v4.0 Chapter 1
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《cisco教材》课件
2 PPP
深入了解PPP协议，它是一种点对点协议，用于建立网络连接。
《Cisco教材》PPT课件
本课件将帮助你全面了解Cisco网络技术，从基础知识开始，深入介绍网络协 议、LAN交换、VLANs、IP寻址、路由协议、无线局域网等。让我们一起探索 网络的奥秘！
网络基础概述
Cisco公司
介绍Cisco公司的背景和其在网络领域的重要性。
网络基础知识
深入了解计算机网络的基本概念和组成部分。
ACLs配置
学习如何配置和管理ACLs，实现网络流量 的过滤和控制。
无线局域网和安全
无线局域网
探索无线局域网技术和设备，如无线路由器和 访问点。
网络安全
了解无线网络的安全威胁和防护措施，如 WPA2和防火墙。
广域网技术
1 Fram e Relay
介绍Frame Relay技术，它是一种广域网传输协议，用于远程通信。
路由协议
1
R IP
介绍RIP路由协议（距离矢量协议）的工作原理和应用场景。
2
OSPF
深入了解OSPF路由协议（链路状态协议）的特点和优势。
3
EIG RP
探索EIGRP路由协议（增强型内部网关路由协议）的原理和功能。
访问控制列表（ACLs）
ACLs概述
介绍ACLs的作用和应用场景，如访问控制 和网络安全策略。
网协议和模型
1
网络协议
介绍常见的网络协议，如TCP/IP和HTTP，并探究它们的作用。
2
网络模型
理解OSI网络模型和TCP/IP协议栈，以及它们在数据传输中的重要性。
3
网络安全
讨论网络安全协议和技术，如SSL和VPN，以保护网络通信的安全性。
深入了解PPP协议，它是一种点对点协议，用于建立网络连接。
《Cisco教材》PPT课件
本课件将帮助你全面了解Cisco网络技术，从基础知识开始，深入介绍网络协 议、LAN交换、VLANs、IP寻址、路由协议、无线局域网等。让我们一起探索 网络的奥秘！
网络基础概述
Cisco公司
介绍Cisco公司的背景和其在网络领域的重要性。
网络基础知识
深入了解计算机网络的基本概念和组成部分。
ACLs配置
学习如何配置和管理ACLs，实现网络流量 的过滤和控制。
无线局域网和安全
无线局域网
探索无线局域网技术和设备，如无线路由器和 访问点。
网络安全
了解无线网络的安全威胁和防护措施，如 WPA2和防火墙。
广域网技术
1 Fram e Relay
介绍Frame Relay技术，它是一种广域网传输协议，用于远程通信。
路由协议
1
R IP
介绍RIP路由协议（距离矢量协议）的工作原理和应用场景。
2
OSPF
深入了解OSPF路由协议（链路状态协议）的特点和优势。
3
EIG RP
探索EIGRP路由协议（增强型内部网关路由协议）的原理和功能。
访问控制列表（ACLs）
ACLs概述
介绍ACLs的作用和应用场景，如访问控制 和网络安全策略。
网协议和模型
1
网络协议
介绍常见的网络协议，如TCP/IP和HTTP，并探究它们的作用。
2
网络模型
理解OSI网络模型和TCP/IP协议栈，以及它们在数据传输中的重要性。
3
网络安全
讨论网络安全协议和技术，如SSL和VPN，以保护网络通信的安全性。
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Importance of Network Designs
Describe how to count the segments between router interfaces.
Planning and Cabling Networks
Network Fundamentals – Chapter 10
ITE PC v4.0 Chapter 1
2007 Cisco Systems, Inc. All rights reserved.
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Objectives
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Design an Addressing Scheme for an Internetwork.
Design an address scheme for an internetwork and assign ranges for hosts, network devices and the router interface
ITE PC v4.0 Chapter 1
2007 Cisco Systems, Inc. All rights reserved.
Cisco Public
14
Importance of Network Designs
Given a network requirement, determine the optimum number of sub networks in the larger internetwork.
ITE PC v4.0 Chapter 1
2007 Cisco Systems, Inc. All rights reserved.
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Basic Network Media Required to Make a LAN Connection.
Select the appropriate hardware, including the cabling, to install several computers together in a LAN
ITE PC v4.0 Chapter 1
2007 Cisco Systems, Inc. All rights reserved.
Cisco Public
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Types of Connections in a LAN
Recognize that a different class of cables is used to connect WANs, and that the cables, standards and ports are different than those in use by LANs.
Design an addressing scheme for an inter-network and assign ranges for hosts, network devices and the router interface. Compare and contrast the importance of network designs
ITE PC v4.0 Chapter 1
2007 Cisco Systems, Inc. All rights reserved.
Cisco Public
13
Importance of Network Designs
Determine the total number of hosts in a network, accounting for present and future requirements
ITE PC v4.0 Chapter 1
2007 Cisco Systems, Inc. All rights reserved.
Cisco Puቤተ መጻሕፍቲ ባይዱlic
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Types of Connections in a LAN
Identify the pinout of the straight-through and crossover cables
Cisco Public
17
ITE PC v4.0 Chapter 1
2007 Cisco Systems, Inc. All rights reserved.
Cisco Public
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ITE PC v4.0 Chapter 1
2007 Cisco Systems, Inc. All rights reserved.
Cisco Public
11
Design an Addressing Scheme for an Internetwork.
Calculate the address ranges for sub networks
ITE PC v4.0 Chapter 1
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Cisco Public
16
Summary
ITE PC v4.0 Chapter 1
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ITE PC v4.0 Chapter 1
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Basic Network Media Required to Make a LAN Connection.
To identify some key aspects of the devices they will be employing in a LAN
ITE PC v4.0 Chapter 1
2007 Cisco Systems, Inc. All rights reserved.
Cisco Public
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Types of Connections in a LAN
Define the role of device management connections when using Cisco equipment.
ITE PC v4.0 Chapter 1
2007 Cisco Systems, Inc. All rights reserved.
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Importance of Network Designs
Given a network scenario, develop an appropriate networking scheme
- Identify the pin out configurations for straight-through and crossover cables. Identify the different cabling types, standards and ports used for WAN connections. Define the role of device management connections when using Cisco equipment.
Identify the basic network media required to make a LAN connection. Identify the types of connections for intermediate and end device connections in a LAN.
ITE PC v4.0 Chapter 1
2007 Cisco Systems, Inc. All rights reserved.
Cisco Public
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Basic Network Media Required to Make a LAN Connection.
Connect two computers with a switch
ITE PC v4.0 Chapter 1
2007 Cisco Systems, Inc. All rights reserved.
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Types of Connections in a LAN
Identify the correct cable to use in connecting intermediate and end devices in a LAN.
ITE PC v4.0 Chapter 1
2007 Cisco Systems, Inc. All rights reserved.
Cisco Public
5
Types of Connections in a LAN
Given a specific network connection, identify the type of cable required to make the connection