基于TCPIP的互联网络.ppt

1、第三章基于TCP/IP的互连网络,通过本章的学习，要求掌握以下内容： 了解TCP/IP协议栈，各个分层的主要功能、IP协议的应用 掌握IP地址分类，子网掩码的作用，识别网络标识号、主机标识号，子网的数目,本章目标,早期的协议族 全球范围,TCP/IP介绍,主机,Internet,TCP/IP,主机,TCP/IP 协议族,7,6,5,4,3,2,5,4,3,2,应用层,表达层,会话层,传输层,网络层,数据链路层,物理层,1,应用层,传输层,Internet层,数据链路层,物理层,1,应用层概述,路由器使用,应用层,传输层,Internet层,数据链路层,物理层,文件传输 - TFTP * - F

2、TP * - NFS E-Mail - SMTP 远程登陆 - Telnet * - rlogin * 网络管理 - SNMP * 名称管理 - DNS,传输层概述,Transmission Control Protocol (TCP) User Datagram Protocol (UDP,应用层,传输层,Internet层,数据链路层,物理层,面向连接 非面向连接,端口号,TCP,端口号,FTP,传输层,TELNET,DNS,SNMP,TFTP,SMTP,UDP,应用层,21,23,25,53,69,161,RIP,520,TCP 端口号,源端口,目标端口,Host A,1028,23,S

3、P,DP,Host Z,Telnet Z,目标端口 = 23,TCP 数据格式,Source port (16,Destination port (16,Sequence number (32,Headerlength (4,Acknowledgement number (32,Reserved (6,Code bits (6,Window (16,Checksum (16,Urgent (16,Options (0 or 32 if any,Data (varies,20Bytes,Bit 0,Bit 15,Bit 16,Bit 31,发送 SYN (seq=100 ctl=SYN,接收 S

4、YN,Host A,Host B,TCP 三次握手,发送 SYN (seq=100 ctl=SYN,接收 SYN,发送 SYN, ACK (seq=300 ack=101 ctl=syn,ack,Host A,Host B,接收 SYN,TCP 三次握手,发送 SYN (seq=100 ctl=SYN,接收 SYN,发送 SYN, ACK (seq=300 ack=101 ctl=syn,ack,建立会话 (seq=101 ack=301 ctl=ack,Host A,Host B,接收 SYN,TCP 三次握手,TCP 简单确认,滑动窗口 = 1,发送方,接收方,TCP 简单确认,滑动窗口

5、= 1,发送方,接收方,发送 1,接收 1,TCP 简单确认,滑动窗口 = 1,发送方,接收方,发送 1,接收 1,接收 ACK 2,发送 ACK 2,TCP 简单确认,滑动窗口 = 1,发送方,接收方,发送 1,接收 1,接收 ACK 2,发送 ACK 2,发送 2,接收 2,TCP 简单确认,滑动窗口 = 1,发送方,接收方,发送 1,接收 1,接收 ACK 2,发送 ACK 2,发送 2,接收 2,接收 ACK 3,发送 ACK 3,TCP 简单确认,滑动窗口 = 1,发送方,接收方,发送 1,接收 1,接收 ACK 2,发送 ACK 2,发送 2,接收 2,接收 ACK 3,发送 AC

6、K 3,发送 3,接收 3,滑动窗口 = 1,发送方,接收方,发送 1,接收 1,接收 ACK 2,发送 ACK 2,发送 2,接收 2,接收 ACK 3,发送 ACK 3,发送 3,接收 3,接收 ACK 4,发送 ACK 4,TCP 简单确认,TCP 顺序号和确认号,源端口,目标端口,顺序号 ,确认号 ,Source,Dest,Seq,Ack,1028,23,10,1,我发送 #10,TCP 顺序号和确认号,我已收到 #10, 现在我需要 #11,源端口,目标端口,顺序号 ,确认号 ,1028,23,Source,Dest,10,Seq,1,Ack,1028,23,Source,Dest,

7、11,Seq,1,Ack,我发送 #10,TCP 顺序号和确认号,源端口,目标端口,顺序号 ,确认号 ,1028,23,Source,Dest,11,Seq,2,Ack,1028,23,Source,Dest,10,Seq,1,Ack,1028,23,Source,Dest,11,Seq,1,Ack,我已收到 #10, 现在我需要 #11,我发送 #10,TCP 顺序号和确认号,源端口,目标端口,顺序号 ,确认号 ,1028,23,Source,Dest,11,Seq,2,Ack,1028,23,Source,Dest,10,Seq,1,Ack,1028,23,Source,Dest,11,S

8、eq,1,Ack,1028,23,Source,Dest,12,Seq,2,Ack,我已收到 #11, 现在我需要 #12,我发送 #11,TCP 窗 口,发送方,接收方,TCP 窗 口,Window size = 3 Send 2,发送方,接收方,Window size = 3 Send 1,Window size = 3 Send 3,Window size = 3 Send 2,TCP 窗 口,发送方,Window size = 3 Send 1,Window size = 3 Send 3,ACK 3 Window size = 2,数据 3 被丢弃,接收方,Window size =

9、 3 Send 2,TCP 窗 口,发送方,Window size = 3 Send 1,Window size = 3 Send 3,ACK 3 Window size = 2,数据 3 被丢弃,Window size = 3 Send 4,Window size = 3 Send 3,接收方,Window size = 3 Send 2,TCP 窗 口,发送方,Window size = 3 Send 1,Window size = 3 Send 3,ACK 3 Window size = 2,数据 3 被丢弃,Window size = 3 Send 4,Window size = 3

10、Send 3,ACK 5 Window size = 2,接收方,没有顺序号和确认号,UDP 数据格式,Source port (16,Destination port (16,Length (16,Data (if any,1,Bit 0,Bit 15,Bit 16,Bit 31,Checksum (16,8Bytes,Internet 层概述,OSI 网络层对应的是TCP/IP的internet层,Internet Protocol (IP) Internet Control Message Protocol (ICMP) Address Resolution Protocol (ARP)

11、 Reverse Address Resolution Protocol (RARP,应用层,传输层,Internet层,数据链路层,物理层,IP 数据报的格式,Version(4,Destination IP Address (32,Options (0 or 32 if any,Data (varies if any,1,Bit 0,Bit 15,Bit 16,Bit 31,HeaderLength (4,Priority & Type of Service (8,Total Length (16,Identification (16,Flags(3,Fragment offset (13

12、,Time to live (8,Protocol (8,Header checksum (16,Source IP Address (32,20Bytes,决定上层协议,协议域,TransportLayer,InternetLayer,TCP,UDP,ProtocolNumbers,IP,17,6,ICMP协议,Application,Transport,Internet,Data Link,Physical,Destination Unreachable Echo (Ping) Other,ICMP,1,ARP协议,,,IP:

13、= ,我需要知道的物理地址,ARP协议,,,IP: = ,ARP协议,,IP: Ethernet: 0800.0020.1111,,IP: = ,ARP协议,映射 IP Ethernet Local ARP,,IP: Ethernet: 0800.0020.1111,,IP: = ,RARP协议,Ethernet: 0800.0020.1111 I

14、P = ,我的地址是多少,RARP协议,Ethernet: 0800.0020.1111 IP = ,我的地址是多少,我听到了广播你的地址是 5,RARP协议,Ethernet: 0800.0020.1111 IP: 5,Ethernet: 0800.0020.1111 IP = ,我的地址是多少,我听到了广播你的地址是 5,RARP协议,映射 Ethernet IP,Ethernet: 0800.0020.1111 IP: 5,Ethernet: 0800.0020.1111 IP = ,我的地址是多少,我听到了

15、广播你的地址是 5,断点连接需要确定的地址 路径选择 Location is represented by an address,TCP/IP地址介绍,,,,,,,SA,DA,HDR,DATA,,,,,IP 地 址,255,255,255,255,DottedDecimal,Maximum,Network,Host,32 bits,IP 地 址,255,255,255,255,

16、DottedDecimal,Maximum,Network,Host,1286432168421,11111111,11111111,11111111,11111111,Binary,32 bits,1,8,9,16,17,24,25,32,1286432168421,1286432168421,1286432168421,IP 地 址,255,255,255,255,DottedDecimal,Maximum,Network,Host,1286432168421,11111111,11111111,11111111,11111111,10101100,00010000,01111010,11

17、001100,Binary,32 bits,172,16,122,204,ExampleDecimal,ExampleBinary,1,8,9,16,17,24,25,32,1286432168421,1286432168421,1286432168421,Class A: Class B: Class C: Class D: 多址地址 Class E: 科研用,IP 地址分类,8 bits,8 bits,8 bits,8 bits,IP 地址分类,1,Class A,Bits,0NNNNNNN,Host,Host,Host,8,9,16,17,24,25,32,Range (1-126,1,

18、Class B,Bits,10NNNNNN,Network,Host,Host,8,9,16,17,24,25,32,Range (128-191,1,Class C,Bits,110NNNNN,Network,Network,Host,8,9,16,17,24,25,32,Range (192-223,1,Class D,Bits,1110MMMM,Multicast Group,Multicast Group,Multicast Group,8,9,16,17,24,25,32,Range (224-239,主机地址,,0,2,

19、,1,18,E1,172.16,12,12,网络,主机,网络,端口, ,E0 E1,路由表,,,E0,11111111,计算可用的主机地址,172 16 0 0,10101100,00010000,00000000,00000001,16151413121110 9,87654321,网络,主机,00000000,00000010,11111111,11111111,11111111,11111110,00000000,00000011,11111101,1,2,

20、3,65534,65535,65536,2,65534,N,2N-2 = 216-2 = 65534,IP地址分类练习,地址,类别,网络,主机,,00,4,,6,20,IP地址分类练习（答案,地址,类别,网络,主机,,00,4,,6,20,A,B,C,C,B,Nonexistent,,,201.222.5.

21、0,,,,00,4,,6,网络 ,,不设子网的地址,,,,53,54,网络 ,设置子网的地址,,,,,子网地址,00,,60,,,172

22、.16.3.100,50,E0,172.16,网络,网络,端口, ,E0 E1,新路由表,2,160,主机,,E1,子网地址,00,,60,,,00,50,,E0,E1,172.16,2,160,网络,主机,网络,端口, ,E0 E1,新路由表,子网,子网掩码,255,255,0,0,IPAddress,Default

23、SubnetMask,8-bitSubnetMask,Network,Host,Network,Host,Network,Subnet,Host,16” 表示子网掩码有16位,24”表示子网掩码有24位,11111111,11111111,00000000,00000000,十进制和二进制的转换,10000000=128 11000000=192 11100000=224 11110000=240 11111000=248 11111100=252 11111110=254 11111111=255,128 6432168421,16,网络,主机,172,0,0,10101100,111111

24、11,10101100,00010000,11111111,00010000,00000000,00000000,10100000,00000000,00000000,缺省情况下子网未划分,00000010,缺省情况下的子网掩码,60,,网络号,扩展了8位地址的网络,利用子网掩码划分子网,16,网络,主机,60,,172,2,0,10101100,11111111,10101100,00010000,11111111,00010000,11111111,00000010,10100000,00000000,

25、00000000,00000010,子网,网络号,128 192 224 240 248 252 254 255,利用子网掩码划分子网,网络,主机,60,92,10101100,11111111,10101100,00010000,11111111,00010000,11111111,00000010,10100000,11000000,10000000,00000010,子网,扩展了10位地址的网络,16,172,2,128,网络号,128 192 224 240 248 252 254 255,128 192 224 240 248 252 2

26、54 255,子网掩码练习,地址,子网掩码,类别,子网,0,0,2,,,,子网掩码练习（答案,地址,子网掩码,类别,子网,0,0,2,,,,B,A,A,,,,广播地址,,,,,172.16.

27、3.255 (Directed broadcast,55 (Local network broadcast,X,55 (All subnets broadcast,地址汇总示例,16,172,2,160,10101100,00010000,10100000,00000010,Host,Mask,Subnet,Broadcast,Last,First,60,92,4,1,地址汇总示例,10101100,11111111,00010000,11111111,11111111,10100000,11000

28、000,00000010,Host,Mask,Subnet,Broadcast,Last,First,60,92,1,2,16,172,2,160,地址汇总示例,10101100,11111111,00010000,11111111,11111111,10100000,11000000,00000010,Host,Mask,Subnet,Broadcast,Last,First,60,92,1,2,3,7,16,172,2,160,地址汇总示例,10101100,11111111,00010000,11

29、111111,11111111,10100000,11000000,10000000,00000010,Host,Mask,Subnet,Broadcast,Last,First,60,92,1,2,3,4,16,172,2,160,地址汇总示例,10101100,11111111,00010000,11111111,11111111,10100000,11000000,10000000,00000010,10111111,Host,Mask,Subnet,Broadcast,Last,First,60,255.255.255.

30、192,1,2,3,4,5,6,16,172,2,160,地址汇总示例,10101100,11111111,00010000,11111111,11111111,10100000,11000000,10000000,00000010,10111111,10000001,Host,Mask,Subnet,Broadcast,Last,First,60,92,1,2,3,4,5,6,16,172,2,160,地址汇总示例,10101100,11111111,00010000,11111111,11111111,10100000,11000000,100

31、00000,00000010,10111111,10000001,10111110,Host,Mask,Subnet,Broadcast,Last,First,60,92,1,2,3,4,5,6,7,16,172,2,160,地址汇总示例,10101100,11111111,10101100,00010000,11111111,00010000,11111111,00000010,10100000,11000000,10000000,00000010,10101100,00010000,00000010,10111111,10101100,0001

32、0000,00000010,10000001,10101100,00010000,00000010,10111110,Host,Mask,Subnet,Broadcast,Last,First,60,92,1,2,3,4,5,6,7,8,16,172,2,160,地址汇总示例,10101100,11111111,10101100,00010000,11111111,00010000,11111111,00000010,10100000,11000000,10000000,00000010,10101100,00010000,00000010,101

33、11111,10101100,00010000,00000010,10000001,10101100,00010000,00000010,10111110,Host,Mask,Subnet,Broadcast,Last,First,60,92,28,91,29,90,1,2,3,4,5,6,7,8,9,16,172,2,160,IP Host Address:21 Subnet Mask: ,Subnet Address =

34、 Host Addresses = 54 Broadcast Address = 55 Eight bits of subnetting,Network,Subnet,Host,10101100,00010000,00000010,11111111,21,,10101100,11111111,Subnet,10101100,00010000,00010000,11111111,00000010,00000010,11111111,01111001,00000000,0

35、0000000,B类地址子网规划,Broadcast,Network,子网划分,Other subnets,6,2,8,20 子网 5 主机/子网 C类地址： ,11111000,IP Host Address:21 Subnet Mask: 48,Network,Subnet,Host,21,11000000,11111111,Subnet,11000000,10101000,10101000,11111111,00000101,000

36、00101,11111111,01111001,01111000,48,C类地址子网规划,Subnet Address = 20 Host Addresses = 2126 Broadcast Address = 27 Five Bits of Subnetting,Broadcast,Network,Network,11000000,10101000,00000101,01111111,广播地址练习,地址,类别,子网,广播地址,0,255.255.255.

37、248,子网掩码,,,3,52,7,28,广播地址练习（答案,27,地址,类别,子网,广播地址,0,48,C,3,6,子网掩码,,,A,55,,3,52,B,5,128.16.3

38、2.12,7,28,B,,配置交换机的IP地址,指明IP地址和子网掩码,Switch(config)#ip address ip-address subnet-mask,Switch(config)#ip default-gateway ip-address,指明缺省网关,配置路由器的IP地址,指明IP地址和子网掩码 在路由器的端口配置模式下设置地址,Router(config-if)#ip address ip-address subnet-mask,配置路由器的IP地址,Router(config-line)#ip netm

39、ask-format bitcount | decimal | hexadecimal,在行控制模式下设置IP地址的显示格式,Router#term ip netmask-format bitcount| decimal | hexadecimal,设置正确的IP地址显示格式,利用IP地址静态映射主机地址 通过IP地址和主机名称选择端口,路由器的IP主机命名,Router(config)#ip host name tcp-port-numberaddress address,ip host Norine ip host Roger 172.16.4

40、.3,指明一个或多个名称服务器来解析逻辑地址,路由器名称服务器的设置,Router(config)#ip name-server server-address1 server-address2.server-address6,DNS Server,缺省情况下DNS为Enable,路由器的名称解析,Router(config)#ip domain-lookup Router(config)#end Router#pat Translating ”pat.domain server (55) % Unknown command or computer name, or u

41、nable to find computer address Router#config t Router(config)#no ip domain-lookup Router(config)#end Router#pat Translating ”pat % Unknown command or computer name, or unable to find computer address Router,查看主机名称,Router#show hosts Default domain is not set Name/address lookup uses domain service Na

42、me servers are 55 Host Flags Age Type Address(es) Norine (perm, OK) 0 IP 00 Roger (perm, OK) 0 IP 01 Frank (perm, OK) 0 IP 00 Bob (perm, OK) 0 IP 01,显示主机列表,VLAN 概 述,VLAN 1,VLAN 2,ISL,,,网络层设备连接多个广播域,Router on a stick,Applica

43、tion,TCP,IP,ISL,Ethernet,FastE0/0,将物理端口划分为多个子端口,FastEthernet 0/0,FastEthernet 0/0.2,FastEthernet 0/0.3,FastEthernet 0/0.1,物理端口能够划分为多个逻辑的子端口,ISL 封 装,在子端口上激活ISL封装,Router(config-subif)#encapsulation isl domain,不同VLAN间的路由,VLAN 1,VLAN 2,ISL,interface fastethernet 0/0 no ip address!interface fastethernet

44、0/0.1 ip address encapsulation isl 1interface fastethernet 0/0.2 ip address encapsulation isl 2,FastE0/0,,,广域网间的路由,ISL,interface Serial0 ip address ,S0,,,VLAN 1,VLAN 2,,,可视化目标,core_ server,wg_sw_a 0,wg_sw_l 10.1.1.