[工學(xué)]網(wǎng)絡(luò)技術(shù)實(shí)訓(xùn)CH2_TCPIP協(xié)議.ppt

1、第二章TCP/IP協(xié)議棧,TCP/IP 協(xié)議族,7,6,5,4,3,2,5,4,3,2,應(yīng)用層,表示層,會話層,傳輸層,網(wǎng)絡(luò)層,數(shù)據(jù)鏈路層,物理層,1,應(yīng)用層,主機(jī)到主機(jī)層,Internet層,1,網(wǎng)絡(luò)接入層,應(yīng)用層概述,* 路由器使用,應(yīng)用層,主機(jī)到主機(jī)層,Internet層,文件傳輸 - TFTP * - FTP * - NFS E-Mail - SMTP 遠(yuǎn)程登陸 - Telnet * - rlogin * 網(wǎng)絡(luò)管理 - SNMP * 名稱管理 - DNS*,網(wǎng)絡(luò)接入層,主機(jī)到主機(jī)層概述,Transmission Control Protocol (TCP) User Datagram

2、Protocol (UDP),應(yīng)用層,主機(jī)到主機(jī)層,Internet層,網(wǎng)絡(luò)接入層,面向連接 非面向連接,TCP 數(shù)據(jù)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,B

3、it 31,沒有順序號和確認(rèn)號,UDP 數(shù)據(jù)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,端口號,TCP,端口號,FTP,傳輸層,TELNET,DNS,SNMP,TFTP,SMTP,UDP,應(yīng)用層,21,23,25,53,69,161,RIP,520,發(fā)送 SYN (seq=100 ctl=SYN),接收 SYN,Host A,Host B,TCP 三次握手,發(fā)送 SYN (seq=100(隨機(jī)) ctl=

4、SYN),接收 SYN,發(fā)送 SYN, ACK (seq=300 (隨機(jī)) ack=101(100+1) ctl=syn,ack),Host A,Host B,接收 SYN,TCP 三次握手,發(fā)送 SYN (seq=100 ctl=SYN),接收 SYN,發(fā)送 SYN, ACK (seq=300 ack=101 ctl=syn,ack),建立會話 (seq=101（100+1） ack=301(300+1) ctl=ack),Host A,Host B,接收 SYN,TCP 三次握手,TCP連接建立,TCP 簡單確認(rèn),滑動窗口 = 1,發(fā)送方,接收方,TCP 簡單確認(rèn),滑動窗口 = 1,發(fā)送方

5、,接收方,發(fā)送 1,接收 1,TCP 簡單確認(rèn),滑動窗口 = 1,發(fā)送方,接收方,發(fā)送 1,接收 1,接收 ACK 2,發(fā)送 ACK 2,TCP 簡單確認(rèn),滑動窗口 = 1,發(fā)送方,接收方,發(fā)送 1,接收 1,接收 ACK 2,發(fā)送 ACK 2,發(fā)送 2,接收 2,TCP 簡單確認(rèn),滑動窗口 = 1,發(fā)送方,接收方,發(fā)送 1,接收 1,接收 ACK 2,發(fā)送 ACK 2,發(fā)送 2,接收 2,接收 ACK 3,發(fā)送 ACK 3,TCP 簡單確認(rèn),滑動窗口 = 1,發(fā)送方,接收方,發(fā)送 1,接收 1,接收 ACK 2,發(fā)送 ACK 2,發(fā)送 2,接收 2,接收 ACK 3,發(fā)送 ACK 3,發(fā)送

6、3,接收 3,滑動窗口 = 1,發(fā)送方,接收方,發(fā)送 1,接收 1,接收 ACK 2,發(fā)送 ACK 2,發(fā)送 2,接收 2,接收 ACK 3,發(fā)送 ACK 3,發(fā)送 3,接收 3,接收 ACK 4,發(fā)送 ACK 4,TCP 簡單確認(rèn),TCP 窗 口,發(fā)送方,接收方,TCP 窗 口,Window size = 3 Send 2,發(fā)送方,接收方,Window size = 3 Send 1,Window size = 3 Send 3,Window size = 3 Send 2,TCP 窗 口,發(fā)送方,Window size = 3 Send 1,Window size = 3 Send 3,A

7、CK 3 Window size = 2,數(shù)據(jù) 3 被丟棄,接收方,Window size = 3 Send 2,TCP 窗 口,發(fā)送方,Window size = 3 Send 1,Window size = 3 Send 3,ACK 3 Window size = 2,數(shù)據(jù) 3 被丟棄,Window size = 3 Send 4,Window size = 3 Send 3,接收方,Window size = 3 Send 2,TCP 窗 口,發(fā)送方,Window size = 3 Send 1,Window size = 3 Send 3,ACK 3 Window size = 2,數(shù)

8、據(jù) 3 被丟棄,Window size = 3 Send 4,Window size = 3 Send 3,ACK 5 Window size = 2,接收方,Internet 層概述,OSI 網(wǎng)絡(luò)層對應(yīng)的是TCP/IP的internet層,Internet Protocol (IP) Internet Control Message Protocol (ICMP) Address Resolution Protocol (ARP) Reverse Address Resolution Protocol (RARP),應(yīng)用層,主機(jī)到主機(jī)層,Internet層,網(wǎng)絡(luò)接入層,IP 數(shù)據(jù),Versi

9、on(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),Time to live (8),Protocol (8),Header checksum (16),Source IP Address (32),2

10、0Bytes,決定上層協(xié)議,協(xié)議域,TransportLayer,InternetLayer,TCP,UDP,ProtocolNumbers,IP,17,6,ICMP協(xié)議,Application,Transport,Internet,Network Access,Destination Unreachable Echo (Ping) Other,ICMP,1,ARP協(xié)議,,,IP: = ?,我需要知道的物理地址.,ARP協(xié)議,,,IP: = ?,ARP協(xié)議,,IP: Ethernet: 0800.0020.1111,,IP: = ?,ARP協(xié)議,映射 IP Ethe