[it認(rèn)證]ccna培訓(xùn)2第二章基于tcpip的互連網(wǎng)絡(luò)(編輯修改稿)
2025-02-15 08:47 本頁(yè)面
【文章內(nèi)容簡(jiǎn)介】 st. 10 Seq. 1 Ack. 1028 23 Source Dest. 11 Seq. 1 Ack. 1028 23 Source Dest. 12 Seq. 2 Ack. 我已收到 11, 現(xiàn)在我需要 12. 我發(fā)送 11 169。 1999, Cisco Systems, Inc. ICND— 824 TCP 窗 口 發(fā)送方 接收方 169。 1999, Cisco Systems, Inc. ICND— 825 TCP 窗 口 Window size = 3 Send 2 發(fā)送方 接收方 Window size = 3 Send 1 Window size = 3 Send 3 169。 1999, Cisco Systems, Inc. ICND— 826 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 接收方 169。 1999, Cisco Systems, Inc. ICND— 827 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 169。 1999, Cisco Systems, Inc. ICND— 828 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 ACK 5 Window size = 2 接收方 169。 1999, Cisco Systems, Inc. ICND— 829 沒有順序號(hào)和確認(rèn)號(hào) 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) 8 Bytes 169。 1999, Cisco Systems, Inc. ICND— 830 Inter 層概述 OSI 網(wǎng)絡(luò)層對(duì)應(yīng)的是 TCP/IP的 inter層 Inter Protocol (IP) Inter Control Message Protocol (ICMP) Address Resolution Protocol (ARP) Reverse Address Resolution Protocol (RARP) 應(yīng)用層 傳輸層 Inter層 數(shù)據(jù)鏈路層 物理層 169。 1999, Cisco Systems, Inc. ICND— 831 IP 數(shù)據(jù) 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 Header Length (4) Priority amp。 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) 20 Bytes
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