計算機網絡技術項目教程

目錄
項目 1 走進網絡世界：認識計算機網絡 ····································.1
項目介紹 ···································.1
相關知識 ···································.2
1.1 計算機網絡概述 ···················.2
1.1.1 計算機網絡的定義 ·············.2
1.1.2 計算機網絡的組成 ·············.2
1.1.3 計算機網絡的分類 ·············.4
1.1.4 計算機網絡的發展史 ··········.9
1.2 網絡傳輸介質 ·····················.11
1.2.1 有線傳輸介質 ·················.11
1.2.2 無線傳輸介質 ·················.13
1.3 常見的網絡設備 ··················.14
1.3.1 網卡 ···························.14
1.3.2 集線器 ·························.15
1.3.3 交換機 ·························.15
1.3.4 路由器 ·························.16
1.3.5 防火墻 ·························.16
1.3.6 中繼器 ·························.16
1.3.7 網橋 ···························.17
1.3.8 網關 ···························.17
1.3.9 服務器 ·························.17
1.4 計算機網絡新技術 ···············.17
1.4.1 雲計算 ·························.17
1.4.2 物聯網 ·························.20
1.4.3 大數據 ·························.22
1.4.4 人工智能 ······················.25
項目實踐 ··································.28
任務 1 雙絞線的制作 ···············.28
任務 2 eNSP 軟件的使用 ···········.29
項目拓展 ··································.32
習題 ········································.34
項目 2 解密網絡語言：探秘網絡體系與協議 ································.35
項目介紹 ···································.35
相關知識 ···································.36
2.1 網絡協議概述 ······················.36
2.1.1 網絡協議的定義 ···············.36
2.1.2 網絡協議的組成要素 ··········.37
2.1.3 網絡協議在通信中的作用 ····.37
2.1.4 分層結構 ······················.38
2.2 OSI 參考模型 ······················.39
2.2.1 OSI 參考模型概述·············.39
2.2.2 各層功能 ······················.40
2.2.3 數據傳輸過程 ·················.50
2.3 TCP/IP 參考模型 ··················.53
2.3.1 TCP/IP 參考模型概述 ·········.53
2.3.2 各層功能 ······················.54
2.3.3 主要協議的層次關系 ··········.55
2.4 OSI 參考模型與 TCP/IP 參考模型的比較 ·························.55
2.4.1 各層對應關系 ·················.55
2.4.2 協議與功能對比 ···············.56
項目實踐 ···································.56
任務 1 常用網絡命令的使用 ········.56
任務 2 使用 Wireshark 進行網絡抓包 ··························.60
項目拓展 ···································.63
習題 ·········································.67
項目 3 定位網絡身份：配置 IP 地址 ····.69
項目介紹 ···································.69
相關知識 ···································.70
3.1 IP 地址概述 ························.70
3.1.1 IP 地址的定義 ·················.70
3.1.2 IP 地址的表示方法············.70
3.2 IP 地址的分類 ·····················.72
3.2.1 A 類地址 ······················.72
3.2.2 B 類地址 ······················.72
3.2.3 C 類地址 ······················.72
3.2.4 D 類地址 ······················.73
3.2.5 E 類地址 ·······················.73
3.3 特殊 IP 地址 ·······················.73
3.3.1 私有地址 ······················.73
3.3.2 公網地址 ······················.74
3.3.3 保留地址 ······················.74
3.3.4 特殊用途地址 ·················.74
3.4 子網劃分 ···························.75
3.4.1 子網掩碼概念 ·················.75
3.4.2 子網劃分方法 ·················.75
3.4.3 子網劃分步驟 ·················.76
項目實踐 ··································.77
任務 1 IP 地址查看與配置 ··········.77
任務 2 IP 地址規劃 ·················.80
項目拓展 ··································.82
習題 ········································.84
項目 4 搭建小型局域網：交換機組網實戰 ···································.86
項目介紹 ··································.86
相關知識 ··································.87
4.1 局域網概述 ························.87
4.1.1 局域網的定義 ·················.87
4.1.2 局域網的發展史 ··············.87
4.1.3 局域網的特點 ·················.89
4.1.4 局域網的分類 ·················.90
4.2 局域網的組成 ·····················.91
4.2.1 硬件系統 ······················.91
4.2.2 軟件系統 ······················.92
4.3 虛擬局域網（VLAN） ··········.94
4.3.1 VLAN 的定義及產生背景 ····.94
4.3.2 VLAN 的分類 ·················.95
4.3.3 VLAN 鏈路 ····················.95
4.3.4 VLAN 端口 ····················.96
4.3.5 VLANIF 接口 ··················.98
4.3.6 網關 ····························.99
項目實踐 ·································.100
任務 1 單交換機 VLAN 配置 ·····.100
任務 2 跨交換機 VLAN 配置 ·····.105
任務 3 三層交換機配置 ···········.111
項目拓展 ·································.115
習題 ·······································.119
項目 5 讓網絡暢通無阻：路由器配置實戰 ·································.121
項目介紹 ·································.121
相關知識 ·································.122
5.1 網絡互聯概述 ····················.122
5.1.1 網絡互聯的定義 ·············.122
5.1.2 網絡互聯的作用 ·············.123
5.1.3 網絡互聯的類型 ·············.124
5.1.4 網絡互聯的層次與技術分類 ··························.124
5.2 路由器 ·····························.125
5.2.1 路由器概述 ··················.125
5.2.2 路由器基本原理 ·············.126
5.3 直連路由和靜態路由 ···········.128
5.3.1 直連路由 ····················.128
5.3.2 靜態路由 ····················.129
5.3.3 默認路由 ····················.131
5.4 動態路由 ··························.132
5.4.1 動態路由概述 ···············.132
5.4.2 RIP ···························.134
5.4.3 OSPF 協議 ···················.136
5.4.4 路由重分布 ··················.139
項目實踐 ·································.140
任務 1 配置直連路由實現網絡互通 ························.140
任務 2 配置靜態路由實現網絡互通 ························.143
任務 3 配置默認路由實現網絡互通 ························.147
任務 4 配置 RIP 實現小型網絡的動態路由 ··················.151
任務 5 配置 OSPF 協議實現中大型網絡的動態路由 ··········.156
項目拓展 ································.162
習題 ······································.167
項目 6 守護網絡安全：訪問控制與優化實戰 ···························.168
項目介紹 ································.168
相關知識 ································.169
6.1 因特網接入 ······················.169
6.1.1 概述 ·························.169
6.1.2 常見接入方式 ···············.169
6.1.3 接入設備 ····················.170
6.2 訪問控制列表（ACL） ·······.170
6.2.1 ACL 工作原理 ··············.171
6.2.2 ACL 應用流程和原則 ·······.171
6.2.3 ACL 類型 ····················.173
6.2.4 ACL 配置步驟 ··············.173
6.2.5 ACL 應用示例 ··············.174
6.2.6 ACL 配置註意事項 ·········.176
6.3 網絡地址轉換（NAT） ········.177
6.3.1 NAT 工作原理 ···············.177
6.3.2 NAT 類型 ····················.178
6.3.3 NAT 配置步驟 ···············.180
6.3.4 NAT 應用示例 ···············.180
6.3.5 NAT 局限性 ·················.182
項目實踐 ·································.182
任務 1 基本 ACL 應用 ············.182
任務 2 高級 ACL 應用 ············.187
任務 3 應用動態 NAT ·············.193
項目拓展 1 ······························.198
項目拓展 2 ······························.200
習題 ·······································.204
項目 7 AI 賦能網絡應用：智能分析與實踐 ······························.207
項目介紹 ·································.207
相關知識 ·································.208
7.1 AI 賦能網絡應用 ················.208
7.1.1 AI 賦能網絡應用概述 ·······.208
7.1.2 AIaaS 模式 ···················.208
7.2 網絡數據抓包與分析 ···········.208
7.2.1 網絡抓包概述 ···············.208
7.2.2 抓包工具與 AI 融合應用 ····.209
7.2.3 DeepSeek 在網絡分析中的應用 ·······················.209
7.3 Web API 與數據交換規範 ·····.209
7.4 內容安全與科技倫理規範 ·····.210
項目實踐 ·································.210
任務 1 使用 DeepSeek 輔助分析網絡數據包 ················.210
任務 2 在線圖片內容安全審核 ···.212
項目拓展 ·································.215
習題 ·······································.218