CCENT CCNA ICND1 100-105 认证考试指南（第5版）

第 1 部分　网络基础

第　1 章 TCP/IP 网络简介 ·························3

“我已经知道了吗？”小测验　······················3

基础内容　···························4

有关网络的观点　·····················4

TCP/IP　网络模型 ····························5

TCP/IP　之前的历史 ····················6

TCP/IP　网络模型概述 ·····················7

TCP/IP　应用层 ·························7

TCP/IP　传输层 ····································9

TCP/IP　网络层 ·········································10

TCP/IP　链路层（数据链路层和物理层） ·····13

TCP/IP　模型和术语 ··································14

OSI　网络模型 ··················································15

比较　OSI 和 TCP/IP ·································16

参照　OSI 各层描述协议 ···························16

OSI　各层及其功能 ···································16

OSI　分层概念及其优点 ····························17

OSI　封装术语 ···········································18

本章回顾　·························································18

复习所有考试要点　···········································19

您应该知道的关键术语　························19

第　2 章 以太网 LAN 基础 ·······················21

“我已经知道了吗？”小测验　·····················21

基础内容　·························································22

以太网　LAN 概述 ·············································22

典型的　SOHO 局域网 ······························22

典型的企业　LAN ·····································23

以太网物理层标准的类型　························24

使用以太网数据链路层的所有链路行为一致　··································25

使用　UTP 构建物理以太网网络 ······················26

使用　UTP 发送数据 ·································26

分解　UTP 以太网链路 ······························26

用于　10BASE-T 和 100BASE-T 的 UTP布线引脚输出 ··············································28 1000BASE-T 的 UTP 电缆引脚分配 ·········31

在以太网网络中发送数据　································31

以太网数据链路层协议　···························31

使用交换机和集线器发送以太网帧　·········34

本章回顾　·························································36

复习所有考试要点　···········································37

您应该知道的关键术语　·······················37

第　3 章 WAN 基础 ··························39

“我已经知道了吗？”小测验　··························39

基础内容　···············40

租用线路　WAN ······························40

根据　LAN 的规模和路由器的数量来安置租用线路 ·········40

租用线路的物理细节　·························41

租用线路的数据链路详解　························44

作为　WAN 技术的以太网 ······················46

创建D二层服务的以太网　WAN···············46

路由器如何使用以太网仿真路由　IP 数据包 ·····················································47

接入互联网······························48

互联网jiu是一个大型的广域网　················48

互联网接入（广域网）链路　····················49

数字用户线路　··········································50

有线互联网　···························51

本章回顾　·················52

复习所有考试要点　···········································52

您应该知道的关键术语　···································52

第　4 章 IPv4 寻址和路由选择基础 ·········55

“我已经知道了吗？”小测验　··························55

基础内容　·························································56

网络层功能概述　··············································56

网络层的路由选择（转发）逻辑　·············57

网络层是如何通过　LAN 和 WAN 选择路由的 ·····················································58

IP　寻址和寻址如何帮助 IP 选择路由 ·······59

路由选择协议　··········································60

IPv4　寻址 ························································60

IP　寻址的规则 ··········································61

IP　地址分组原理 ··················61

IP　子网划分 ·············································65

IPv4　路由选择 ·················································66

IPv4　主机路由选择 ··································66

路由器转发决策和　IP 路由表 ···················67

IPv4　路由选择协议 ··········································68

其他网络层的功能　···········································70

使用名称和域名系统　·······························70

地址解析协议　··········································71

ICMP　响应和 ping 命令 ····························72

本章回顾　·························································72

复习所有考试要点　···········································73

您应该知道的关键术语　·····················73

第　5 章 TCP/IP 传输层和应用层基础 ·····75

　“我已经知道了吗？”小测验 ··························75

基础内容　·························································76

TCP/IP　第 4 层协议：TCP 和 UDP ·················76

传输控制协议　··········································77

用户数据报协议　··························83

TCP/IP　应用层 ····························84

统一资源定位符　······································84

使用　DNS 发现 Web 服务器 ·····················85

使用　HTTP 传送文件 ····················86

接收主机如何确认正确的接收应用程序　·············87

本章回顾　·······················88

复习所有考试要点　······················88

您应该知道的关键术语　················88

第　1 部分回顾 ······························90

第　2 部分 实施基本以太网 LAN

第　6 章 使用命令行界面 ·························95

“我已经知道了吗？”小测验　···················95

基础内容　······················96

访问思科　Catalyst 2960 交换机 CLI ···············96

思科　Catalyst 交换机 ······················96

访问思科　IOS CLI ···························97

CLI　帮助功能 ·····························102

debug　和 show 命令 ························103

配置思科　IOS 软件 ······················104

配置子模式和情景　·························105

存储交换机配置文件　····················106

复制和清除配置文件　···················108

本章回顾　·················108

复习所有考试要点　·····················109

您应该知道的关键术语　·······················109

命令参考　·····························109

第　7 章 分析以太网 LAN 交换 ···············113

“我已经知道了吗？”小测验　···············113

基础内容　···························114

LAN　交换概念 ·······························114

交换逻辑概述　········································115

转发已知的单播帧　························116

获知　MAC 地址 ·························118

泛洪未知单播帧和广播帧　······················118

使用生成树协议避免环路　······················119

LAN　交换总结 ·······································120

验证和分析以太网交换　·································120

演示MAC　获知 ·····································120

交换机接口　············································121

查找　MAC 地址表中的条目 ···················123

管理　MAC 地址表（老化、清除） ··········124

包含多台交换机的　MAC 地址表 ············125

本章回顾　·······················································126

复习所有考试要点　·········································126

实验·······························································127

您应该知道的关键术语　·································127

命令参考　·······················································127

第　8 章 配置基本的交换机管理 ·············129

“我已经知道了吗？”小测验　························129

基础内容　·······················································130

保护交换机　CLI ·············································130

利用简单密码保护用户模式和特权模式　····131

使用本地用户名和密码保护用户模式访问　·······················································134

使用外部身份验证服务器保护用户模式访问　·······················································135

使用　Secure Shell 保护远程访问·············136

启用远程访问　IPv4 ········································138

主机和交换机　IP 设置 ····························139

为交换机配置　IPv4 ································140

配置交换机来使用　DHCP 获知 IP 地址 ····141

验证交换机上的　IPv4 ·····························141

实验中的其他有用设置　·································142

历史缓冲区命令　····································142

logging　synchronous、exec-timeout 和 no ip domain-lookup 命令 ·······················143

本章回顾　·······················································144

复习所有考试要点　·········································144

您应该知道的关键术语　·································144

实验·······························································144　命令参考 ·······················································145

第　9 章 配置交换机接口 ························149

“我已经知道了吗？”小测验　························149

基础内容　·······················································150

配置交换机接口　············································150

配置速率、双工和描述　·························150

使用interface　range 命令配置多个接口 ·····152

利用　shutdown 命令管理性控制接口状态 ·······················································152

使用　no 命令删除配置 ···························154

自动协商　···············································155

端口安全　·······················································158

配置端口安全　········································159

验证端口安全　········································160

端口安全违规操作　·································161

使用端口安全　MAC 地址作为静态安全地址，而非动态地址 ·····························162

本章回顾　·······················································163

复习所有考试要点　·········································163

您应该知道的关键术语　·································163

实验·······························································163

命令参考　·······················································163

第　2 部分回顾 ··········································166

第　3 部分 以太网 LAN：设计、VLAN 和故障排除

第　10 章 分析以太网 LAN 设计 ·············171

“我已经知道了吗？”小测验　························171

基础内容　·······················································172

分析冲突域和广播域　·····································172

以太网冲突域　········································172

以太网广播域　········································175

分析校园　LAN 拓扑 ·······································177

两层校园网设计（折叠核心）　················177

三层校园网设计（核心）　························179

拓扑设计术语　········································181

分析　LAN 物理标准选择 ································181

以太网标准　············································182

为每个链路选择正确的以太网标准　·······183

无线　LAN 与有线以太网相组合 ············184

本章回顾　·······················································186

复习所有考试要点　·········································187

您应该知道的关键术语　·································187

第　11 章 实现以太网虚拟 LAN ··············189

“我已经知道了吗？”小测验　························189

基础内容　·······················································190

虚拟　LAN 概念 ··············································190

用中继功能建立多交换机　VLAN ···········191

在　VLAN 之间转发数据 ························193

VLAN　和 VLAN 中继配置及验证 ···················196

创建　VLAN 和分配接入 VLAN 的接口 ·····196

VLAN　中继协议 ····································200

VLAN　中继配置····································200

实现连接到电话的接口　·························204

数据和语音　VLAN 概念 ························204

总结：交换机上的　IP 电话端口 ·············208

本章回顾　·······················································208

复习所有考试要点　·········································208

您应该知道的关键术语　·································209

命令参考　·······················································209

第　12 章 以太网 LAN 故障排除 ·············211

“我已经知道了吗？”小测验　·························211

基础内容　·······················································213

关于应用故障排除方法的观点　······················213

考试疑难解答　········································213

深入研究问题隔离　·································214

本书涵盖的故障排除　·····························215

分析交换机接口状态和统计数据　···················216

接口状态码和非工作状态的原因　···········216

接口速率和双工问题　·····························217

常见的第　1 层工作接口问题 ··················219

预测哪些交换机将转发帧　······························220

预览　MAC 地址表的目录 ·······················220

分析转发路径　········································222

分析某个接口上的端口安全操作　···················222

故障排除关闭模式和错误禁用恢复　·······223

排除限制和保护模式下的故障　··············224

分析　VLAN 和 VLAN 中继 ····················226

确保在正确的　VLAN 中使用了正确的接入接口 ·······················································227

未定义接入　VLAN ·································227

被禁用的接入　VLAN ·····························228

不匹配的中继运行状态　·························228

本章回顾　·······················································229

复习所有考试要点　·········································230

您应该知道的关键术语　·································230

命令参考　·······················································230

第　3 部分回顾 ··········································232

第　4 部分 IPv4 寻址和子网划分

第　13 章 IPv4 子网划分 ·························237

“我已经知道了吗？”小测验　························237

基础内容　·······················································238

子网划分入门　················································238

通过简单的例子来定义子网划分　···········238

操作角度与子网划分的设计角度　···········239

分析子网划分和寻址的需求　··························240

主机划分到特定子网的规则　··················240

决定子网的数量　····································241

决定每个子网中的主机数量　··················242

一个子网大小通吃　·································242

设计选择　·······················································245

选择一个有类的网络　·····························245

掩码选择　···············································247

创建所有子网的列表　·····························250

实施计划　·······················································251

分配子网到不同位置　·····························252

选择每个子网的动态和静态范围　···········252

本章回顾　·······················································253

复习所有考试要点　·········································254

您应该知道的关键术语　·································254

第　14 章 分析有类 IPv4 网络·················257

“我已经知道了吗？”小测验　························257

基础内容　·······················································257

有类网络概念　················································257

IPv4　网络类型及其相关情况 ··················258

每个网络中的主机数量　·························260

推导网络　ID 和相关号码 ·······················261

例外的网络　ID 和网络广播地址 ············262

有类网络练习　················································262

由一个　IP 地址获得关键信息的练习 ······263

记忆地址分类详细信息的练习　··············263

本章回顾　·······················································264

复习所有考试要点　·········································264

您应该知道的关键术语　·································264

本章知识要点的附加练习·································265

之前练习题答案　············································265

第　15 章 分析子网掩码 ··························269

“我已经知道了吗？”小测验　························269

基础内容　·······················································270

子网掩码转换　················································270

3　种掩码格式 ·········································270

二进制和前缀掩码之间的转换　··············271

二进制和　DDN 掩码之间的转换 ············271

前缀与　DDN 掩码之间的转换 ················273

子网掩码转换练习　·································273

使用掩码识别子网设计选择　··························274

掩码将子网地址划分为两部分　··············275

掩码和分类将地址分为　3 个部分 ···········275

无类和有类地址分配　·····························276

基于　IPv4 地址格式的计算 ····················276

分析子网掩码的练习　·····························277

本章回顾　·······················································278

复习所有考试要点　·········································278

您应该知道的关键术语　·································279

本章知识要点的附加练习　······························279

之前练习题答案　············································279

第　16 章 分析已有子网 ··························283

“我已经知道了吗？”小测验　························283

基础内容　·······················································284

定义子网　·······················································284

网络　172.16.0.0 和 4 个子网的示例 ········284

子网　ID 概念 ··········································285

子网广播地址　········································286 可用地址的范围 ····································286

分析已有子网：二进制　·································287

查找子网　ID ：二进制 ···························287

查找子网广播地址：二进制　··················288

二进制练习题　········································289

二进制方法的捷径　·································290

布尔逻辑计算的简要介绍　······················291

查找地址范围　········································291

分析已有子网：十进制　·································291

用简单的掩码来分析　·····························291

趣味八位组的可预测性　·························292

查找子网　ID ：困难掩码 ·······················293

查找子网广播地址：困难掩码　··············295

分析已有子网的练习　·····································296

选择：记忆或计算　·································297

本章回顾　·······················································297

复习所有考试要点　·········································298

您应该知道的关键术语　·································298

本章知识要点的附加练习　······························298

之前练习题的答案　·········································298

第　4 部分回顾 ··········································300

第　5 部分 实现 IPv4

第　17 章 思科路由器操作 ······················305

“我已经知道了吗？”小测验　························305

基础内容　·······················································306

安装思科路由器　············································306

安装企业级路由器　·································306

安装互联网接入路由器　·························308

在思科路由器上启用　IPv4 支持 ····················309

访问路由器　CLI ·····································309

路由器接口　············································310

路由器辅助端口　····································316

本章回顾　·······················································316

复习所有考试要点　·········································317

您应该知道的关键术语　·································317

命令参考　·······················································317

第　18 章 配置 IPv4 地址和静态路由······319

“我已经知道了吗？”小测验　························319

基础内容　·······················································320

IP　路由 ··························································320

IPv4　路由过程参考 ································321

IP　路由示例 ···········································322

配置　IP 地址和连接的路由 ····························326

连接的路由和　IP 地址命令 ····················326

思科路由器上的　ARP 表 ························327

VLAN　上的子网间的路由 ······················328

配置静态路由　················································333

静态路由配置　········································333

静态主机路由　········································335

没有竞争路由的静态路由　······················335

有竞争路由的静态路由　·························336

静态默认路由　········································337

排除静态路由故障　·································338

本章回顾　·······················································339

复习所有考试要点　·········································340

您应该知道的关键术语　·································340

命令参考　·······················································341

第　19 章 用 RIPv2 获取 IPv4 路由信息·········································343

“我已经知道了吗”小测验　····························343

基础内容　·······················································344

RIP　和路由协议概念 ·····································344

内部网关协议的发展历史　······························345

比较　IGP ·······················································345

距离矢量基础　················································346

RIPv2　特性总结 ············································349

核心　RIPv2 配置和验证 ································350

配置核心　RIPv2 特性 ·····························350

RIPv2　验证 ····················································353

可选　RIPv2 配置和验证 ································357

使用　passive-interface 命令控制 RIP 更新 ·······················································357

支持多个具有zui大路径的等价路由　·······358

理解自动汇总和不连续有类网络　···········358

验证可选的　RIP 特性 ·····························360

RIPv2　默认路由 ·····································362

排除　RIPv2 故障 ···········································365

network　命令缺少和错误的症状·············366

与被动接口相关的问题　·························367

与自动汇总相关的问题　·························367

其他路由器特性导致的　RIP 问题 ···········368

RIP　故障排除问题总结 ··························368

本章回顾　·······················································369

复习所有考试要点　·········································369

您应该知道的关键术语　·································370

命令参考　·······················································370

第　20 章 主机上的 DHCP 和 IP 网络 ····373

“我已经知道了吗？”小测验　························373

基础内容　·······················································374

实施　HSRP 并排除故障 ································374

DHCP　概念 ············································375

路由器上的　DHCP 服务器配置 ··············378

IOS　DHCP 服务器验证 ··························380

排除　DHCP 问题 ····································381

验证主机的　IPv4 装置 ···································385

IP　地址以及掩码配置 ·····························385

DNS　名称解析 ·······································386

默认路由器　············································387

IPv4　地址类型 ···············································388

回顾单播（A、B　和 C 类）IP 地址 ·······389

　IP 广播地址 ···········································389

IPv4　组播地址（D 类地址） ····················390

比较和对比　IP 地址类型 ························391

本章回顾　·······················································392

复习所有考试要点　·········································392

您应该知道的关键术语　·································392

命令参考　·······················································393

第　5 部分回顾 ··········································394

第　6 部分 IPv4 设计和故障排除

第　21 章 子网设计 ·································399

“我已经知道了吗？”小测验　························399

基础内容　·······················································400

选择掩码以满足需求　·····································400

回顾：选择子网和主机位的zui小数量　···400

没有符合要求的掩码　·····························401

只有一个掩码符合要求　·························402

多个掩码符合要求　·································402

正式过程　···············································404

子网掩码选择的练习　·····························405

查找所有子网　ID ···········································405

第　一个子网 ID ：零子网 ·······················405

使用魔法数字查找模型　·························406

子网位小于　8 的正式过程 ······················407

查找子网位正好为　8 的所有子网 ···········409

查找子网位大于　8 的所有子网 ··············410

练习查找所有子网　ID ····························411

本章回顾　·······················································412

复习所有考试要点　·········································412

考生应该知道的关键术语　······························413

本章知识要点的附加练习　······························413

之前练习题的答案　·········································413

第　22 章 变长子网掩码 ··························417

“我已经知道了吗？”小测验　························417

基础内容　·······················································418

VLSM　概念和配置 ·········································418

非类型化和类型化路由协议　··················418

VLSM　配置和验证 ·································419

查找　VLSM 重叠 ···········································420

使用　VLSM 设计子网划分方案 ·············420

查找　VLSM 重叠的示例 ························422

练习查找　VLSM 重叠 ····························423

向现有　VLSM 设计添加一个新子网 ··············423

添加新　VLSM 子网的示例 ·····················423

本章回顾　·······················································425

复习所有考试要点　·········································425

您应该知道的关键术语　·································425

本章知识要点的附加练习　······························425

之前练习题的答案　·········································425

第　23 章 IPv4 故障排除工具 ·················429

“我已经知道了吗？”小测验　························429

基础内容　·······················································429

使用　ping 命令隔离问题 ································429

ping　命令基础 ········································430

使用　ping 命令执行测试的策略和结果 ·······················································430

在　ping 中使用名称和 IP 地址 ················436

使用　traceroute 命令隔离问题 ······················437

traceroute　基础 ·······································437

traceroute　命令的工作原理 ·····················438

标准和扩展　traceroute ····························439

使用　traceroute 将问题隔离到两台路由器 ···················································440

Telnet　和 SSH ···············································441

使用　IOS Telnet 和 SSH 客户端的常见理由 ·······················································442

IOS　Telnet 和 SSH 示例 ··························443

本章回顾　·······················································444

复习所有考试要点　·········································444

您应该知道的关键术语　·································444

第　24 章 排除 IPv4 路由故障·················447

“我已经知道了吗　”小测验 ·························447

基础内容　·······················································447

主机与默认路由器之间的问题　······················447

基于主机　IPv4 设置的根源 ····················448

基于默认路由器配置的根源　··················452

在路由器之间路由数据包的问题　···················455

通过匹配zui明确的路由而进行　IP 转发 ····455

错误编址计划导致的路由问题　··············458

相关故障排除主题简介　·························461

本章回顾　·······················································462

复习所有考试要点　·········································462

第　6 部分回顾 ··········································464

第　7 部分 IPv4 服务：ACL 和 NAT

第　25 章 基本 IPv4 访问控制列表 ·········469 “我已经知道了吗？”小测验 ························469 基础内容 ·······················································470 IPv4 访问控制列表基础 ································470 ACL 位置和方向····································470 匹配包 ···················································471 在发生匹配时执行操作 ·························472 IP ACL 的类型 ·······································472 标准编号 IPv4 ACL ·······································472 IP ACL 的列表逻辑 ································473 匹配逻辑和命令语法 ·····························474 实现标准 IP ACL ···································477

故障排除和验证技巧　·····························480

练习应用标准　IP ACL ····································481

练习创建　access-list 命令 ·······················481

从　ACL 逆向工程到地址范围 ················481

本章回顾　·······················································483

复习所有考试要点　·········································483

您应该知道的关键术语　·································483

本章知识要点的附加练习　······························483

命令参考　·······················································483

之前练习题的答案　·········································484

第　26 章 gao级 IPv4 访问控制列表 ·········487

“我已经知道了吗？”小测验　························487

基础内容　·······················································488

扩展编号的　IP 访问控制列表 ························488

匹配协议、源　IP 和目的 IP ····················489

匹配　TCP 和 UDP 端口号 ······················490

扩展的　IP ACL 配置 ·······························492

练习创建　access-list 命令 ·······················495

命名的　ACL 和 ACL 编辑 ······························495

命名　IP 访问列表 ···································496

使用序列号编辑　ACL ····························497

编号　ACL 配置与命名 ACL 配置对比 ·······················································499

ACL　实现考虑因素 ································499

使用　IPv4 ACL 进行故障排除 ·······················500

分析网络中的　ACL 行为 ························500

ACL　与路由器生成的数据包的交互 ······504

本章回顾　·······················································506

复习所有考试要点　·········································507

您应该知道的关键术语　·································507

命令参考　·······················································507

之前练习题的答案　·········································508

第　27 章 网络地址转换 ··························511

“我已经知道了吗？”小测验　·························511

基础内容　·······················································512

对　IPv4 地址可伸缩性的观点 ························512

CIDR　·····················································513

私有地址　···············································514

网络地址转换概念　·········································514

静态　NAT ···············································515

动态　NAT ···············································516

通过端口地址转换（PAT）　重载 NAT ···············································517

NAT　配置和故障排除 ····································519

静态　NAT 配置 ······································519

动态　NAT 配置 ······································520

动态　NAT 验证 ······································521

NAT　重载（PAT）配置 ··························524

NAT　故障排除 ···························526

本章回顾　·······················································527

复习所有考试要点　·······················527

您应该知道的关键术语　······················527

命令参考　·······················································528

第　7 部分回顾 ··········································530

第　8 部分 IPv6

第　28 章 IPv6 基础 ································535

“我已经知道了吗？”小测验　························535

基础内容　·······················································536

IPv6　简介 ······················································536

IPv6　的历史原因 ····································536

IPv6　路由 ···············································538

IPv6　路由协议 ········································540

IPv6　寻址格式和约定 ····································541

表示完整的（未缩写）IPv6　地址 ··········541

缩写和展开　IPv6 地址 ····························542

地址前缀长度表示　·································543

计算　IPv6 前缀（子网 ID） ·····················543

查找　IPv6 前缀 ·······································543

更难的　IPv6 前缀长度 ····························545

本章回顾　·······················································545

复习所有考试要点　·········································546

您应该知道的关键术语　·································546

本章知识要点的附加练习　······························546

之前练习题的答案　·········································546

第　29 章 IPv6 寻址和子网划分 ··············549

“我已经知道了吗？”小测验　························549

基础内容　·······················································550

全球单播寻址概念　·········································550

公网和私网　IPv4 地址的简单回顾 ·········550

IPv6　全球路由前缀 ································552

全球单播地址的地址范围　······················553

使用全球单播地址进行　IPv6 子网划分 ·······················································554

将地址分配给子网中的主机　··················557

本地wei一单播地址　·········································558

使用　IPv6 本地wei一地址进行子网划分 ·······················································558

全球wei一本地地址的需求　······················559

本章回顾　·······················································560

复习所有考试要点　·········································560

您应该知道的关键术语　·································560

第　30 章 在路由器上实施 IPv6 寻址······563

“我已经知道了吗？”小测验　························563

基础内容　·······················································564

在路由器上实施单播　IPv6 地址 ····················564

静态单播地址配置　·································565

动态单播地址配置　·································571

路由器使用的特殊地址　·································572

本地链路地址　········································572

IPv6　组播地址 ········································574

其他　IPv6 地址 ·······································578

IPv6　寻址配置摘要 ································578

本章回顾　·······················································578

复习所有考试要点　·········································579

您应该知道的关键术语　·································579

本章知识要点的附加练习　······························579

命令参考　·······················································580

之前练习题的答案　·········································580

第　31 章 在主机上实施 IPv6 寻址 ·········583

“我已经知道了吗？”小测验　························583

基础内容　·······················································584

邻居发现协议　················································584

使用　NDP RS 和 RA 发现路由器 ···········585

使用　NDP RS 和 RA 为 SLAAC 发现地址信息 ·······················································586

使用　NDP NS 和 NA 发现邻居链路地址 ·······················································586

使用　NDP NS 和 NA 发现重复地址 ·······587

NDP　摘要···············································588

主机　IPv6 设置的动态配置 ····························588

使用有状态　DHCP 和 NDP 的动态配置 ·······················································589

使用无状态地址自动配置　······················591

排除　IPv6 寻址故障 ·······································593

从主机验证主机　IPv6 连接 ····················593

从邻近的路由器验证主机连接　··············595

本章回顾　·······················································598

复习所有考试要点　·········································598

您应该知道的关键术语　·································598

命令参考　·······················································598

第　32 章 实施 IPv6 路由 ························601

“我已经知道了吗？”小测验　························601

基础内容　·······················································602

连接路由和本地路由　·····································602

连接路由和本地路由规则　······················602

IPv6　连接路由的示例 ·····························603

IPv6　本地路由的示例 ·····························604

IPv6　静态路由 ···············································605

使用出站接口的静态路由　······················606

使用下一跳　IPv6 地址的静态路由 ·········607

静态默认路由　········································609

静态　IPv6 主机路由 ·······························610

浮动静态　IPv6 路由 ·······························610

路由器接口上的　SLAAC 中的默认路由 ·····612

排除静态　IPv6 路由故障 ························613

本章回顾　·······················································615

复习所有考试要点　·········································616

命令参考　·······················································616

第　8 部分回顾 ··········································618

第　9 部分 网络设备管理

第　33 章 设备管理协议 ··························623

“我已经知道了吗　”小测验 ·························623

基础内容　·······················································624

系统消息日志（Syslog）　·······························624

实时将消息发送给当前用户　··················624

存储日志消息供以后查看　······················625

日志消息格式　········································625

日志消息严重等级　·································626

配置和验证系统日志记录　······················627

debug　命令和日志消息 ···························629

网络时间协议（NTP）　···································630

设置时间和时区　····································631

实现　NTP 客户端、服务器和客户端 / 服务器模式 ············································631

NTP　使用环回接口实现更高的可用性 ····633

使用　CDP 和 LLDP 分析拓扑 ························634

检查　CDP 获取的信息 ···························635

配置和验证　CDP 自身 ···························637

实现链路层发现协议　·····························638

本章回顾　·······················································639

复习所有考试要点　·········································640

您应该知道的关键术语　·································640

命令参考　·······················································640

第　34 章 设备安全特性 ··························643

　“我已经知道了吗？”小测验 ························643

基础内容　·······················································644

保护　IOS 密码 ···············································644

使用服务密码加密来加密旧　IOS 密码 ····644

使用散列函数对启用密码进行编码　·······645

为本地用户名隐藏密码　·························648

思科设备加固　················································649

配置登录标语　································