Introduction xxiii
Day 31: Network Devices, Components, and Applications 1
CCENT 100-101 ICND1 Exam Topics 1
Key Points 1
Devices 1
Switches 2
Routers 3
Physical Layer 4
Network Media Forms and Standards 4
LAN Device Connection Guidelines 6
LANs and WANs 7
Networking Icons 8
Physical and Logical Topologies 8
Cisco Borderless Network 9
Hierarchy in a Borderless Network 10
Network Documentation 11
Classification of Network Applications 12
User Application Interaction 12
Common Network Applications 13
Growth of Network-Based Applications 13
Quality of Service 14
Increased Network Usage 14
The Impact of Voice and Video on the Network 14
Study Resources 15
Day 30: Networking Models and Data Flow 17
CCENT 100-101 ICND1 Exam Topics 17
Key Points 17
The OSI and TCP/IP Models 17
OSI Layers 18
TCP/IP Layers and Protocols 19
Protocol Data Units and Encapsulation 20
The TCP/IP Application Layer 21
The TCP/IP Transport Layer 22
TCP Header 23
Port Numbers 23
Error Recovery 24
Flow Control 25
Connection Establishment and Termination 25
UDP 26
The TCP/IP Internet Layer 27
The TCP/IP Network Access Layer 27
Data Encapsulation Summary 29
Study Resources 30
Day 29: Ethernet and Media Access Control 31
CCENT 100-101 ICND1 Exam Topics 31
Key Topics 31
Ethernet Overview 31
Legacy Ethernet Technologies 32
CSMA/CD 33
Legacy Ethernet Summary 34
Current Ethernet Technologies 34
UTP Cabling 34
Benefits of Using Switches 36
Ethernet Addressing 36
Ethernet Framing 37
The Role of the Physical Layer 38
Study Resources 39
Day 28: Switching Concepts and Operation 41
CCENT 100-101 ICND1 Exam Topics 41
Key Topics 41
Evolution to Switching 41
Switching Logic 42
Collision and Broadcast Domains 43
Frame Forwarding 43
witch Forwarding Methods 44
Symmetric and Asymmetric Switching 44
Memory Buffering 44
Layer 2 and Layer 3 Switching 44
Accessing and Navigating the Cisco IOS 45
Connecting to Cisco Devices 45
CLI EXEC Sessions 46
Using the Help Facility 46
CLI Navigation and Editing Shortcuts 47
Command History 48
IOS Examination Commands 48
Subconfiguration Modes 49
Storing and Erasing Configuration Files 49
Study Resources 51
Day 27: Basic Switch Configuration 53
CCENT 100-101 ICND1 Exam Topics 53
Key Topics 53
Basic Switch Configuration Commands 53
Half-Duplex, Full-Duplex, and Port Speed 55
Automatic Medium-Dependent Interface Crossover (auto-MDIX) 56
Configuring SSH Access 56
Verifying Network Connectivity 58
Study Resources 61
Day 26: VLAN Concepts 63
CCENT 100-101 ICND1 Exam Topics 63
Key Points 63
VLAN Concepts 63
Traffic Types 64
Types of VLANs 65
Voice VLAN Example 65
Trunking VLANs 66
Dynamic Trunking Protocol 68
Study Resources 69
Day 25: VLAN and Trunking Configuration 71
CCENT 100-101 ICND1 Exam Topics 71
Key Points 71
Sample Topology 71
VLAN Configuration and Verification Commands 72
Configuring and Verifying Trunking 75
Study Resources 78
Day 24: The IPv4 Address 79
CCENT 100-101 ICND1 Exam Topics 79
Key Topics 79
IPv4 Addressing 79
Header Format 79
Classes of Addresses 80
Purpose of the Subnet Mask 81
Private and Public IP Addressing 82
Study Resources 83
Day 23: IPv4 Subnetting and VLSM 85
CCENT 100-101 ICND1 Exam Topics 85
Key Topics 85
Subnetting in Four Steps 85
Determine How Many Bits to Borrow 86
Determine the New Subnet Mask 87
Determine the Subnet Multiplier 87
List the Subnets, Host Ranges, and Broadcast Addresses 87
Subnetting Example 1 88
Subnetting Example 2 88
Subnetting Example 3 89
VLSM 89
Summarizing Subnet Addresses 91
Study Resources 93
Day 22: IPv6 Addressing Concepts 95
CCENT 100-101 ICND1 Exam Topics 95
Key Topics 95
Overview and Benefits of IPv6 95
The IPv6 Protocol 96
IPv6 Address Types 97
Unicast 98
Multicast 104
Anycast 106
Study Resources 106
Day 21: Implementing IPv6 Addressing 109
CCENT 100-101 ICND1 Exam Topics 109
Key Topics 109
Representing the IPv6 Address 109
Conventions for Writing IPv6 Addresses 109
Conventions for Writing IPv6 Prefixes 110
IPv6 Subnetting 111
Subnetting the Subnet ID 111
Subnetting into the Interface ID 112
EUI-64 Concept 112
Stateless Address Autoconfiguration 113
Migration to IPv6 114
Study Resources 115
Day 20: Basic Routing Concepts 117
CCENT 100-101 ICND1 Exam Topics 117
Key Topics 117
Packet Forwarding 117
Path Determination and Switching Function Example 118
Routing Methods 119
Classifying Dynamic Routing Protocols 120
IGP and EGP 121
Distance Vector Routing Protocols 121
Link-State Routing Protocols 122
Classful Routing Protocols 122
Classless Routing Protocols 122
Study Resources 123
Day 19: Dynamic Routing Protocols 125
CCENT 100-101 ICND1 Exam Topics 125
Key Topics 125
Dynamic Routing Metrics 125
Administrative Distance 126
IGP Comparison Summary 128
Routing Loop Prevention 128
Link-State Routing Protocol Features 129
Building the LSDB 129
Calculating the Dijkstra Algorithm 130
Convergence with Link-State Protocols 131
Study Resources 132
Day 18: Basic Router Configuration: IPv4 133
CCENT 100-101 ICND1 Exam Topics 133
Key Topic 133
Basic Router Configuration with IPv4 133
Study Resources 142
Day 17: Basic Router Configuration: IPv6 145
CCENT 100-101 ICND1 Exam Topics 145
Key Topic 145
Basic Router Configuration with IPv6 145
Verifying IPv4 and IPv6 Network Connectivity 148
Study Resources 151
Day 16: Static and Default Route Configuration 153
CCENT 100-101 ICND1 Exam Topics 153
Key Topics 153
Static and Default Routing Overview 153
IPv4 Static Route Configuration 154
IPv4 Static Routes Using the Next-Hop Parameter 156
IPv4 Static Routes Using the Exit Interface Parameter 157
IPv4 Default Route Configuration 158
IPv4 Summary Static Route Configuration 161
IPv6 Static Routing 162
IPv6 Static Route Configuration 164
IPv6 Default Route Configuration 165
IPv6 Summary Static Route Configuration 166
Study Resources 167
Day 15: Single-Area OSPFv2 169
CCENT 100-101 ICND1 Exam Topics 169
Key Topics 169
OSPF Operation 169
OSPF Message Format 169
OSPF Packet Types 170
Neighbor Establishment 170
Link-State Advertisements 172
OSPF DR and BDR 173
OSPF Algorithm 173
Link-State Routing Process 174
Single-Area OSPFv2 Configuration 175
The router ospf Command 176
The network Command 176
Router ID 177
Passive Interfaces 177
Modifying the OSPF Metric 178
Verifying OSPFv2 180
Study Resources 184
Day 14: Single-Area OSPFv3 185
CCENT 100-101 ICND1 Exam Topics 185
Key Topics 185
OSPFv2 Versus OSPFv3 185
Similarities Between OSPFv2 and OSPFv3 185
Differences Between OSPFv2 and OSPFv3 186
Single-Area OSPFv3 Configuration 186
The Router ID in OSPFv3 188
Verifying OSPFv3 189
Study Resources 192
Day 13: Inter-VLAN Routing Configuration 195
CCENT 100-101 ICND1 Exam Topics 195
Key Topics 195
Inter-VLAN Routing Concepts 195
Legacy Inter-VLAN Routing 195
Router on a Stick 196
Multilayer Switch 197
Router on a Stick Configuration and Verification 197
Multilayer Switch Inter-VLAN Routing Configuration and Verification 200
Creating Additional SVIs 200
Configuring a 2960 to Route Between VLANs 201
Study Resources 204
Day 12: DHCP Configuration 205
CCENT 100-101 ICND1 Exam Topics 205
Key Topics 205
DHCPv4 205
DHCPv4 Configuration Options 206
Configuring a Router as a DHCPv4 Server 206
Configuring a Router to Relay DHCPv4 Requests 210
Configuring a Router as a DHCPv4 Client 211
DHCPv6 212
SLAAC 212
Stateless DHCPv6 214
Stateful DHCPv6 214
Stateless and Stateful DHCPv6 Operation 214
DHCPv6 Configuration Options 216
Configuring a Router as a Stateless DHCPv6 Server 216
Configuring a Router as a Stateful DHCPv6 Server 217
Study Resources 218
Day 11: ACL Concepts 221
CCENT 100-101 ICND1 Exam Topics 221
Key Topics 221
ACL Operation 221
Defining an ACL 221
Processing Interface ACLs 221
List Logic with IP ACLs 222
Planning to Use ACLs 223
Types of ACLs 224
ACL Identification 225
ACL Design Guidelines 225
Study Resources 226
Day 10: Basic ACL Configuration 227
CCENT 100-101 ICND1 Exam Topics 227
Key Topics 227
Configuring Standard Numbered ACLs 227
Standard Numbered ACL: Permit Specific Network 228
Standard Numbered ACL: Deny a Specific Host 228
Standard Numbered ACL: Deny a Specific Subnet 229
Standard Numbered ACL: Deny Telnet or SSH Access to the Router 229
Configuring Extended Numbered ACLs 230
Extended Numbered ACL: Deny FTP from Subnets 231
Extended Numbered ACL: Deny Only Telnet from Subnet 231
Configuring Named ACLs 231
Standard Named ACL Steps and Syntax 232
Standard Named ACL: Deny a Single Host from a Given Subnet 232
Extended Named ACL Steps and Syntax 233
Adding Comments to Named or Numbered ACLs 233
Verifying ACLs 234
Study Resources 236
Day 9: NAT 237
CCENT 100-101 ICND1 Exam Topics 237
Key Topics 237
NAT Concepts 237
A NAT Example 239
Dynamic and Static NAT 240
NAT Overload 240
NAT Benefits 241
NAT Limitations 241
Configuring Static NAT 242
Configuring Dynamic NAT 243
Configuring NAT Overload 244
Verifying NAT 245
Troubleshooting NAT 246
NAT for IPv6 247
IPv6 Private Address Space 247
Purpose of NAT for IPv6 247
Study Resources 248
Day 8: Basic Device Security 249
CCENT 100-101 ICND1 Exam Topics 249
Key Topics 249
Network Security Overview 249
Physical Security 249
Types of Security Vulnerabilities 250
Mitigating Network Attacks 250
Security Best Practices 250
Securing the IOS 251
Passwords, Authentication, Timers, and SSH 251
Banners 253
Disable Services 255
HTTP Service 255
CDP 255
Small Services 256
Network Time Protocol 256
Study Resources 258
Day 7: Switch Security Configuration 259
CCENT 100-101 ICND1 Exam Topics 259
Key Topics 259
Configuring Port Security 259
Restoring a Port After a Violation 261
Changing the Native and Management VLANs 263
Shutting Down and Securing Unused Interfaces 264
Study Resources 264
Day 6: Troubleshoot IP Addressing Issues 267
CCENT 100-101 ICND1 Exam Topics 267
Key Topics 267
Troubleshooting Methodology 267
Default Gateway 267
Duplicate IP Addresses 268
DHCP Issues 268
Resolve IPv4 Address Conflicts 268
Test Connectivity Using a Static IP Address 269
Verify Switch Port Configuration 269
Test DHCPv4 Operation on the Same Subnet or VLAN 269
Inter-VLAN Routing and IP Addressing Issues 269
Study Resources 271
Day 5: Troubleshoot VLAN Issues 273
CCENT 100-101 ICND1 Exam Topics 273
Key Topics 273
VLAN Troubleshooting 273
Disabled VLANs 274
Study Resources 275
Day 4: Troubleshoot Trunking Issues 277
CCENT 100-101 ICND1 Exam Topics 277
Key Topics 277
Trunking Troubleshooting Overview 277
Check Both Ends of a Trunk 277
Check Trunking Operational States 278
Study Resources 279
Day 3: Troubleshoot ACL Issues 281
CCENT 100-101 ICND1 Exam Topics 281
Key Topics 281
Troubleshooting ACLs 281
Problem 1: Host Has No Connectivity 282
Problem 2: Denied Protocols 283
Problem 3: Telnet Is Allowed #1 284
Problem 4: Telnet Is Allowed #2 284
Problem 5: Telnet Is Allowed #3 285
Study Resources 286
Day 2: Troubleshoot Layer 1 Issues 287
CCENT 100-101 ICND1 Exam Topics 287
Key Topics 287
Media Issues 287
Interface Status and the Switch Configuration 288
Interface Status Codes 288
Duplex and Speed Mismatches 289
Common Layer 1 Problems On Up Interfaces 290
CDP as a Troubleshooting Tool 291
Study Resources 293
Day 1: CCENT Skills Review and Practice 295
Key Topics 295
Introduction 295
Topology Diagram 295
Addressing Table 296
VLANs and Port Assignments Table 296
ISP Configuration 297
Implementation 297
IPv4 Addressing Configuration Requirements 297
HQ-Sw Configuration Requirements 297
HQ Configuration Requirements 298
B1 and B2 Configuration Requirements 298
Staff 299
Verification 299
Your Notes 300
Answer Scripts 302
CCENT Skills Challenge 305
Exam Day 307
What You Need for the Exam 307
What You Should Receive After Completion 307
Summary 308
Post-Exam Information 309
Receiving Your Certificate 309
Determining Career Options 309
Examining Certification Options 310
If You Failed the Exam 310
Summary 310
9781587204531 TOC 11/19/2013
