CCNA 200-301 Portable Command Guide

Scott Empson is enjoying being mostly retired after working for more than 30 years as a teacher—4 years in the Alberta K-12 public school system and 27 years as an instructor/program chair at the Northern Alberta Institute of Technology in Edmonton, Alberta, Canada. He taught a variety of technical courses in Cisco-related topics and soft-skills courses like professional development, organizational behavior, and leadership. Scott also worked with students as they moved from being students to IT professionals through internships and co-op classes. He has a master of education degree along with three undergraduate degrees: a bachelor of arts, with a major in English; a bachelor of education, again with a major in English/language arts; and a Bachelor of Applied Information Systems technology, with a major in network management. Scott lives in Edmonton, Canada, with his wife, Trina, who is still processing that he gets to stay at home while she still must go to work. His children have left the nest and are living their best lives. Scott is now upset that he must do all the yardwork, including shoveling snow during Canadian winters.

• Introduction Part I: Network FundamentalsChapter 1 IPv4 Addressing—How It Works What Are IPv4 Addresses Used For? What Does an IPv4 Address Look Like? Network and Subnetwork Masks Ways to Write a Network or Subnet Mask Network, Node, and Broadcast Addresses Classes of IPv4 Addresses Network vs. Node (Host) Bits RFC (Private) 1918 Addresses Local vs. Remote Addresses Classless Addressing Lessons Learned Chapter 2 How to Subnet IPv4 Addresses Subnetting a Class C Network Using Binary Subnetting a Class B Network Using Binary Binary ANDing So Why AND? Shortcuts in Binary ANDing Chapter 3 Variable Length Subnet Masking (VLSM) IP Subnet Zero VLSM Example Step 1: Determine How Many H Bits Will Be Needed to Satisfy the Largest Network Step 2: Pick a Subnet for the Largest Network to Use Step 3: Pick the Next Largest Network to Work With Step 4: Pick the Third Largest Network to Work With Step 5: Determine Network Numbers for Serial Links Chapter 4 Route Summarization Example for Understanding Route Summarization Step 1: Summarize Winnipeg’s Routes Step 2: Summarize Calgary’s Routes Step 3: Summarize Edmonton’s Routes Step 4: Summarize Vancouver’s Routes Route Summarization and Route Flapping Requirements for Route Summarization Chapter 5 IPv6 Addressing—How It Works IPv6: A Very Brief Introduction What Does an IPv6 Address Look Like? Reducing the Notation of an IPv6 Address Rule 1: Omit Leading 0s Rule 2: Omit All-0s Hextet Combining Rule 1 and Rule 2 Prefix Length Notation IPv6 Address Types Unicast Addresses Multicast Addresses Anycast Addresses Chapter 6 Cables and Connections Connecting a Rollover (Console) Cable to Your Router or Switch Using a USB Cable to Connect to Your Router or Switch Configuring a Terminal Emulator LAN Connections Serial Cable Types Which Cable to Use? ANSI/TIA Cabling Standards T568A Versus T568B Cables Chapter 7 The Command-Line Interface Shortcuts for Entering Commands Using the Tab Key to Complete Commands Console Error Messages Using the Question Mark for Help enable Command exit Command end Command disable Command logout Command reload Command Setup Mode Keyboard Help History Commands terminal Commands show Commands Using the Pipe Parameter ( | ) with the show or more Commands Using the no and default Forms of Commands Part II: LAN Switching TechnologiesChapter 8 Configuring a Switch Help Commands Command Modes Verifying Commands Resetting Switch Configuration Setting Host Names Setting Passwords Setting IP Addresses and Default Gateways The Ethernet Management Port Supported Features on the Ethernet Management Port Configuring and Verifying the Ethernet Management Port Setting Interface Descriptions The mdix auto Command Setting Duplex Operation Setting Operation Speed Setting the Maximum Aging Time of the MAC Table Managing the MAC Address Table Configuration Example Chapter 9 VLANs Creating Static VLANs Creating Static VLANs Using VLAN Configuration Mode Assigning Ports to VLANs Using the range Command Configuring a Voice VLAN Verifying VLAN Information Saving VLAN Configurations Erasing VLAN Configurations Shutting Down or Suspending VLANs Configuration Example: VLANs 9200 Switch Chapter 10 VLAN Trunking Protocol and Inter-VLAN Communication Dynamic Trunking Protocol (DTP) Setting the VLAN Encapsulation Type VLAN Trunking Protocol (VTP) Configuring a VTP Version 3 Primary Server Verifying VTP Inter-VLAN Communication Using an External Router: Router-on-a- Stick Inter-VLAN Communication on a Layer 3 Switch Through a Switch Virtual Interface The autostate command Removing Layer 2 Switchport Capability of an Interface on a Layer 3 Switch Configuring Inter-VLAN Communication on a Layer 3 Switch Inter-VLAN Communication Tips Configuration Example: Inter-VLAN Communication ISP Router CORP Router L2Switch2 (Catalyst 9200) L3Switch1 (Catalyst 9300) L2Switch1 (Catalyst 9200) Chapter 11 Spanning Tree Protocol Spanning Tree Protocol Definition Enabling Spanning Tree Protocol Changing the Spanning-Tree Mode Configuring the Root Switch Configuring a Secondary Root Switch Configuring the Switch Priority of a VLAN Configuring Port Priority Path Cost: Short vs. Long Configuring the Path Cost Configuring STP Timers Configuring Optional Spanning-Tree Features PortFast BPDU Guard (2xxx/Older 3xxx Series) BPDU Guard (3650/9xxx Series) BPDU Filter Root Guard Enabling the Extended System ID Verifying STP Troubleshooting Spanning Tree Protocol Configuration Example: PVST+ Core Switch (9300) Distribution 1 Switch (9300) Distribution 2 Switch (9300) Access 1 Switch (9200) Access 2 Switch (9200) Chapter 12 EtherChannel EtherChannel Interface Modes in EtherChannel Default EtherChannel Configuration Guidelines for Configuring EtherChannel Configuring Layer 2 EtherChannel Configuring Layer 3 EtherChannel Configuring EtherChannel Load Balancing Configuring LACP Hot-Standby Ports Monitoring and Verifying EtherChannel Configuration Example: EtherChannel DLSwitch (9300) ALSwitch1 (9200) ALSwitch2 (9200) Chapter 13 Cisco Discovery Protocol (CDP) and Link Layer Discovery Protocol (LLDP) Cisco Discovery Protocol Configuring CDP Verifying and Troubleshooting CDP CDP Design Tips Link Layer Discovery Protocol (802.1AB) Configuring LLDP (802.1AB) Verifying and Troubleshooting LLDP Part III: Routing TechnologiesChapter 14 Configuring a Cisco Router Router Modes Entering Global Configuration Mode Configuring a Router Name Configuring Passwords Password Encryption Interface Names Moving Between Interfaces Configuring a Serial Interface Assigning an IPv4 Address to a Fast Ethernet Interface Assigning an IPv4 Address to a Gigabit Ethernet Interface Assigning IPv6 Addresses to Interfaces Creating a Message-of-the-Day Banner Creating a Login Banner Mapping a Local Host Name to a Remote IP Address The no ip domain-lookup Command Working with DNS on a Router The logging synchronous Command The exec-timeout Command Saving Configurations Erasing Configurations The write Command Verifying Your Configurations Using show Commands EXEC Commands in Configuration Mode: The do Command Configuration Example: Basic Router Configuration Boston Router Buffalo Router Chapter 15 Interpreting the Routing Table and Configuring Static Routes Interpreting the Routing Table Codes The Default Route The Default Route on a Client Machine Routes Configuring an IPv4 Static Route Static Routes and Recursive Lookups The permanent Keyword Floating Static Routes and Administrative Distance Configuring an IPv4 Default Route Verifying IPv4 Static Routes Configuration Example: IPv4 Static Routes Ketchikan Router Juneau Router Sitka Router Configuring an IPv6 Static Route Floating Static Routes in IPv6 Configuring an IPv6 Default Route Verifying IPv6 Static Routes Chapter 16 Open Shortest Path First (OSPF) OSPFv2 Versus OSPFv3 OSPF Network Types Configuring OSPF Using Wildcard Masks with OSPF Areas Configuring OSPFv2 Using Interface Subcommands Converting from Traditional Configuration to Interface Configuration Mode Optimizing OSPF Parameters Loopback Interfaces Router ID DR/BDR Elections Timers Propagating a Default Route Verifying OSPFv2 Configurations Troubleshooting OSPFv2 Configuration Example: Single-Area OSPF Austin Router Houston Router Galveston Router Part IV: IP ServicesChapter 17 DHCP Configuring a DHCP Server on an IOS or IOS XE Router Using Cisco IP Phones with a DHCP Server Configuring DHCP Option 43 for Access Points Verifying and Troubleshooting DHCP Configuration Configuring a DHCP Helper Address Configuring a DHCP Client on a Cisco IOS or IOS XE Software Ethernet Interface Configuration Example: DHCP Edmonton Router Gibbons Router Chapter 18 Network Address Translation (NAT) Private IP Addresses: RFC 1918 Configuring Dynamic NAT: One Private to One Public Address Translation Configuring PAT: Many Private to One Public Address Translation Configuring Static NAT: One Private to One Permanent Public Address Translation Verifying NAT and PAT Configurations Troubleshooting NAT and PAT Configurations Configuration Example: PAT ISP Router Company Router Chapter 19 Configuring Network Time Protocol (NTP) NTP Configuration NTP Design Securing NTP Enabling NTP Authentication Limiting NTP Access with Access Lists Verifying and Troubleshooting NTP Setting the Clock on a Router Using Timestamps Configuration Example: NTP Core1 Router Core2 Router DLSwitch1 DLSwitch2 ALSwitch1 ALSwitch2 Part V: Security FundamentalsChapter 20 Layer Two Security Features Setting Passwords on a Switch Configuring Static MAC Addresses Configuring Switch Port Security Configuring Sticky MAC Addresses Verifying Switch Port Security Recovering Automatically from Error-Disabled Ports Verifying Autorecovery of Error-Disabled Ports Configuring DHCP Snooping Verifying DHCP Snooping Configuring Dynamic ARP Inspection (DAI) Verifying Dynamic ARP Inspection Configuration Example: Switch Security Chapter 21 Managing Traffic Using Access Control Lists (ACLs) Access List Numbers Using Wildcard Masks ACL Keywords Creating Standard ACLs Applying Standard ACLs to an Interface Verifying ACLs Removing ACLs Creating Extended ACLs Applying Extended ACLs to an Interface The established Keyword The log Keyword Creating Named ACLs Using ACL Configuration Mode Using Sequence Numbers in Named ACLs Removing Specific Lines in Named ACLs Using Sequence Numbers Sequence Number Tips Including Comments in ACLs Restricting Virtual Terminal Access Tips for Configuring ACLs Comparing ACLs in IOS and IOS XE Using a Second (Common) Interface ACL in IOS XE Matching Multiple Nonconsecutive Ports with eq in IOS XE IPv6 ACLs Verifying IPv6 ACLs Configuration Examples: IPv4 ACLs Configuration Examples: IPv6 ACLs Chapter 22 Device Monitoring and Hardening Device Monitoring Configuration Backups Implementing Logging Configuring Syslog Syslog Message Format Syslog Severity Levels Syslog Message Example Device Hardening Configuring Passwords Password Encryption Password Encryption Algorithm Types Configuring the enable secret Password Using Encryption Algorithm Types Configuring SSH Verifying SSH Restricting Virtual Terminal Access Disabling Unneeded Services Part VI: Infrastructure ManagementChapter 23 Troubleshooting and Verification Viewing the Routing Table Clearing the Routing Table Determining the Gateway of Last Resort Determining the Last Routing Update Internet Control Message Protocol Redirect Messages The ping Command Examples of Using the ping and the Extended ping Commands Interpreting the show interface Command Clearing Interface Counters Using CDP to Troubleshoot The traceroute Command The show controllers Command debug Commands Using Timestamps Generic Host Networking Commands The ip http server Command Configuring a Device to Accept a Remote Telnet Connection Using Telnet to Remotely Connect to Other Devices Verifying Telnet Chapter 24 Backing Up and Restoring Cisco IOS Software and Configurations Boot System Commands The Cisco IOS File System Viewing the Cisco IOS File System Commonly Used URL Prefixes for Cisco Network Devices Deciphering IOS Image Filenames Backing Up Configurations to a TFTP Server Restoring Configurations from a TFTP Server Backing Up the Cisco IOS Software to a TFTP Server Restoring/Upgrading the Cisco IOS Software from a TFTP Server Restoring the Cisco IOS Software from ROM Monitor Mode Using Xmodem Restoring the Cisco IOS Software Using the ROM Monitor Environmental Variables and tftpdnld Command Secure Copy Configuring a Secure Copy Server Verifying and Troubleshooting Secure Copy Configuration Example: Using Secure Copy Part VII: Wireless TechnologiesChapter 25 Configuring Secure Wireless Access Connecting to a Cisco Wireless LAN Controller (WLC) Configuring a WLAN Using WPA2 PSK Appendix A How to Count in Decimal, Binary, and Hexadecimal How to Count in Decimal How to Count in Binary How to Count in Hexadecimal Representing Decimal, Binary, and Hexadecimal Numbers Appendix B How to Convert Between Number Systems How to Convert from Decimal to Binary How to Convert from Binary to Decimal How to Convert from Decimal IP Addresses to Binary and from Binary IP Addresses to Decimal A Bit of Perspective How to Convert from Hexadecimal to Binary How to Convert from Binary to Hexadecimal How to Convert from Decimal to Hexadecimal How to Convert from Hexadecimal to Decimal Appendix C Binary/Hex/Decimal Conversion Chart Appendix D Password Recovery Procedures and the Configuration Register The Configuration Register A Visual Representation of the Configuration Register What the Bits Mean The Boot Field Console Terminal Baud Rate Settings Changing the Console Line Speed: CLI Changing the Console Line Speed: ROM Monitor Mode Password-Recovery Procedures for Cisco Routers Password Recovery for Catalyst 9000/9200/9300 Series Switches Password Recovery for Standalone Switches Password Recovery for Stackwise Deployments Appendix E Create Your Own Journal Here 9780138208684 TOC 1/12/2026