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CCENT: Cisco® Certified Entry Networking Technician Study Guide

Name: CCENT: Cisco® Certified Entry Networking Technician Study Guide
Author: Todd Lammle
ISBN: 9780470247020

by Todd Lammle

March 2008

Beginner to intermediate

648 pages

15h 26m

English

Sybex

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Copyright
Dear Reader:
Acknowledgments
About the Author
Introduction
Cisco's Network Support CertificationsCisco CertificationsCisco Certified Entry Network Technician (CCENT)Cisco Certified Network Associate (CCNA)Why Become CCENT/CCNA Certified?Where Do You Take the Exams?Tips for Taking Your CCENT ExamWhat Does This Book Cover?How to Use This BookWhat's on the CD?The Sybex Test Preparation SoftwareElectronic Flashcards for PC, Pocket PC, and Palm DevicesCCENT: Cisco Certified Entry Networking Technician Study Guide in PDFTodd Lammle VideosTodd Lammle AudiosHow to Contact the Author
Assessment Test
Answers to Assessment Test
1. Internetworking
1.1. Internetworking Basics1.1.1. Addressing1.1.2. Hubs, Bridges, Routers, and Switches1.2. Internetworking Models1.2.1. The Layered Approach1.2.2. Advantages of Reference Models1.3. The OSI Reference Model1.3.1. The Application Layer1.3.2. The Presentation Layer1.3.3. The Session Layer1.3.4. The Transport Layer1.3.4.1. Flow Control1.3.4.2. Connection-Oriented Communication1.3.4.3. Windowing1.3.4.4. Acknowledgments1.3.5. The Network Layer1.3.6. The Data Link Layer1.3.6.1. Switches and Bridges at the Data Link Layer1.3.6.2. Binary to Decimal and Hexadecimal Conversion1.3.7. The Physical Layer1.3.7.1. Hubs at the Physical Layer1.4. Ethernet Networking1.4.1. Half- and Full-Duplex Ethernet1.4.2. Ethernet at the Data Link Layer1.4.2.1. Ethernet Addressing1.4.2.2. Ethernet Frames1.4.3. Ethernet at the Physical Layer1.5. Ethernet Cabling1.5.1. Straight-Through Cable1.5.2. Crossover Cable1.5.3. Rolled Cable1.6. Data Encapsulation1.7. The Cisco Three-Layer Hierarchical Model1.7.1. The Core Layer1.7.2. The Distribution Layer1.7.3. The Access Layer1.8. Summary1.9. Exam Essentials1.10. Written Lab 11.10.1. Written Lab 1.1: OSI Questions1.10.2. Written Lab 1.2: Defining the OSI Layers and Devices1.10.3. Written Lab 1.3: Identifying Collision and Broadcast Domains1.10.4. Written Lab 1.4: Binary/Decimal/Hexadecimal Conversion1.11. Review Questions1.12. Answers to Review Questions1.13. Answers to Written Lab 11.13.1. Answer to Written Lab 1.21.13.2. Answers to Written Lab 1.31.13.3. Answers to Written Lab 1.4
2. Internet Protocols
2.1. TCP/IP and the DoD Model2.1.1. The Process/Application Layer Protocols2.1.1.1. Telnet2.1.1.2. File Transfer Protocol (FTP)2.1.1.3. Trivial File Transfer Protocol (TFTP)2.1.1.4. Network File System (NFS)2.1.1.5. Simple Mail Transfer Protocol (SMTP)2.1.1.6. Line Printer Daemon (LPD)2.1.1.7. X Window2.1.1.8. Simple Network Management Protocol (SNMP)2.1.1.9. Domain Name Service (DNS)2.1.1.10. Dynamic Host Configuration Protocol (DHCP)/Bootstrap Protocol (BootP)2.1.2. The Host-to-Host Layer Protocols2.1.2.1. Transmission Control Protocol (TCP)2.1.2.1.1. TCP Segment Format2.1.2.2. User Datagram Protocol (UDP)2.1.2.2.1. UDP Segment Format2.1.2.3. Key Concepts of Host-to-Host Protocols2.1.2.4. Port Numbers2.1.2.4.1. TCP Session: Source Port2.1.2.4.2. TCP Session: Destination Port2.1.2.4.3. TCP Session: Syn Packet Acknowledgment2.1.3. The Internet Layer Protocols2.1.3.1. Internet Protocol (IP)2.1.3.2. Internet Control Message Protocol (ICMP)2.1.3.3. Address Resolution Protocol (ARP)2.1.3.4. Reverse Address Resolution Protocol (RARP)2.1.3.5. Proxy Address Resolution Protocol (Proxy ARP)2.2. IP Addressing2.2.1. IP Terminology2.2.2. The Hierarchical IP Addressing Scheme2.2.2.1. Network Addressing2.2.2.1.1. Network Address Range: Class A2.2.2.1.2. Network Address Range: Class B2.2.2.1.3. Network Address Range: Class C2.2.2.1.4. Network Address Ranges: Classes D and E2.2.2.1.5. Network Addresses: Special Purpose2.2.2.2. Class A Addresses2.2.2.2.1. Class A Valid Host IDs2.2.2.3. Class B Addresses2.2.2.3.1. Class B Valid Host IDs2.2.2.4. Class C Addresses2.2.2.4.1. Class C Valid Host IDs2.2.3. Private IP Addresses2.3. Broadcast Addresses2.4. Summary2.5. Exam Essentials2.6. Written Lab 22.7. Review Questions2.8. Answers to Review Questions2.9. Answers to Written Lab 2
3. IP Subnetting, Variable Length Subnet Masks (VLSMs), Troubleshooting IP, and Introduction to NAT
3.1. Subnetting Basics3.1.1. IP Subnet-Zero3.1.2. How to Create Subnets3.1.3. Subnet Masks3.1.4. Classless Inter-Domain Routing (CIDR)3.1.5. Subnetting Class C Addresses3.1.5.1. Subnetting a Class C Address: The Fast Way!3.1.5.2. Subnetting Practice Examples: Class C Addresses3.1.5.2.1. Practice Example #1C: 255.255.255.128 (/25)3.1.5.2.2. Practice Example #2C: 255.255.255.192 (/26)3.1.5.2.3. Practice Example #3C: 255.255.255.224 (/27)3.1.5.2.4. Practice Example #4C: 255.255.255.240 (/28)3.1.5.2.5. Practice Example #5C: 255.255.255.248 (/29)3.1.5.2.6. Practice Example #6C: 255.255.255.252 (/30)3.1.5.3. Subnetting in Your Head: Class C Addresses3.1.5.4. What Do We Know?3.1.6. Subnetting Class B Addresses3.1.6.1. Subnetting Practice Examples: Class B Addresses3.1.6.1.1. Practice Example #1B: 255.255.128.0 (/17)3.1.6.1.2. Practice Example #2B: 255.255.192.0 (/18)3.1.6.1.3. Practice Example #3B: 255.255.240.0 (/20)3.1.6.1.4. Practice Example #4B: 255.255.254.0 (/23)3.1.6.1.5. Practice Example #5B: 255.255.255.0 (/24)3.1.6.1.6. Practice Example #6B: 255.255.255.128 (/25)3.1.6.1.7. Practice Example #7B: 255.255.255.192 (/26)3.1.6.1.8. Practice Example #8B: 255.255.255.224 (/27)3.1.6.2. Subnetting in Your Head: Class B Addresses3.1.7. Subnetting Class A Addresses3.1.7.1. Subnetting Practice Examples: Class A Addresses3.1.7.1.1. Practice Example #1A: 255.255.0.0 (/16)3.1.7.1.2. Practice Example #2A: 255.255.240.0 (/20)3.1.7.1.3. Practice Example #3A: 255.255.254.0 (/23)3.1.7.1.4. Practice Example #4A: 255.255.255.192 (/26)3.1.7.2. Subnetting in Your Head: Class A Addresses3.2. Variable Length Subnet Masks (VLSMs)3.2.1. VLSM Design3.2.2. Implementing VLSM Networks3.2.3. Can You VLSM in Your Head to Fix a Design?3.3. Troubleshooting IP Addressing3.3.1. Determining IP Address Problems3.4. Introduction to Network Address Translation (NAT)3.5. Types of Network Address Translation3.6. NAT Names3.7. How NAT Works3.8. Summary3.9. Exam Essentials3.10. Written Labs 33.10.1. Written Lab 3.1: Written Subnet Practice #13.10.2. Written Lab 3.2: Written Subnet Practice #23.10.3. Written Lab 3.3: Written Subnet Practice #33.11. Review Questions3.12. Answers to Review Questions3.13. Answers to Written Lab 3.13.14. Answers to Written Lab 3.23.15. Answers to Written Lab 3.3

4. Introduction to the Cisco IOS and SDM
4.1. The IOS User Interface4.1.1. Cisco Router IOS4.1.2. Connecting to a Cisco Router4.1.3. Bringing Up a Router4.1.3.1. Bringing Up a Non-ISR Router (a 2600)4.2. Command-Line Interface (CLI)4.2.1. Entering the CLI from a Non-ISR Router4.2.2. Overview of Router Modes4.2.3. CLI Prompts4.2.3.1. Interfaces4.2.3.2. Subinterfaces4.2.3.3. Line Commands4.2.3.4. Routing Protocol Configurations4.2.3.5. Defining Router Terms4.2.4. Editing and Help Features4.2.5. Gathering Basic Routing Information4.3. Router and Switch Administrative Configurations4.3.1. Hostnames4.3.2. Banners4.3.3. Setting Passwords4.3.3.1. Enable Passwords4.3.3.2. Auxiliary Password4.3.3.3. Console Password4.3.3.4. Telnet Password4.3.3.5. Setting Up Secure Shell (SSH)4.3.3.6. Verifying the SSH service on your router4.3.4. Encrypting Your Passwords4.3.5. Descriptions4.3.5.1. Doing the do Command4.4. Router Interfaces4.4.1. Bringing Up an Interface4.4.1.1. Configuring an IP Address on an Interface4.4.1.2. Configuring DHCP on your router4.4.1.3. Using the Pipe4.4.1.4. Serial Interface Commands4.5. Viewing, Saving, and Erasing Configurations4.5.1. Deleting the Configuration and Reloading the Router4.5.2. Verifying Your Configuration4.5.2.1. Verifying with the show interface Command4.5.2.2. Verifying with the show ip interface Command4.5.2.3. Using the show ip interface brief Command4.5.2.4. Verifying with the show protocols Command4.5.2.5. Using the show controllers Command4.6. Cisco's Security Device Manager (SDM)4.7. Summary4.8. Exam Essentials4.9. Written Lab 44.10. Hands-on Labs4.10.1. Hands-on Lab 4.1: Logging into a Router4.10.2. Hands-on Lab 4.2: Using the Help and Editing Features4.10.3. Hands-on Lab 4.3: Saving a Router Configuration4.10.4. Hands-on Lab 4.4: Setting Your Passwords4.10.5. Hands-on Lab 4.5: Setting the Hostname, Descriptions, IP Address, and Clock Rate4.10.6. Hands-on Lab 4.6: Installing SDM on Your Computer4.11. Review Questions4.12. Answers to Review Questions4.13. Answers to Written Lab 4
5. Managing a Cisco Internetwork
5.1. The Internal Components of a Cisco Router5.2. The Router Boot Sequence5.3. Managing Configuration Register5.3.1. Understanding the Configuration Register Bits5.3.2. Checking the Current Configuration Register Value5.3.3. Changing the Configuration Register5.3.4. Recovering Passwords5.3.4.1. Interrupting the Router Boot Sequence5.3.4.2. Changing the Configuration Register5.3.4.2.1. Cisco ISR/2600 Series Commands5.3.4.2.2. Cisco 2500 Series Commands5.3.4.3. Reloading the Router and Entering Privileged Mode5.3.4.4. Viewing and Changing the Configuration5.3.4.5. Resetting the Configuration Register and Reloading the Router5.3.5. Boot System Commands5.4. Backing Up and Restoring the Cisco IOS5.4.1. Verifying Flash Memory5.4.2. Backing Up the Cisco IOS5.4.3. Restoring or Upgrading the Cisco Router IOS5.4.4. Using the Cisco IOS File System (Cisco IFS)5.4.4.1. Using the Cisco IFS to Upgrade an IOS5.4.5. Using the SDM to Manage the Flash Memory5.5. Backing Up and Restoring the Cisco Configuration5.5.1. Backing Up the Cisco Router Configuration5.5.1.1. Verifying the Current Configuration5.5.1.2. Verifying the Stored Configuration5.5.1.3. Copying the Current Configuration to NVRAM5.5.1.4. Copying the Configuration to a TFTP Server5.5.2. Restoring the Cisco Router Configuration5.5.3. Erasing the Configuration5.5.4. Using the Cisco IOS File System to Manage Your Router's Configuration (Cisco IFS)5.5.5. Using the SDM to Back Up/Restore and Edit the Router's Configuration5.6. Using Cisco Discovery Protocol (CDP)5.6.1. Getting CDP Timers and Holdtime Information5.6.2. Gathering Neighbor Information5.6.3. Gathering Interface Traffic Information5.6.4. Gathering Port and Interface Information5.6.5. Documenting a Network Topology Using CDP5.7. Using Telnet5.7.1. Telnetting into Multiple Devices Simultaneously5.7.2. Checking Telnet Connections5.7.3. Checking Telnet Users5.7.4. Closing Telnet Sessions5.7.5. Using SDM to Telnet into Your Router5.8. Resolving Hostnames5.8.1. Building a Host Table5.8.2. Using DNS to Resolve Names5.9. Checking Network Connectivity and Troubleshooting5.9.1. Using the ping Command5.9.1.1. Pinging with SDM5.9.2. Using the traceroute Command5.9.3. Debugging5.9.4. Using the show processes Command5.10. Summary5.11. Exam Essentials5.12. Written Lab 55.13. Hands-on Labs5.13.1. Hands-on Lab 5.1: Backing Up Your Router IOS5.13.2. Hands-on Lab 5.2: Upgrading or Restoring Your Router IOS5.13.3. Hands-on Lab 5.3: Backing Up the Router Configuration5.13.4. Hands-on Lab 5.4: Using the Cisco Discovery Protocol (CDP)5.13.5. Hands-on Lab 5.5: Using Telnet5.13.6. Hands-on Lab 5.6: Resolving Hostnames5.14. Review Questions5.15. Answers to Review Questions5.16. Answers to Written Lab 5
6. IP Routing
6.1. Routing Basics6.2. The IP Routing Process6.2.1. Testing Your IP Routing Understanding6.2.2. Configuring IP Routing6.2.2.1. Corp Configuration6.2.2.2. R1 Configuration6.2.2.3. R2 Configuration6.2.2.4. R3 Configuration6.2.2.5. 871W Configuration6.2.2.6. 1242AP Configuration6.3. Configuring IP Routing in Our Network6.3.1. Static Routing6.3.1.1. Corp6.3.1.2. R16.3.1.3. R26.3.1.4. R36.3.1.5. 871W6.3.1.6. Verifying Your Configuration6.3.2. Default Routing6.4. Dynamic Routing6.4.1. Routing Protocol Basics6.4.1.1. Administrative Distances6.4.1.2. Routing Protocols6.5. Distance-Vector Routing Protocols6.5.1. Routing Loops6.5.1.1. Maximum Hop Count6.5.1.2. Split Horizon6.5.1.3. Route Poisoning6.5.1.4. Holddowns6.6. Routing Information Protocol (RIP)6.6.1. RIP Timers6.6.2. Configuring RIP Routing6.6.2.1. Corp6.6.2.2. R16.6.2.3. R26.6.2.4. R36.6.2.5. 871W6.6.3. Verifying the RIP Routing Tables6.6.4. Configuring RIP Routing Example 26.6.5. Holding Down RIP Propagations6.6.6. RIP Version 2 (RIPv2)6.7. Interior Gateway Routing Protocol (IGRP)6.8. Verifying Your Configurations6.8.1. The show ip protocols Command6.8.1.1. Troubleshooting with the show ip protocols Command6.8.2. The debug ip rip Command6.8.2.1. Troubleshooting with the debug ip rip Command6.8.3. Enabling RIPv2 on Our Internetwork6.9. Summary6.10. Exam Essentials6.11. Written Lab 66.12. Hands-on Labs6.12.1. Hands-on Lab 6.1: Creating Static Routes6.12.2. Hands-on Lab 6.2: Configuring RIP Routing6.13. Review Questions6.14. Answers to Review Questions6.15. Answers to Written Lab 6
7. Layer 2 Switching
7.1. Before Layer 2 Switching7.2. Switching Services7.2.1. Limitations of Layer 2 Switching7.2.2. Bridging vs. LAN Switching7.2.3. Three Switch Functions at Layer 27.2.3.1. Address Learning7.2.3.2. Forward/Filter Decisions7.2.3.3. Port Security7.2.3.4. Loop Avoidance7.3. Spanning Tree Protocol (STP)7.3.1. Spanning Tree Terms7.3.1.1. Spanning-Tree Port States7.3.1.2. Convergence7.3.2. Cisco Catalyst Switches7.3.2.1. S17.3.2.2. S27.3.2.3. Core7.4. LAN Switch Types7.5. Summary7.6. Exam Essentials7.7. Written Lab 77.8. Review Questions7.9. Answers to Review Questions7.10. Answers to Written Lab 7
8. Wireless Technologies
8.1. Introducing Wireless Technology8.2. The 802.11 Standards8.2.1. 2.4GHz (802.11b)8.2.2. 2.4GHz (802.11g)8.2.3. 5GHz (802.11a)8.2.4. Comparing 802.118.2.5. 2.4GHz/5GHz (802.11n)8.3. Basic Service Sets8.3.1. BSS/IBSS8.3.2. ESS8.4. Wireless Security8.4.1. Open Access8.4.2. SSIDs, WEP, and MAC Address Authentication8.4.3. WPA or WPA 2 Pre-Shared Key8.5. Summary8.6. Exam Essentials8.7. Written Lab 88.8. Review Questions8.9. Answers to Review Questions8.10. Answers to Written Lab 8
9. Security
9.1. Introduction to Security9.1.1. Recognizing Security Threats9.1.2. Common Attack Profiles9.2. Mitigating Security Threats9.2.1. Mitigating Password, Router and Switch Attacks9.2.2. Switch Port Security9.2.2.1. MAC-Address Security9.2.2.2. Securing Unused Ports9.3. Virtual Private Networks9.4. Summary9.5. Exam Essentials9.6. Written Lab 99.7. Review Questions9.8. Answers to Review Questions9.9. Answers to Written Lab 9
10. Introduction to Wide Area Networks
10.1. Introduction to Wide Area Networks10.1.1. Defining WAN Terms10.1.2. WAN Connection Types10.1.3. WAN Support10.2. Cabling the Wide Area Network10.2.1. Serial Transmission10.2.2. Data Terminal Equipment and Data Communication Equipment10.3. High-Level Data-Link Control (HDLC) Protocol10.4. Point-to-Point Protocol (PPP)10.4.1. PPP Session Establishment10.4.2. PPP Authentication Methods10.4.3. Configuring PPP on Cisco Routers10.4.4. Configuring PPP Authentication10.4.5. Verifying PPP Encapsulation10.5. Summary10.6. Exam Essentials10.7. Written Lab 1010.8. Hands-on Labs10.8.1. Hands-on Lab 10.1: Configuring PPP Encapsulation and Authentication10.8.2. Hands-on Lab 10.2: Configuring and Monitoring HDLC10.9. Review Questions10.10. Answers to Review Questions10.11. Answers to Written Lab 10
A. About the Companion CD
A.1. What You'll Find on the CDA.1.1. Sybex Test EngineA.1.2. PDF of the BookA.1.3. Adobe ReaderA.1.4. Electronic FlashcardsA.2. System RequirementsA.3. Using the CDA.4. TroubleshootingA.4.1. Customer Care
Glossary

Content preview from CCENT: Cisco® Certified Entry Networking Technician Study Guide

Answers to Assessment Test

D. Each device has 10Mpbs to the server. See Chapter 1 for more information.
C. The command line console 0 places you at a prompt where you can then set your console user-mode password. See Chapter 4 for more information.
A. 256 − 192 = 64. 64 + 64 = 128. 128 + 64 = 192. The subnet is 128, the broadcast address is 191, and the valid host range is the numbers in between, or 129–190. See Chapter 3 for more information.
B. The passive command, short for passive-interface, stops regular updates from being sent out of an interface. However, the interface can still receive updates. See Chapter 6 for more information.
C. Internet Control Message Protocol (ICMP) is the protocol at the Network layer that is used to send echo requests ...

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