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CompTIA Network+ Study Guide: Exam N10-007

You're reading from   CompTIA Network+ Study Guide: Exam N10-007 Todd Lammle's bestselling CompTIA Network+ Study Guide for the N10-007 exam!

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Product type Paperback
Published in May 2018
Publisher Wiley
ISBN-13 9781119432258
Length 1008 pages
Edition 4th Edition
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Author (1):
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Todd Lammle Todd Lammle
Author Profile Icon Todd Lammle
Todd Lammle
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Table of Contents (27) Chapters Close

1. Introduction FREE CHAPTER 2. Chapter 1: Introduction to Networks 3. Chapter 2: The Open Systems Interconnection Specifications 4. Chapter 3: Networking Topologies, Connectors, and Wiring Standards 5. Chapter 4: The Current Ethernet Specifications 6. Chapter 5: Networking Devices 7. Chapter 6: Introduction to the Internet Protocol 8. Chapter 7: IP Addressing 9. Chapter 8: IP Subnetting, Troubleshooting IP, and Introduction to NAT 10. Chapter 9: Introduction to IP Routing 11. Chapter 10: Routing Protocols 12. Chapter 11: Switching and Virtual LANs 13. Chapter 12: Wireless Networking 14. Chapter 13: Authentication and Access Control 15. Chapter 14: Network Threats and Mitigation 16. Chapter 15: Physical Security and Risk 17. Chapter 16: Wide Area Networks 18. Chapter 17: Troubleshooting Tools 19. Chapter 18: Software and Hardware Tools 20. Chapter 19: Network Troubleshooting 21. Chapter 20: Management, Monitoring, and Optimization 22. Index
23. Advert
24. EULA
Appendix A: Answers to Written Labs
1. Appendix B: Answers to Review Questions
2. Appendix C: Subnetting Class A

High Availability

First hop redundancy protocols (FHRPs) work by giving you a way to configure more than one physical router to appear as if they were only a single logical one. This makes client configuration and communication easier because you can simply configure a single default gateway and the host machine can use its standard protocols to communicate. First hop is a reference to the default router being the first router, or first router hop, through which a packet must pass.

So how does a redundancy protocol accomplish this? The protocols I’m going to describe to you do this basically by presenting a virtual router to all of the clients. The virtual router has its own IP and MAC addresses. The virtual IP address is the address that’s configured on each of the host machines as the default gateway. The virtual MAC address is the address that will be returned when an ARP request is sent by a host. The hosts don’t know or care which physical router is actually...

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