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This chapter is from the book

Review Questions

Use this chapter and your practical troubleshooting knowledge and skills to answer the following questions. The answers are located in Appendix A, "Answers to Review Questions."

  1. In the RIP scenario, why were you successful with using RIPv2 rather than RIPv1?

  2. A Cisco router maintains ARP entries much longer than most PCs. How can you remove all entries from the ARP cache on a Cisco router? It would be less detrimental to all to just remove an entry associated with a given interface. Can you do that on a router? On a Windows-based PC?

  3. Draw a table comparing TCP/IP layers, protocols, applications, and utilities to the OSI model.

  4. On a Cisco router, show ip route displays the routing table. What are the numbers in brackets []?

  5. Subnetting, aggregation, VLSM, CIDR, supernetting, and summarization are all about moving bit boundaries. Which one(s) move the network mask bit boundary to the right?

  6. Assume you moved into apartment (host address) located at 172.16 Broad Creek Drive (network address). Other floors in the apartment building are numbered,, and What floor (subnet) are you on? What are all the available hosts on that subnet? What is the directed broadcast address of your subnet?

  7. Compare the protocol and port numbers for telnet, RIP, FTP, and TFTP.

  8. You can ping by the IP address but not by the hostname. What is a very likely problem?

  9. You need to forward DHCP requests to another subnet, but you do not want to forward NetBIOS communications. Is this possible?

  10. What IOS command enables you to verify that RIP sends broadcast routing updates? To what address are broadcast updates sent?

  11. Using, address the network according to the following requirements: three LAN segments—one with 125 hosts, one with 50 hosts, and one with 25 hosts—and at least two and maybe more WAN segments.

  12. You are having a problem with three subnets connected via two Cisco routers. Each router can ping its own interfaces but can't get to the far side of the other router. So you decide to put in the appropriate default route statement, but things still are not operational. You are not running routing protocols because default routes serve this scenario well. Can you spot the issue?

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