NET 222: Introduction to Routers and Routing

Review for Third Test
  1. What windows program do you use to access a router console in our lab?

  2. Why do we find the Cisco IOS on only some Cisco switches?

  3. What are the two standard RJ-45 ports labeled on a Cisco 2501 router? What can they both be used for? What specific use applies to one of them?

  4. If a Cisco 2600 router has a port for Ethernet 0/0, what kind of port should you expect it to be?

  5. When a Cisco router boots up it performs a POST. After it does, where will it look for a copy of the IOS? Where does a 2501 router run the IOS from? Where does a 2600 router run the IOS from?

  6. A router's configuration settings should be stored in NVRAM. What two names does the text use to refer to this collection of settings? If these settings are not stored in NVRAM, what happens when the router is started?

  7. What command do you enter to leave setup mode?

  8. What does the basic user mode prompt look like on a Cisco router? What does the basic privileged mode prompt look like?

  9. What is the command to enter privileged mode? What is the command to exit it?

  10. What is the command to set the enable secret password?

  11. If you only remember the first few letters of a command, how do you get the IOS to remind you of the correct word? How is this like the method to be prompted for command parameters?

  12. How do you display the last command entered on the command line? How do you display the last ten commands at once?

  13. How do you give a name to your router? How do you give a name to an interface?

  14. What are the five passwords the text tells us how to set? Why would you only need to remember four of them?

  15. What command would delete the saved configuration? What command saves the currently loaded configuration?

  16. What command shows the status of a particular interface? What command shows the status of all interfaces?

  17. What does it mean if an interface's line protocol is down? What if the interface and the line protocol are down? What command can the administrator use to take down an interface? What command brings it back up?

  18. What command will tell you if an interface is connected to DTE or DCE equipment? Why do you care?

  19. Give a brief definition of routing.

  20. What is a neighbor router? What is a remote network?

  21. Assume a workstation is attempting to contact a web server on another network. What addresses are written in the Network layer of the outgoing message? What addresses are written in the Data Link layer of the outgoing message?

  22. Why is static routing not practical for large networks? Explain the parts of a command that create a static route.

  23. What is Administrative Distance? What is the default AD for a directly connected network? What is the default AD for a static route?

  24. How do you use the default-route command? What is the AD of a default-route?

  25. What is the difference between routing protocols and routed protocols?

  26. The chapter discusses RIP and IGRP. Are they Distance Vector or Link State protocols?

  27. What is the count to infinity problem? Why does it exist? What do we mean by "infinity"?

  28. What series of commands enables RIP on a router? What must you do to use RIPv2 instead?

  29. What will the command show ip route do? What do these letters mean at the start each line of its output?
    • C
    • I
    • R
    • S

  30. How does RIP evaluate whether a new route is better than one it already has to the same network? How many routes to the same network does RIP keep in a routing table? What must be true about them? What could happen that would cause the router to dump all of them?

  31. What is an advantage to using RIPv2 instead of RIP?

  32. Compare the limit on hops in RIP to the limit in IGRP.

  33. What is the command to start IGRP on a router? How is it different from starting RIP?

  34. How does IGRP evaluate whether one route is better than another? How many routes to the same network can an IGRP router keep in its routing table? Must they be similar in the same way that simultaneous routes in RIP must be?

  35. What timers does IGRP have in common with RIP? How are the default timings different for the most basic ones?