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CCDA Self-Study: RIP, IGRP, and EIGRP Characteristics and Design

  • Sample Chapter is provided courtesy of Cisco Press.
  • Date: Dec 12, 2003.

Chapter Description

This sample chapter reviews distance-vector routing protocols, covers both versions of the Routing Information Protocol (RIP), and discusses the Cisco Interior Gateway Routing Protocol (IGRP) and Enhanced Interior Gateway Routing Protocol (EIGRP) — important knowledge for the CCDA.


As mentioned in the introduction, you have two choices for review questions. Some of the questions that follow give you a bigger challenge than the exam itself by using a short-answer question format. By reviewing now with more difficult question format, you can exercise your memory better and prove your conceptual and factual knowledge of this chapter. The answers to these questions appear in Appendix A.

For more practice with exam-like question formats, use the exam engine on the CD-ROM.

  1. True or false? RIPv2 broadcasts ( its routing table every 30 seconds.

  2. True or false? By default, EIGRP uses bandwidth, delay, reliability, and load to calculate the composite metric.

  3. True or false? EIGRP routers maintain neighbor adjacencies.

  4. True or false? EIGRP and RIPv2 support VLSMs and CIDR.

  5. True or false? RIPv2 does not have the 15-hop limit of RIPv1.

  6. RIP uses port .

  7. IGRP uses IP protocol number .

  8. EIGRP uses IP protocol number .

  9. Between RIP, IGRP, and EIGRP, which protocol would you recommend for use in a large network?

  10. Between RIPv2, IGRP, and EIGRP, which protocol would you use in a small network that has both Cisco and non-Cisco routers?

  11. Which protocol broadcasts its routing table every 90 seconds by default?

  12. Match the protocol with the characteristic:

  13. i. RIPv1

    ii. RIPv2

    iii. IGRP

    iv. EIGRP

    a. No VLSM or CIDR support; default update period of 90 seconds.

    b. VLSM and CIDR support; limited to 15 hops

    c. No VLSM or CIDR support; default update period of 30 seconds

    d. Uses triggered updates

  14. Why is EIGRP sometimes considered a hybrid protocol?

  15. True or False? IGRP is limited to 16 router hops.

  16. Which routing protocol can you use to exchange route updates with UNIX workstations running the routed process?

  17. Match the RIP routing table field with its description:

  18. i. IP address

    ii. Gateway

    iii. Interface

    iv. Metric

    v. Timer

    a. The number of hops to the destination

    b. Next router along the path to the destination

    c. Destination network or host, with subnet mask

    d. Used to access the physical network that must be used to reach the destination

    e. Time since the route entry was last updated

  19. Match the EIGRP component with its description:

  20. i. RTP

    ii. DUAL

    iii. Protocol-dependent modules

    iv. Neighbor discovery

    a. An interface between DUAL and IPX RIP, IGRP, and AppleTalk

    b. Used to deliver EIGRP messages reliably

    c. Builds an adjacency table

    d. Guarantees a loop-free network

  21. With Cisco routers, which protocols use only equal-cost load balancing?

  22. With Cisco routers, which protocols allow unequal-cost load balancing?

  23. Complete Table 12-6 with the VLSM, authentication, and administrative-distance capabilities of each routing protocol.

  24. Table 12-5 Distance Capabilities

    Routing Protocol



    Admin Distance

















    Use the Figure 12-7 to answer the following questions.

    Figure 7Figure 12-7 Path Selection

  25. By default, if RIPv2 is enabled on all routers, what path is taken?

  26. Path 1

  27. Path 2

  28. Unequal load balance with Path 1 and Path 2

  29. Equal load balance with Path 1 and Path 2

  30. By default, if IGRP is enabled on all routers, what path is taken?

  31. Path 1

  32. Path 2

  33. Unequal load balance with Path 1 and Path 2

  34. Equal load balance with Path 1 and Path 2

  35. By default, if EIGRP is enabled on all routers, what path is taken?

  36. Path 1

  37. Path 2

  38. Unequal load balance with Path 1 and Path 2

  39. Equal load balance with Path 1 and Path 2

  40. EIGRP is configured on the routers. If configured with the variance command, what path is taken?

  41. Path 1

  42. Path 2

  43. Unequal load balance with Path 1 and Path 2

  44. Equal load balance with Path 1 and Path 2

  45. By default, if RIPv1 is enabled on all routers, what path is taken?

  46. Path 1

  47. Path 2

  48. Unequal load balance with Path 1 and Path 2

  49. Equal load balance with Path 1 and Path 2

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