Chapter 20

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page 505
Isaac Farias
Quiz by Isaac Farias, updated more than 1 year ago
Isaac Farias
Created by Isaac Farias over 8 years ago
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Resource summary

Question 1

Question
1. Which of the following distance vector features prevents routing loops by causing the routing protocol to advertise only a subset of known routes, as opposed to the full routing table, under normal stable conditions?
Answer
  • a. Route poisoning
  • b. Dijkstra SPF
  • c. Hello
  • d. Split horizon

Question 2

Question
2. Which of the following distance vector features prevents routing loops by advertising an infinite metric route when a route fails?
Answer
  • a. Dijkstra SPF
  • b. Hello
  • c. Split horizon
  • d. Route poisoning

Question 3

Question
3. Which of the following is true about both RIPv1 and RIPv2? (Choose two answers.)
Answer
  • a. Uses a hop-count metric
  • b. Sends update messages to multicast address 224.0.0.9
  • c. Supports authentication
  • d. Uses split horizon

Question 4

Question
4. Router R1 uses RIPv1, and learns one possible route to reach subnet 10.1.1.0/24. That route would have a metric of 15 from R1’s perspective. Which of the following is true?
Answer
  • a. R1 cannot use the route, because metric 15 is considered to be infinity
  • b. R1 will add the route to its routing table
  • c. The cumulative bandwidth between R1 and subnet 10.1.1.0/24 is 15 Mbps
  • d. The slowest bandwidth of the links between R1 and subnet 10.1.1.0/24 is 15 Kbps.

Question 5

Question
5. Routers A and B use EIGRP. How does router A watch for the status of router B so that router A can react if router B fails?
Answer
  • a. By using EIGRP hello messages, with A needing to receive periodic hello messages to believe B is still working
  • b. By using EIGRP update messages, with A needing to receive periodic update messages to believe B is still working
  • c. Using a periodic ping of B’s IP address based on the EIGRP neighbor timer
  • d. None of the other answers are correct.

Question 6

Question
6. Which of the following affect the calculation of EIGRP metrics when all possible default values are used? (Choose two answers.)
Answer
  • a. Bandwidth
  • b. Delay
  • c. Load
  • d. Reliability
  • e. Hop count

Question 7

Question
7. Which of the following routing protocols are considered to use link-state logic?
Answer
  • a. RIPv1
  • b. RIPv2
  • c. EIGRP
  • d. OSPF

Question 8

Question
8. Which of the following is true about how a router using a link-state routing protocol chooses the best route to reach a subnet?
Answer
  • a. The router finds the best route in the link-state database.
  • b. The router calculates the best route by running the SPF algorithm against the information in the link-state database.
  • c. The router compares the metrics listed for that subnet in the updates received from each neighbor and picks the best (lowest) metric route.
  • d. The router uses the path that has the lowest hop count.
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