QUESTIONS AND ANSWERS
1. How does Split Horizon work?
A: A router does not advertise a route back in the direction from which it was
received.
2. How does Poison Reverse work?
A: A router advertises a route as unreachable in the direction from which it was
received.
3. What type of routing protocol maintains neighbors?
A: Link State.
4. When does a distance vector send out routing table updates?
A: At a scheduled time interval.
5. What are the most common Link State routing protocols?
A: OSPF, NLSP, and IS-IS.
6. What type of routing protocol is EIGRP?
A: Hybrid.
7. What is the command to send all traffic destined for 10.2.2.0/24 to router
10.1.1.1/24?
A: ip route 10.2.2.0 255.255.255.0 10.1.1.1
8. What command can be added to a static route to make sure it stays in the routing
table even if its associated interface goes down?
A: permanent
9. What is the administrative distance of OSPF?
A: 110
10. What is the range of values for administrative distance?
A: 0–255
1. How does Split Horizon work?
A: A router does not advertise a route back in the direction from which it was
received.
2. How does Poison Reverse work?
A: A router advertises a route as unreachable in the direction from which it was
received.
3. What type of routing protocol maintains neighbors?
A: Link State.
4. When does a distance vector send out routing table updates?
A: At a scheduled time interval.
5. What are the most common Link State routing protocols?
A: OSPF, NLSP, and IS-IS.
6. What type of routing protocol is EIGRP?
A: Hybrid.
7. What is the command to send all traffic destined for 10.2.2.0/24 to router
10.1.1.1/24?
A: ip route 10.2.2.0 255.255.255.0 10.1.1.1
8. What command can be added to a static route to make sure it stays in the routing
table even if its associated interface goes down?
A: permanent
9. What is the administrative distance of OSPF?
A: 110
10. What is the range of values for administrative distance?
A: 0–255
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