Answers to Review Questions
61
Answers to Review Questions
1.
A, C. Link-state does not send entire routing table updates like dis-
tance-vector does. Link-state uses Hello messages to make sure that
neighbor routers are still alive, and then when a change in the network
does occur, it sends only the necessary information about the change.
2.
B, C. IGRP and RIP are distance-vector protocols and do not use a
topology table.
3.
C. RIPv2 is still distance-vector and acts accordingly. However, it
sends prefix routing information in the route updates so that it can
support VLSM.
4.
A. Directly connected routes have an administrative distance of zero.
5.
A, B, C, D. Although EIGRP is really a hybrid routing
protocol, it is considered an advanced distance-vector protocol.
6.
E. OSPF has an administrative distance of 110.
7.
C. Classless routing protocols send prefix routing information with
each update.
8.
C. EIGRP routes have a default administrative distance
of 90.
9.
D. Classful routing protocols send no subnet mask information with
the routing updates, so all devices on the network must use the same
subnet mask.
10.
B. Static routes have a default administrative distance of 1.
11.
B, D, E, F. RIPv2, EIGRP, IS-IS, and OSPF all send prefix routing
information with the route updates.
12.
D. IGRP routes have a default administrative distance of 100.
13.
A, B. Both RIP and RIPv2 consider only hop count as a metric.
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