Answers to Review Questions
27
13.
C. Bridges use the hardware address in a frame to filter a network.
14.
A, B, E. Routers use logical network addresses. IP and IPX are exam-
ples of logical network addresses.
15.
C. Switches, like bridges, use hardware addresses in a frame to filter
the network.
16.
C. Both switches and bridges break up collision domains but are one
large broadcast domain by default. All broadcasts are forwarded to all
network segments with a bridge or switch.
17.
A. Route summarization is used to send fewer route entries in an
update. This can reduce the routing table entries.
18.
A, B, C, E, F. Access lists, snapshot routing, compression techniques,
Dial-on-Demand Routing (DDR), and incremental updates all can
help reduce bandwidth usage.
19.
C, D, E, F. Alternate path routing, which provides redundancy and
load balancing, along with snapshot routing, tunneling, and dial backup,
all provide stability and availability in an internetwork.
20.
D. The Access layer is responsible for breaking up collision domains.
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