Scaling Large Internetworks
Answers to Review Questions
B, D, E. Routers, switches, and bridges are used to segment a net-
work and alleviate congestion on a network segment.
B, D, F. The Cisco three-layer model includes the Core,
Distribution, and Access layers.
F. An internetwork should be reliable, responsive, efficient, adaptable,
B. The Core layer should provide a fast transport between Distribu-
tion layer devices.
C. The Distribution layer connects Access layer devices together and
provides users with network service connections.
D. The Access layer is the connection point for users into the
D. LAN switches are Layer 2 devices that filter by hardware address
in a frame.
B. Bridges filter the network by using the hardware address in a frame
and create smaller collision domains.
D. Cut-through LAN switching begins forwarding the frame to the
destination device as soon as the destination hardware address is read
in the frame.
B. Microsegmentation is a term for breaking up collision domains into
A. The Distribution layer is responsible for connecting the Access
layer devices together and managing data flow to the Core layer.
B. If there is a failure in the core, every single user can be affected.
Therefore, fault tolerance at this layer is an issue.
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