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Cisco Exams Tutorial Types of Networks

Routers perform which of the following functions? (Select three)

A. Packet switching
B. Collision prevention on a LAN segment.
C. Packet filtering
D. Broadcast domain enlargement
E. Broadcast forwarding
F. Internetwork communication

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Answer: A, C, F

Explanation:

A. Routers work in Layer 3 of the OSI Model. A major function of the router is to route
packets between networks.
C. Through the use of access lists, routers can permit and deny traffic using layer 3 and
layer 4 packet information.
F. The primary purpose of a router is to route traffic between different networks,
allowing for internetworking.
Incorrect Answers:
B. While routers can be used to segment LANs, which will reduce the amount of
collision: it can not prevent all collisions from occurring. As long as there as are 2 or more
devices on a LAN segment, the possibility of a collision exists, whether a router is used
or not.
D. The broadcast domain of a LAN is often segmented through the use of a router. This
results in reducing the size of the broadcast domain.
E. Routers do not forward broadcast traffic.