Which of the following devices can be used to connect two similar network segments but keeps
network traffic separate on the two segments?

A.
Modem

B.
Switch

C.
Gateway

D.
Bridge

Explanation:
A bridge connects two similar network segments together but keeps traffic separated on both
sides of the bridge. Traffic is only allowed to pass through the bridge if it is intended for a host on
the other side of the bridge.
Incorrect Answers:
A: A modem modulates digital data onto an analog carrier for transmission over the internet and
demodulates from the analog carrier to a digital signal at the receiving end. B: A switch connects
multiple segments of a network together.
C: A gateway is any hardware and software combination that connects dissimilar network
environments.References:David Groth and Dan Newland, A+ Complete Study Guide (2nd
Edition), Sybex, Alameda CA, 2002, pp. 332-334.David Groth and Toby Skandier, Network+ Study

Guide (4th Edition), Sybex, Alameda CA, 2005, pp. 32-34.