How do you distinguish between a bridge and a router?

A.
A bridge simply connects multiple networks, a router examines each packet to determine which network to
forward it to.

B.
“Bridge” and “router” are synonyms for equipment used to join two networks.

C.
The bridge is a specific type of router used to connect a LAN to the global Internet.

D.
The bridge connects multiple networks at the data link layer, while router connects multiple networks at the
network layer.

Explanation:
Bridges and routers both connect networks. While bridges works only up to the data link layer, routers work at
the network layer.
Incorrect Answers:
A: Both bridges and routers connect multiple networks. A router examines each packet to determine which
network to forward it, but bridges can also examine packets by using filters to determine if the data should be
forwarded or not.
B: Bridge and router are not synonyms as they work at different network layers.
C: A bridge is not one type of router. A bridge cannot connect a LAN to the Internet as it only working at the
data link layer, and you need to work at the network layer to connect a LAN to the Internet.

Harris, Shon, All In One CISSP Exam Guide, 6th Edition, McGraw-Hill, New York, 2013, p. 615