Question

a packet analyzer is called a sniffer because...
a. it starts a denial-of-service attack.
b. it detects high-speed transmissions.
c. it captures and reads data inside each packet.
d. it filters out spam.

Explanation:

A packet analyzer ("sniffer") is named for its function of capturing network packets and examining their contents. Option A is incorrect (it doesn’t initiate DoS attacks), B is irrelevant (speed detection isn’t its core role), D is wrong (spam filtering is not its purpose). Only C describes its defining action.

Answer:

C. it captures and reads data inside each packet.