CompTIA Security+ Question E-54

While previously recommended as a security measure, disabling SSID broadcast is not effective against most attackers because network SSIDs are:

A. no longer used to authenticate to most wireless networks.
B. contained in certain wireless packets in plaintext.
C. contained in all wireless broadcast packets by default.
D. no longer supported in 802.11 protocols.

Answer: B

The SSID is still required for directing packets to and from the base station, so it can be discovered using a wireless packet sniffer.