CompTIA Security Plus Mock Test Q164

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.

Correct Answer: B
Section: Network Security

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

Incorrect Answers:
A, D: The SSID is still used as a unique identifier for a wireless LAN. It is therefore still valid for authentication, and also still supported in 802.11 protocols.
C: Devices which are configured to connect to a network which does not broadcast its SSID may try to connect to the network by broadcasting for the network. This results in the SSID
being revealed to wireless snoopers in the vicinity of the device. It is not included by default.

References:
Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, p. 61
http://en.wikipedia.org/wiki/Service_set_(802.11_network)