Which of the following has serious security implications for large organizations and can potentially allow
an attacker to capture conversations?

A.
Subnetting

B.
NAT

C.
Jabber

D.
DMZ

Explanation:
Jabber is a new unified communications application and could possible expose you to attackers that want
to capture conversations because Jabber provides a single interface across presence, instant messaging,
voice, video messaging, desktop sharing and conferencing.
Incorrect Answers:
A: Subnetting means that you make use of a subnet mask value to divide a network into smaller
components. In essence this gives you more networks, but a smaller number of hosts available on each,
thus making your network more secure and manageable.
B: Network Address Translation is meant to extend the number of usable internet addresses sin that it
allows a company to present a single address to the Internet for all computer connections. But NAT also
acts a a fire wall and effectively hides your network from the world.
D: A DMZ (demilitarized zone) is an area in a network that allows restrictive access to untrusted users and
isolates the internal network from access by external users and systems. It does so by using routers and
firewalls to limit access to sensitive network resources.

http://www.cisco.com/web/about/ac49/ac0/ac1/ac258/JabberInc.html
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis,
2014, pp. 87-88, 93