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162 Chapter 3 • Communication Security: Remote Access and Messaging

ones (Windows 2000/XP,Windows Vista and Server2003) can use both.There
are PPTP and L2TP client implementations for Linux and Macintosh, as well.
On the server side, if users have the option of using both PPTP and L2TP, it’s
always safer to go with both because of the OS limitations.

Q: Which is better, S/MIME or PGP?

A: Functionally, they are about the same. However, PGP seems to get more “press”
and has become more popular because of it. It is not always a matter of “which
is better” as much as it is “which one is more widely used.”This is because both
the sender and the recipient of an encrypted message must have compatible
software in order for the recipient to be able to decrypt the encrypted mes-
sages.

Self Test

A Quick Answer Key follows the Self Test questions. For complete questions,
answers, and explanations to the Self Test questions in this chapter as well as
the other chapters in this book, see the Self Test Appendix.

1. The use of VPNs and __________________ have enabled users to be able to
telecommute.

A. PGP
B. S/MIME
C. Wireless NICs

D. RASs

2. PDAs, cell phones, and certain network cards have the ability to use
_____________ networks. Choose the BEST answer.
A. Wired
B. Private

C. Wireless
D. Antique

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