Comptia Security Plus Mock Test Q4

Which of the following security devices can be replicated on a Linux based computer using IP tables to inspect and properly handle network based traffic?

A. Sniffer
B. Router
C. Firewall
D. Switch

Correct Answer: C
Section: Network Security

Explanation:
Ip tables are a user-space application program that allows a system administrator to configure the tables provided by the Linux kernel firewall and the chains and rules it stores.

Incorrect Answers:

A: A sniffer is a tool used in the process of monitoring the data that is transmitted across a network.

B, D: A router is connected to two or more data lines from different networks, whereas a network switch is connected to data lines from one single network. These may include a
firewall, but not by default.

References:
http://en.wikipedia.org/wiki/Iptables
Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis, 2014, p. 342
http://en.wikipedia.org/wiki/Router_(computing)