CompTIA® A+ 220-801 and 220-802 Exam Cram, Sixth Edition (Shawn Kahl's Library) by David L. Prowse

Author:David L. Prowse
Language: eng
Format: epub
Publisher: Pearson IT Certification
Published: 2013-09-28T16:00:00+00:00

Firewall

A firewall is any hardware appliance or software application that protects a computer from unwanted intrusion. In the networking world we are more concerned with hardware-based devices that protect an entire group of computers such as a LAN. When it comes to small offices and home offices firewall functionality is usually built into the router. In larger organizations it is a separate device. The firewall stops unwanted connections from the outside and can block basic networking attacks.

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