Business Terms and Jargon Explained

What is Firewall

A Firewall is a device or software package that provides a secure gateway between two networks. Some network devices such as routers have firewalls built in. There are also 'personal firewalls' that do the same job but only protect one system (such as a laptop or PC).

Firewalls ensure that certain network traffic (e.g. from certain applications) is allowed to pass from one network to another according to a set security policy. Firewalls can prevent network-based attacks that are often targeted against systems.

Firewalls can log connection attempts and traffic and authenticate users trying to make network connections. They can inspect network packets, e-mail viruses and web pages, and track the state of connections to ensure they are behaving as expected. Firewalls also protect internal networks by performing Network Address Translation (NAT). Firewalls fall into three main types: Stateful Inspection, Application Proxy or Packet Filtering.

Crown Copyright. Material taken from the DTI - Department for Trade and Industry. Reproduced under the terms and conditions of the Click-Use Licence.

<- Go Back
Business Terms Home page

Search Jargon and Terms Database

A   B   C   D   E   F   G   H   I   J   K   L   M   N   O   P   Q   R   S   T   U   V   W   X   Y   Z


Search Term   

Comparative Advantage Specified Supplies In terrorem
Tangible Assets Takeover Gross
Hedging Billing AVC
Accounting reference date IOU Ingot
Competitive Advantage World Intellectual Property Office Arrangement Fee
Insider selling Spam Arbitrage
Act Buy-in Publicist
Offshore Investments Cable Modem Jus naturale
Average Total Cost (ATC) Third Country De novo
Intrastat Bandwidth Subsidiary
Revenue Trader Financial equity Quaere
Risk Hardening - Systems Zero Growth
Standard terms and conditions Venire Advertising Standards Authority

Term created / updated 2007-02-26 11:47:15

Knowledge is the key to success. That is why we have gone to great lengths to get you these business terms and jargon, and explain them in Plain English. Its very easy to comprehend. Learn to understanding and know your business jargon. This will keep you informed among your peers. Bookmark Your business dictionary.

Copyright © 2004-2020 Scopulus Limited. All rights reserved.