what is firewall?

Question

what is firewall what its features

Answer 1

It is a piece of hardware or software that prevents people and applications from accessing differeent parts of our puter. Windows already has one. A good free software one for vista is zone alarm and for xp try comodo

Answer 2

A firewall is a layer of protection on a network/computer. A firewall can do different functions depending on the type of firewall. Most common firewalls block IP traffic but some proxy firewalls can block actual web sites and file types.

HTH

Answer 3

A firewall is a hardware or software mediary that data must pass through to go in/out your computer. Your computer has its own firewall, routers can have firewalls, and servers can have firewalls. The point of a firewall is to limit who can send data to whom and on what ports. The firewall on your computer can also control which programs can access the internet and on which ports. Firewalls are important for disabling trojan horses, spyware, and other malicious software.

Answer 4

It's a piece of hardware or softwae that sits between you and the internet. It stops other internet users from gaining access to your computer. Most routers have a firewall built in as does Windows XP and Vista. You can also download a free firewall from http://www.zonelabs.com

Answer 5

Well a firewall Blocks unwanted activity of People acsessing your computer through the net and programs accsessing the internet.Differnt firewalls have different features,The one included with windows XP is pretty good and simple.

Answer 6

A firewall is a set of related programs, located at a network gateway server, that protects the resources of a private network from users from other networks. (The term also implies the security policy that is used with the programs.) An enterprise with an intranet that allows its workers access to the wider Internet installs a firewall to prevent outsiders from accessing its own private data resources and for controlling what outside resources its own users have access to.

heaps more definitions at the site below, hope this helps:)

Answer 7

http://computer.howstuffworks.com/firewall.htm

basically help protect computers from hackers trying to gain acess to your computer. Windows has a built it firewall. Good for home users but not that great for big businesses or even smaller ones.