FIREWALL (Preventive Wall) Firewall is a system designed to - TopicsExpress



          

FIREWALL (Preventive Wall) Firewall is a system designed to regulate the inbound and outbound traffic from a network. The internet poses the biggest threat and for this reason many operating systems come with built in firewall for added protection. Many routers also have firewalls with routing capabilities. All packets of data are analyzed and allowed through based on certain predefined rules. Firewall cans be hardware based or software based. Firewall technologies were created in 1980s. The term firewall was taken from fire fighting where a firewall was a structure used to prevent a fire from spreading. There are 4 types of firewall techniques namely Packet Filter, Application Gateway, Circuit Level Gateway and Proxy Server. Usually a combination of two or more of these techniques is used to built a firewall.
Posted on: Sat, 15 Mar 2014 09:07:11 +0000

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