While studying the basics of computer and network security , you will come across many new terms encryption, port, trojan, and others. Firewall is the term that will come up most often. What is a firewall? A firewall is a technological barrier designed to prevent unauthorized or unwanted communication between computer networks or hosts. The main purpose of a firewall is to keep unwanted guests users out of your network.
A firewall can be a hardware device or a software application that is usually located at the perimeter of a network to protect all incoming and outgoing traffic. to determine which traffic Whatsapp Mobile Number List should be allowed on or off your private network. Depending on the type of firewall you use, you can restrict access to only specific IP addresses and domain names, or block certain types of traffic by blocking the TCP IP ports they use.
How does a firewall work? There are four main mechanisms that firewalls use to restrict traffic. To provide stronger security, a single device or application can use more than one mechanism. The four mechanisms are Packet Filtering, Link Level Gateway, Proxy Server, and Application Gateway. Packet filtering The packet filter captures all traffic in and out of the network and evaluates it according to the rules you provide.