COMPUTER FUNDAMENTALS

Detailed explanation-1: -A Firewall is a network security device that monitors and filters incoming and outgoing network traffic based on an organization’s previously established security policies. At its most basic, a firewall is essentially the barrier that sits between a private internal network and the public Internet.

Detailed explanation-2: -Packet filtering. Packets are small amounts of data. When a firewall uses packet filtering, the packets attempting to enter the network are run against a group of filters. These filters remove the packets that match certain identified threats and allow the others through to their intended destination.

Detailed explanation-3: -In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. A firewall typically establishes a barrier between a trusted network and an untrusted network, such as the Internet.

Detailed explanation-4: -Explanation: Hardware firewalls are those firewalls that need to be connected as additional hardware between the device through which the internet is coming to the system and the network used for connecting to the internet.

Detailed explanation-5: -Network firewalls are security devices used to stop or mitigate unauthorized access to private networks connected to the Internet, especially intranets. The only traffic allowed on the network is defined via firewall policies-any other traffic attempting to access the network is blocked.