FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -There are two types of firewalls based on what they protect: network-based and host-based. Network-based firewalls, which are frequently hardware, protect entire networks. Host-based firewalls, which are frequently software, protect individual devices known as hosts.

Detailed explanation-2: -Stateful firewalls intercept packets at the network layer and then derive and analyze data from all communication layers to improve security. Information about connection state and other contextual data is stored and dynamically updated. This provides valuable context when evaluating future communication attempts.

Detailed explanation-3: -A stateless firewall does not keep data about the data streams and connections in the system. So, it evaluates each packet incoming/outgoing the system as a particular and independent element. A stateful firewall, however, keeps the information about streams and connections, employing it to evaluate each packet.

Detailed explanation-4: -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.