FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -A packet filtering firewall is a network security technique that regulates data flow to and from a network. It is a security mechanism that allows packets to move across networks while controlling their flow through the use of a set of rules, protocols, IP addresses, and ports.

Detailed explanation-2: -packet filtering firewall. circuit-level gateway. application-level gateway (aka proxy firewall) stateful inspection firewall.

Detailed explanation-3: -There are three types of firewalls based on how you decide to deploy them: hardware, software, and cloud-based firewalls.

Detailed explanation-4: -A packet filtering firewall is the most basic type of firewall that controls data flow to and from a network. It is a network security solution that allows network packets to move across between networks and controls their flow using a set of user-defined rules, IP addresses, ports, and protocols.