FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -By default, the firewall prevents all traffic from a lower security zone to a higher security zone (commonly known as Inbound) and allows all traffic from a higher security zone to a lower security zone (commonly known as Outbound).

Detailed explanation-2: -Its purpose is to block malicious traffic like viruses, malware, and hackers, and is the first line of security defense for your network. Firewalls can be physical devices, or a software program running on servers or workstations.

Detailed explanation-3: -While a packet filtering firewall only examines an individual packet out of context, a stateful firewall is able to watch the traffic over a given connection, generally defined by the source and destination IP addresses, the ports being used, and the already existing network traffic.

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.