FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Today, NAT is used to hide networks (called network masquerading) or to hide IP (called IP masquerading). Masquerading is the mechanism that hides an entire address space, usually consisting of private network addresses (RFC 1918), behind a single IP address usually in the public domain address space.

Detailed explanation-2: -Masquerade NAT is used to allow your private network to hide behind, as well as be represented by, the address bound to the public interface.

Detailed explanation-3: -A web application firewall (WAF) is a firewall that monitors, filters and blocks data packets as they travel to and from a website or web application. A WAF can be either network-based, host-based or cloud-based and is often deployed through a reverse proxy and placed in front of one or more websites or applications.

Detailed explanation-4: -Packet filter firewalls are less secure than application level firewalls because the packet filtering firewalls do not understand application layer protocols. Packet filtering firewalls cannot restrict access to protocol subsets for even the most basic services such as the PUT and GET commands in FTP.

Detailed explanation-5: -It filters traffic based on state, port, and protocol, along with administrator-defined rules and context. This involves using data from prior connections and packets from the same connection. Most firewalls rely on stateful packet inspection to keep track of all internal traffic.