FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -They work in a similar fashion to packet-filtering firewalls, but they operate at the transport and session layers of the OSI model. A firewall configuration used to secure hosts on a network segment. In most cases, they are connected behind a firewall that is connected to a public network like the Internet.

Detailed explanation-2: -The Second Generation: Unified Threat Management UTM firewalls generally combine firewall, gateway antivirus, and intrusion detection and prevention capabilities into a single platform.

Detailed explanation-3: -These second generation firewalls had the same capabilities as packet filter firewalls, but they monitored and stored the session and connection state. They associated related packets in a flow based on source and destination IP addresses, source and destina-tion ports, and the protocol used.

Detailed explanation-4: -In the basic form, packet filters operate at Layer 3 (Network) of the Open Systems Interconnect (OSI) model. This provides network access control based upon information contained in the packet.

Detailed explanation-5: -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.