COMPUTER NETWORKING

Detailed explanation-1: -Packet filtering firewalls are the oldest, most basic type of firewalls. Operating at the network layer, they check a data packet for its source IP and destination IP, the protocol, source port, and destination port against predefined rules to determine whether to pass or discard the packet.

Detailed explanation-2: -Stateful inspection firewall State-aware devices not only examine each packet, but also keep track of whether or not that packet is part of an established TCP or other network session.

Detailed explanation-3: -The packet filtering firewall filters IP packets based on source and destination IP address, and source and destination port.

Detailed explanation-4: -Stateful Inspection Firewalls A stateful inspection firewall (or dynamic packet-filtering firewall) monitors incoming and outgoing packets at the network and transport layers. This firewall type combines packet inspection and TCP handshake verification.

Detailed explanation-5: -Stateful inspection, also known as dynamic packet filtering, is a firewall technology that monitors the state of active connections and uses this information to determine which network packets to allow through the firewall.