FUNDAMENTALS OF COMPUTER

Detailed explanation-1: -Circuit-level gateways operate on the session level (layer 5). These firewalls check for functional packets in an attempted connection, and-if operating well-will permit a persistent open connection between the two networks.

Detailed explanation-2: -A circuit-level gateway is a type of firewall. Circuit-level gateways work at the session layer of the OSI model, or as a “shim-layer” between the application layer and the transport layer of the TCP/IP stack.

Detailed explanation-3: -Explanation: Hardware firewalls are those firewalls that need to be connected as additional hardware between the device through which the internet is coming to the system and the network used for connecting to the internet.

Detailed explanation-4: -Session layer firewalls are also known as Circuit level firewalls or circuit gateways. These session layer firewalls have the following features; they operate at the TCP layer of the OSI model.

Detailed explanation-5: -The packet filtering firewall filters IP packets based on source and destination IP address, and source and destination port. The packet filter may lack logging facilities, which would make it impractical for an organization that has compliance and reporting requirements to which they must adhere.