COMPUTER NETWORKS AND COMMUNICATIONS
NETWORK SECURITY AND CYBERSECURITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Application layer
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Session layer
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Presentation layer
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Network layer
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Detailed explanation-1: -Circuit-level gateway firewalls are installed in layer of OSI model. Explanation: In the session layer (which is the fifth layer) of the OSI model, circuit-level gateway firewalls are deployed for monitoring TCP sessions for 3-way handshakes.
Detailed explanation-2: -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: -–Circuit-level proxy Operates at the Session Layer of the OSI Model and makes access decisions based on address, port and protocol type, and not on the packet content. This firewall creates a circuit between the client computer and the server.
Detailed explanation-4: -The gateway operates at the network layer (Layer 3) of the OSI Model. The gateway is used when transmitting packets. When packets are sent over a network, the destination IP address is examined.
Detailed explanation-5: -A circuit-level gateway is a firewall that offers control over network traffic predominantly in the session layer. It delivers security for TCP and UDP networks by verifying packets and connection requests on a virtual circuit between two transport layers.