Computer-Networks
August 29, 2024Computer-Networks
August 29, 2024Computer-Networks
| Question 390 |
Consider the following statement.
I. Packet filter firewall analyzes network traffic at transport layer.
II. Circuit level firewall operate transport and session layer of OSI model.
From the above statement which statement/s is/are TRUE?
| Only I | |
| Only II | |
| None | |
| I and II
|
Question 390 Explanation:
The first firewalls were packet-filtering firewalls that work at the Network layer of the OSI networking model. They examine the packet headers that contain IP addresses and packet options and block or allow traffic through the firewall based on that information.
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. They monitor TCP handshaking between packets to determine whether a requested session is legitimate.
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. They monitor TCP handshaking between packets to determine whether a requested session is legitimate.
Correct Answer: B
Question 390 Explanation:
The first firewalls were packet-filtering firewalls that work at the Network layer of the OSI networking model. They examine the packet headers that contain IP addresses and packet options and block or allow traffic through the firewall based on that information.
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. They monitor TCP handshaking between packets to determine whether a requested session is legitimate.
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. They monitor TCP handshaking between packets to determine whether a requested session is legitimate.
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