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Firewall is a device that filters access to the protected network from the outside network. Firewalls can filter the packets on the basis of

(A) Source IP Address

(B) Destination IP Address

(C) TCP Source Port

(D) UDP Source Port

(E) TCP Destination Port

Choose the correct answer from the options given below:


1. (A), (B) and (C) only
2. (B) and (E) only
3. (C) and (D) only
4. (A), (B), (C), (D) and (E) only

1 Answer

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Best answer
Correct Answer - Option 4 : (A), (B), (C), (D) and (E) only

The correct answer is option 4.

Network layer Firewall can filter on Source And Destination IP address, Source and Destination Port no for both TCP and UDP packet.

Hence the correct answer is (A), (B), (C), (D), and (E) only.​

What is a Firewall?

            A firewall is a form of cybersecurity device that filters network traffic. Network nodes can be separated from external traffic sources, internal traffic sources, or even individual applications using firewalls.

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