Teaching UGC NET Mock Test Series 2025 (Paper 1 & 2) Computer Networks Concept of Layering Network Layer
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