A) Unauthorized Attacks
B) Vishing
C) External resources
D) Data Driven Attacks
E) Phishing
Correct Answer: A
Solution :
[a] A firewall is a system designed to prevent unauthorised access to or from a private computer network. It acts as a barrier between a trusted network and an untrusted network. A firewall controls access to the resources of a network through a positive control model.
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