Question

Firewalls are used to protect from

A) erroneous internal handling of data.
B) insufficient documentation of transactions.
C) illogical programming commands.
D) unauthorized external users.

Answer 1

Firewalls are used to protect against unauthorized external users by acting as a barrier between a private network and the public internet.

Step-by-step explanation:

Firewalls are used to protect against unauthorized external users. They act as a barrier between a private network and the public internet, monitoring and controlling incoming and outgoing network traffic. Firewalls can be hardware or software-based, and they use various techniques such as packet filtering, stateful inspection, and application-level gateways to prevent unauthorized access to a network.