Which of the following statements about firewall is correct?
A.
A network transmission system that increases the speed of incoming and outgoing network traffic
B.
A network security system that establishes a barrier between a trusted internal network and an untrusted external network such as the Internet
C.
A data structure that improves the speed of data retrieval operations on a database table
D.
A data structure created using only two rows of a database table used to uniquely identify each record
Correct Answer: Option B
Explanation
A firewall is a network security system that establishes a barrier between a trusted internal network and an untrusted external network such as the Internet.
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