Which one of the following is the MOST solid defense against interception of a network
transmission?
A.
Frequency hopping
B.
Optical fiber
C.
Alternate routing
D.
Encryption
Explanation:
An alternative to conductor-based network cabling is fiber-optic cable. Fiber-optic
cables transmit pulses of light rather than electricity. This has the advantage of being extremely
fast and near impervious to tapping.
Pg 85 Tittel: CISSP Study Guide.
The question would have made more sense if it had said ‘physical solid defense’. As is, encryption is the correct answer. Optical fiber can be tapped into at all joints and cannot beat Rijndael..