Networks : Eavesdropping

Which type of network media is least subject to eavesdropping?
1. Shielded twisted pair
2. >>Fiber optic
3. Coaxial
4. 802.11g
Explanation : Fiber optic networks are least prone to eavesdropping because the signal is carried though light pulses instead of by electromagnetic signal. This makes it extremely difficult to tap the wire.

802.11g wireless networks are extremely subject to eavesdropping if encryption is not used.
Coaxial is a copper wire cable. Transmission is through electromagnetic signals, so it is relatively easy to tap the wire and eavesdrop.

Shielded twisted pair is a copper wire cable. Transmission is through electromagnetic signals, so it is relatively easy to tap the wire and eavesdrop.
Objective: Networks

Networks: STP vs RG8 vs Fiber Optic

Which of the following cable types would you choose to network seven buildings on a university campus?
1. RG-58
2. >>STP
3. Multimode Fiber Optic
4. RG-8

Explanation : Multimode Fiber Optic cable offers the best solution as it can run 2,000 meters (6,560 feet) and is impervious to electrical grounds. This would be the best choice since seven buildings in a campus are likely separated by a good distance.

RG-8 and RG-58 are coaxial cables and are limited to five segments, so connecting seven buildings would be beyond their capability even if the distance was not a factor. RG-8 has a maximum cable length of 500 meters, while RG-58 is limited to 185 meters.

Shielded Twisted Pair (STP) cabling is limited to 100 meters and would not be able to reach all of the buildings on the campus.
Objective: Networks