100-140 Question 81
Single answerYou are troubleshooting a network connectivity issue in an office environment. The network uses Ethernet cables with RJ-45 connectors. During your investigation, you notice significant signal interference. Which type of cable would be the best choice to minimize interference in this situation?
- A
Unshielded Twisted Pair (UTP)
- B
Shielded Twisted Pair (STP)
- C
Fiber Optic Cable
- D
Coaxial Cable
Show answer and explanation
Correct answer: B
Explanation
RJ-45 connectors are most commonly used with twisted-pair cables like UTP and STP. In environments with high interference, STP cables are preferred due to their shielding, which mitigates the impact of electromagnetic interference. UTP cables, while widely used, lack shielding and are more vulnerable to interference. Fiber optic and coaxial cables are not applicable in this RJ-45 based Ethernet setup.
- A. Incorrect.
UTP cables are commonly used in Ethernet networks due to their cost-effectiveness, but they lack shielding, making them more susceptible to interference.
- B. Correct.
STP cables have shielding around the twisted pairs, which helps reduce interference, making them the best choice for environments with significant signal interference.
- C. Incorrect.
Fiber optic cables are immune to electromagnetic interference but are not relevant in this scenario since the network described uses RJ-45 connectors, which are incompatible with fiber optic cables.
- D. Incorrect.
Coaxial cables have good resistance to interference but are typically not used in modern Ethernet networks with RJ-45 connectors.