Exam Prep Questions

Question 1 Which type of cable is the most susceptible to electromagnetic interference?
  • A. Coaxial cable

  • B. Fiber-optic cable

  • C. Unshielded twisted-pair

  • D. Shielded twisted-pair

A1: Answer C is correct. Unshielded twisted-pair cable is the correct answer. Although it is the most popular type of cable used for local area networking, it is subject to interference from adjacent cables and electrical equipment such as radio transmitting sources, motors, and power lines. Fiber-optic cable offers the highest protection from EMI sources, so answer B is incorrect. Coaxial cable and shielded twisted-pair cables offer greater immunity to interference than UTP but less than fiber-optic cable, so answers A and D are incorrect.
Question 2 ...

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