Question

question 1
with the use of unshielded twisted - pair copper wire in a network, what causes crosstalk within the cable pairs?

• the collision caused by two nodes trying to use the media simultaneously
• the use of braided wire to shield the adjacent wire pairs
• the reflection of the electrical wave back from the far end of the cable
• the magnetic field around the adjacent pairs of wire

Explanation:

Crosstalk in unshielded twisted - pair copper wire is due to electromagnetic interference. When current flows through a wire, it generates a magnetic field. Adjacent wire pairs can be affected by the magnetic field of nearby pairs, causing crosstalk. The first option is about network collisions, not crosstalk. The second option is about shielding which reduces crosstalk. The third option is about signal reflection, not crosstalk.

Answer:

D. the magnetic field around the adjacent pairs of wire