Which of the following RJ-45 cable types is used to connect a PC’s COM port to a router or a switch console port?
  1. Rollover cable
  2. Straight through cable
  3. Crossover cable
  4. Crossover with a CSU/DSU
Explanation
Answer: A - Rollover cable is used to connect a PC’s COM port to a router or a switch.

Key Takeaway: Rollover cable is a null-modem cable that is most commonly used to connect a computer terminal to a router’s or switch’s console port. It is typically flat, mostly with a light blue color. The pin outs on one end are reversed from the other, as if the wire had been rolled over, hence the name.
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