Question:
With respect to computer networks, which of the following is the correct expanded form of RJ 45?
With respect to computer networks, which of the following is the correct expanded form of RJ 45?
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RJ 45 is the Ethernet cable connector. RJ stands for Registered Jack.
Updated On: Oct 20, 2026
- Radio Jockey 45
- Registered Jockey 45
- Radio Jack 45
- Registered Jack 45
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Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Know what RJ 45 is:
RJ 45 is the connector used at the end of an Ethernet (twisted pair) cable.
It looks like a bigger telephone plug and fits into the LAN port of a computer or switch.
Step 2: Recall the full form:
RJ stands for Registered Jack. The number 45 is the standard code of this type of jack.
So the full form is Registered Jack 45.
Step 3: Check the options:
Option (A) Radio Jockey 45 is a radio presenter, not a network term.
Option (B) Registered Jockey 45 mixes 'registered' with a wrong word.
Option (C) Radio Jack 45 is wrong because RJ has nothing to do with radio waves.
Option (D) Registered Jack 45 is correct.
Final Answer:
RJ 45 stands for Registered Jack 45. This is option (D).
RJ 45 is the connector used at the end of an Ethernet (twisted pair) cable.
It looks like a bigger telephone plug and fits into the LAN port of a computer or switch.
Step 2: Recall the full form:
RJ stands for Registered Jack. The number 45 is the standard code of this type of jack.
So the full form is Registered Jack 45.
Step 3: Check the options:
Option (A) Radio Jockey 45 is a radio presenter, not a network term.
Option (B) Registered Jockey 45 mixes 'registered' with a wrong word.
Option (C) Radio Jack 45 is wrong because RJ has nothing to do with radio waves.
Option (D) Registered Jack 45 is correct.
Final Answer:
RJ 45 stands for Registered Jack 45. This is option (D).
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