Consider the following statements regarding multiple access techniques &…
2025
Consider the following statements regarding multiple access techniques & identify the CORRECT ones.
A. ALOHA is used for multiple access on a shared medium
B. TDMA uses WALSH TABLES for time slot allocation
C. CSMA/CD was invented for wireless networks
D. CDMA codes are sequence of number generated by orthogonal codes
Choose the correct answer from the options given below:
Answer: D. A & D only — Statement AALOHA is used for multiple access on a shared medium ✔ Correct ALOHA is a random access protocol designed for multiple users sharing a common…
- A.
A & B only
- B.
B & C only
- C.
C & D only
- D.
A & D only
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Show answer & explanation
Correct answer: D
Statement A
ALOHA is used for multiple access on a shared medium
✔ Correct
ALOHA is a random access protocol designed for multiple users sharing a common communication medium.
Statement B
TDMA uses WALSH TABLES for time slot allocation
✘ Incorrect
TDMA (Time Division Multiple Access) divides time into fixed time slots.
Walsh codes are used in CDMA, not TDMA.
Statement C
CSMA/CD was invented for wireless networks
✘ Incorrect
CSMA/CD (Collision Detection) is used in wired Ethernet (LANs).
Wireless networks use CSMA/CA (Collision Avoidance) instead.
Statement D
CDMA codes are sequence of numbers generated by orthogonal codes
✔ Correct
CDMA uses orthogonal spreading codes (e.g., Walsh codes) to separate users.
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