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300-320 · Question #67
300-320 Question #67: Real Exam Question with Answer & Explanation
The correct answer is D: Tx-queue starvation. Tx-queue (transmit queue) starvation is the most common cause of congestion in campus networks, occurring when outbound traffic demand exceeds the interface's output capacity.
Question
Which option is a common cause of congestion found in a campus network?
Options
- Ainput serialization delay
- Boutput serialization delay
- CRx-queue starvation
- DTx-queue starvation
Explanation
Tx-queue (transmit queue) starvation is the most common cause of congestion in campus networks, occurring when outbound traffic demand exceeds the interface's output capacity.
Common mistakes.
- A. Input serialization delay is the time to place bits on a link and is a concern on low-speed WAN links, not a primary congestion cause in high-speed campus switching environments.
- B. Output serialization delay is similarly negligible on campus Gigabit or 10G links and is not a common campus congestion cause.
- C. Rx-queue (receive queue) starvation is not a standard campus networking term for congestion - congestion is fundamentally an output phenomenon where transmit queues overflow.
Concept tested. Campus network congestion - transmit queue starvation
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