Implementing Cisco IP Routing (CCNP ROUTE, legacy) — Question 321

A network engineer notices that transmission rates of senders of TCP traffic sharply increase and decrease simultaneously during periods of congestion. Which condition causes this?

Answer options

• A. global synchronization
• B. tail drop
• C. random early detection
• D. queue management algorithm A

Correct answer:

Explanation

The correct answer is global synchronization, which occurs when multiple TCP connections reduce their transmission rates simultaneously due to congestion, leading to a synchronized pattern of increase and decrease. Tail drop and random early detection are queue management techniques that do not inherently cause this simultaneous behavior. Queue management algorithm A is not a recognized term in this context.