Answer:
Queue 2 & Queue 3
Step-by-step explanation:
It would make sense to use a congestion avoidance (drop management) tool in queues 2 and 3, as these queues hold predominantly TCP traffic. TCP is a connection-oriented protocol that includes built-in congestion control mechanisms, so it may be less prone to congestion than UDP. However, it is still a good idea to use congestion avoidance tools in queues 2 and 3 to help manage the flow of packets and prevent the queues from becoming full and overflowing.
It may also be useful to use a congestion avoidance tool in queue 1, which holds predominantly UDP traffic, as UDP is a connectionless protocol that does not have built-in congestion control mechanisms. This can help to prevent congestion in the queue and ensure that packets are delivered reliably.
In general, it's a good idea to use congestion avoidance tools in any queue that is at risk of experiencing congestion, as they can help to ensure that packets are delivered reliably and efficiently, even in high-traffic environments. So, it is always a good idea to use congestion avoidance tools in all of the queues in the queuing system.