Question

Identify the quality of service (QoS) mechanism that can set a bandwidth limit on traffic and drop packets attempting to exceed that bandwidth limit.

a) Traffic shaping
b) Policing
c) Weighted Fair Queuing (WFQ)
d) Random Early Detection (RED)

Answer 1

policing

Step-by-step explanation:

The quality of service (QoS) mechanism that can set a bandwidth limit on traffic and drop packets attempting to exceed that limit is "b) Policing."

Policing is a QoS mechanism that enforces traffic limits by inspecting packets and dropping or marking them if they exceed a certain predefined rate. It sets a maximum bandwidth limit and ensures that traffic adheres to that limit by discarding any packets that exceed it.

Other options mentioned:

a) Traffic shaping: Traffic shaping is a QoS mechanism that controls the flow of traffic by delaying or queuing packets to ensure they conform to a certain traffic profile. It is used to shape the overall bandwidth usage and manage congestion.

c) Weighted Fair Queuing (WFQ): WFQ is a scheduling algorithm for network packets that aims to provide fairness and prioritize traffic based on its assigned weights. It does not specifically enforce bandwidth limits or drop packets exceeding the limit.

d) Random Early Detection (RED): RED is a congestion avoidance mechanism that drops packets selectively based on the level of congestion in the network. It does not set specific bandwidth limits, but rather probabilistically drops packets to prevent congestion.

Answer 2

Policing is the QoS mechanism that sets a bandwidth limit and drops packets exceeding that limit to prevent traffic from surpassing the defined bandwidth.

Step-by-step explanation:

The quality of service (QoS) mechanism that can set a bandwidth limit on traffic and drop packets attempting to exceed that bandwidth limit is Traffic shaping. Traffic shaping is a technique used to control the flow of network traffic by setting a maximum bandwidth for certain types of traffic. When the traffic exceeds the defined limit, packets are dropped.

The quality of service (QoS) mechanism that can set a bandwidth limit on traffic and drop packets attempting to exceed that bandwidth limit is known as policing. Policing actively monitors the data rate of traffic flow and can enforce a set maximum limit by dropping excess packets or downgrading their priority, ensuring that no traffic exceeds the defined bandwidth limit. In contrast, traffic shaping delays excess traffic, WFQ distributes bandwidth across different flows based on weights, and RED preemptively drops packets to avoid congestion.