Home » CompTIA » JK0-019 » Which of the following performance optimization techniques would be MOST beneficial for a network-wide VoIP setup?
Which of the following performance optimization techniques would be MOST beneficial for a network-wide VoIP setup? (Select TWO).
A. Proxy server
B. Traffic shaping
C. Caching engines
D. Load balancing
E. Quality of service
Correct Answer: BE
Explanation/Reference:
Explanation: Traffic shaping retains excess packets in a queue and then schedules the excess for later transmission over increments of time. The result of traffic shaping is a smoothed packet output rate. QoS (Quality of Service) is a major issue in VOIP implementations. The issue is how to guarantee that packet traffic for a voice or other media connection will not be delayed or dropped due interference from other lower priority traffic.
Things to consider are:
Latency: Delay for packet delivery
Jitter: Variations in delay of packet delivery
Packet loss: Too much traffic in the network causes the network to drop packets Burstiness of Loss and Jitter: Loss and Discards (due to jitter) tend to occur in bursts
