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TCP or IP Applications QoS Needs and Impact
TCP/IP applications often have Quality of Service (QoS) requirements, particularly in situations where real-time delivery is important, such as voice and video communications. QoS is a set of techniques that ensure that the network can meet the demands of these applications, by providing predictable levels of service.
The impact of QoS requirements can be significant, particularly in terms of network bandwidth and latency. For example, video conferencing applications require high-bandwidth, low-latency connections in order to maintain real-time video and audio synchronization. In contrast, email and file transfer applications may be less sensitive to network delays and bandwidth limitations.
TCP/IP provides several mechanisms to support QoS, including:
Traffic prioritization: This involves assigning different priorities to different types of traffic, to ensure that high-priority traffic is given preferential treatment on the network.
Traffic shaping: This involves controlling the rate of traffic flow to ensure that it meets the bandwidth and latency requirements of the application.
Congestion control: This involves controlling the rate of traffic flow to prevent network congestion, which can cause delays and packet loss.
Resource reservation: This involves reserving network resources, such as bandwidth and buffer space, to ensure that they are available when needed by the application.
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