3com 5500-ei pwr Instruccion De Instalación

 

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When configuring QoS, go to these sections for information you are interested in: 

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Overview 

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Displaying and Maintaining QoS 

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Quality of Service (QoS) is a concept concerning service demand and supply. It reflects the 

ability to meet customer needs. Generally, QoS does not focus on grading services 

precisely, but on improving services under certain conditions.  

In an internet, QoS refers to the ability of the network to forward packets. The evaluation 

on QoS of a network can be based on different aspects because the network may provide 

various services. Generally, QoS refers to the ability to provide improved service by 

solving the core issues such as delay, jitter, and packet loss ratio in the packet forwarding 

process.  

In traditional IP networks, packets are treated equally. That is, the FIFO (first in first out) 

policy is adopted for packet processing. Network resources required for packet forwarding 

is determined by the order in which packets arrive. All the packets share the resources of 

the network. Network resources available to the packets completely depend on the time 

they arrive. This service policy is known as Best-effort, which delivers the packets to their 

destination with the best effort, with no assurance and guarantee for delivery delay, jitter, 

packet loss ratio, reliability, and so on.  

The traditional Best-Effort service policy is only suitable for applications insensitive to 

bandwidth and delay, such as WWW, E-mail and FTP.  

With the expansion of computer network, more and more networks become part of the 

Internet. The Internet gains rapid development in terms of scale, coverage and user 

quantities. More and more users use the Internet as a platform for their services and for 

data transmission.