The principle and working mode of Router QoS

When setting up a router, most will use the security mechanism of the router, also often said the QoS function, the QoS function can protect the entire network security, this article takes you to understand its concrete principle and the work way.

One, the QoS is used to solve the bandwidth to solve the problem of network latency and congestion, such as a technology, generally contains the priority level, flexible bandwidth management, etc., mainly used to solve a variety of network attacks and viruses, protect the normal operation of the network, it mainly has the following functions:

1, Port priority: can be for the source port, destination port to set the priority level, in general, if the game is mainly played. Then I can target some of the major game ports. Prioritize the bandwidth of these games.

2, ip/network segment priority: can be for source IP, destination IP. or segment to set the priority level, we can first guarantee the bandwidth of the Web server. Then ensure the client's bandwidth, and then ensure the server's bandwidth.

3, the remaining bandwidth preemption priority: By definition refers to in use. When the bandwidth of the network has surplus. The remaining bandwidth can be allocated to certain IP, some ports. In this way, you can make full use of bandwidth. And not waste!

4, Small packet priority: Small packet usually refers to less than 64K package, such as: Ping package. Request packages, response packs, and so on. In the process of surfing the Internet. There will be many requests, responses. When these packages are given priority, they will give us a much quicker feeling.

Second, there is a more reasonable management of bandwidth, before setting up we need to know how much bandwidth we have, so as to accurately set.

1, bandwidth idle, speed can reach maximum speed, if the bandwidth is free, then download the maximum speed can reach the peak speed of download, even if the bandwidth is only one person in use, will not exceed this peak speed. This is the bandwidth is temporarily borrowed from others, when others need, will automatically retreat out.

2, bandwidth has a certain rate of use, speed in the "Guaranteed speed" and "maximum speed" between, if the bandwidth has a certain utilization rate, a certain number of Internet users, bandwidth utilization rate of about 80%, the download speed will be reduced to "ensure download speed" and the maximum download speed.

3, bandwidth usage is higher or all use, speed is equal to or less than guaranteed speed, if the bandwidth utilization rate is high, then download speed will not exceed the minimum download speed, if the total bandwidth can not meet the guaranteed speed of everyone, then the end of each person's speed will be less than guaranteed speed.