When setting up a router, you will often use its security mechanisms, commonly referred to as the QoS feature. The QoS feature protects the security of the entire network. This article walks you through its specific principles and how it works.
1. QoS is a technology used to address bandwidth, network latency, and congestion issues. It generally includes priority levels, flexible bandwidth management, and more, primarily designed to combat various network attacks and viruses, ensuring the normal operation of the network. Its main functions include the following:
1. Port Priority: You can set priority levels for source ports and destination ports. Generally speaking, if gaming is your primary activity, you can target the ports of some mainstream games and prioritize bandwidth for those games.
2. IP/Subnet Priority: You can set priority levels based on source IP, destination IP, or subnet. We can guarantee bandwidth for the web server first, then for client machines, and then for the server.
3. Surplus Bandwidth Preemption Priority: As the name suggests, when there is surplus network bandwidth during use, this remaining bandwidth can be allocated to certain IPs or ports. This allows you to fully utilize your bandwidth without waste!
4. Small Packet Priority: Small packets typically refer to packets smaller than 64K, such as ping packets, request packets, and response packets. During internet browsing, many requests and responses occur. Prioritizing these packets makes the experience feel much faster.
2. Another aspect is the ability to manage bandwidth more rationally. Before setting this up, we need to know how large our bandwidth is to configure it accurately.
1. When bandwidth is idle, the speed can reach the maximum speed. If there is free bandwidth, the download speed can reach its peak download rate. Even if only one person is using the bandwidth, it will not exceed this peak speed. This bandwidth is temporarily borrowed from others; when others need it, it will automatically be relinquished.
2. When bandwidth has a certain utilization rate, the speed falls between the “guaranteed speed” and the “maximum speed.” If there is a certain usage rate and a