Vro product advantages and disadvantages

China's vro products have developed very rapidly, so I have studied the advantages and disadvantages of vro products. I would like to share with you here, hoping to help you. Recently, some netizens asked in the Forum: "low-end router products and high-end router products are similar in usage. Why is the price so far different ?" In fact, this question is very good.

Many friends who are not familiar with the product and technology will have similar questions-"Why is this router product so expensive with the same features, another one is so cheap. "Why are some router products so expensive? And some are so cheap ?" "The two router products have the same main parameters. Why is the performance so far different ?" Router product Working principle: the simplest network can be imagined as a single-line bus, each computer can send packets to the bus to communicate with each other. However, as the number of computers in the network increases, this is not feasible and may cause many problems:

1. bandwidth resources are exhausted.

2. Each computer wastes a lot of time processing unrelated broadcast data.

3. The network becomes unmanageable, and any errors may paralyze the entire network.

4. Each computer can listen to communications from other computers.

Network segments can solve these problems, but at the same time, you must provide a mechanism for computers in different network segments to communicate with each other, that is, to promote devices like routers: routers work at the IP network layer, used to forward data between subnets. Vro products generally have multiple network interfaces, including local network interfaces and wide area network interfaces. Each network interface connects to a different network. The router product records the network information connected to each network port. At the same time, there is also a route table in the router product, which records the port numbers to be sent to different network addresses. The communication information of various information services used by Internet users can all be attributed to information transmission in units of IP packets. In addition to the data information to be transmitted, it also contains the destination IP address to be sent, the source IP address to be sent, and some related control information. When a router receives an IP packet, it searches for the route table based on the destination IP address in the packet and sends the IP packet to the corresponding port based on the search result. The next IP router product continues forwarding after receiving the packet until it is sent to the destination. Router products can exchange route information through the routing protocol to update the route table.

Factors affecting the performance of router Products

After the above introduction, we may not know much about the work of the router products, but it does not matter. This is not our purpose. We mainly want to explain it to you, the working principle of the router determines that it must use a chip to complete some necessary judgment and data packet forwarding,

This is done by a processor, and various data packets to be processed or processed exist in the memory. Therefore, the operating frequency and memory capacity of the processor determine the performance of a vro to a large extent. However, the performance of vro products cannot fully depend on the processor frequency and memory capacity. The performance of vro products is poor, but the performance of vro products is not necessarily good when the processor is good; the processor clock speed is only a performance indicator of the processor. Its bus width (16-bit or 32-bit), Cache capacity and structure, internal bus structure, single CPU, multi-CPU distributed processing, computing mode, and other indicators will affect the performance of the processor.

Almost all vro products use communication-related RISCCPU. Therefore, "communication-related RISCCPU" is equivalent to having nothing to say. The key is to see what kernel and internal structure the CPU uses. The same is true for the memory. The size of the memory does not matter. If the load is not large, there may not be much difference between the 4 M memory and the 8 M memory, therefore, it is not scientific to judge the performance of the vro Based on the memory size (of course, the high memory capacity is good ).

Metrics that determine the router product grade

Although it has already been mentioned above, the processor and memory determine the performance of the router product to a large extent. However, the indicators that determine the grade of a router product are not them, this is why the two parameters are often not marked in the main parameters of the product. What is used to measure the grade of a router product? The load capacity is also called the number of hosts.