Application viewpoint: learning the main parameter indicators of a Broadband Router

The development of broadband routers in China is still very rapid. At the same time, there are a wide range of users. Many users are still very familiar with the parameters of some broadband routers, here I will give you a detailed explanation of some parameter settings for broadband routers. With the gradual popularization of broadband networks, broadband routers have become more and more widely used and have derived and developed the broadband routing market.

Manufacturers have launched Broadband Router products with different functions and numerous names, making it impossible for most consumers who want to buy broadband routers but lack basic technologies. Therefore, here, we will analyze and interpret the main performance indicators of the purchased Broadband Router one by one, which will help consumers to select a Broadband Router.

1. CPU clock speed

Analysis: the processor of A Broadband Router is the core device of a Broadband Router, just like that of a computer motherboard or vswitch. The quality of the processor directly affects the performance of the Broadband Router. If the processing capability is poor, the performance of the Broadband Router will not be good. However, if the processor is good, the performance of the Broadband Router may not be good, because the processor is not the only factor that determines the Broadband Router.

Second, some broadband routers on the market often claim "100 M processor clock speed, strong performance" and so on. In fact, in addition to the CPU clock speed, you must also understand its bus width, Cache capacity and structure, internal bus structure, single CPU or multi-CPU distributed processing, and computing mode, these will greatly affect the performance of the processor, which is no less important than the clock speed. The key is to see what kernel the CPU uses and what the internal structure is.

Advanced User: Generally, the processor clock speed is less than m, M ~ M is medium, and above M is a relatively high frequency. What kernel is the processor? Is it 80186, ARM7, arm9-, MIPS, or Intel Xscale? What is the Cache capacity? Is single CPU or multi-CPU distributed processing? 80186. The ARM7 kernel processor is a typical configuration of the first-generation Broadband Router with low performance and is no longer used by mainstream vendors. The core processors of arm9-and MIPS are currently mainstream. The Intel Xscale architecture is an advanced network processor for high-end products. The Cache capacity is 8 K or less, which is usually 16 K, and 32 K or more is large. Generally, a single CPU is used. A multi-CPU distributed processing system is used for advanced processors with high performance. You can also take a deeper look at the 920 T, 922 T, T, 940T, or enhanced 926E, 946E, and 966E types of ARM9. the MIPS is 2 K, 3 K, 4 K, or 5 K, the performance and structure of different models vary greatly. If you are interested, you can search by processor model on the Internet, and then go to the website of the chip manufacturer to look good at it.

2. Memory Capacity

Analysis: The processor memory is used to store all the data in the computing process. Therefore, the size of the memory has a certain impact on the processing capability of the processor. But there is a problem: the memory size is one aspect, and whether it can be used scientifically is more important. High-level software design can well plan and use the memory, and low-level software does not have the design capability. Directly Copy the processor chip manufacturers provide reference software without optimization, memory cannot be effectively planned and used. This is like setting up a room. A savvy Shanghai woman is good at "Building a track in a shell". Everything is reasonable and every inch is used properly, hundreds of square meters of living room can place all the furniture and electrical appliances. But to be a lazy bachelor, a room of the same size and the same amount of furniture and appliances are not only likely to be placed down, but in a few days the room was full of rubbish, there is no such thing as a foothold. Therefore, it is unreasonable to judge the performance of the Broadband Router Based on the memory size.

Advanced User: Generally, 1 Mbit/s ~ 4 M Bytes is small, 8 M Bytes is medium, 16 M Bytes or above is large. In addition, it should be particularly noted that many dealers and even vendors only say how many MB of memory when talking about the memory, so be sure to ask whether it is Byte or Bit. Memory can use Byte bytes) as the unit, or Bit) as the unit, the difference between the two sounds, the capacity difference is 8 times 1 Byte = 8 Bit )! Generally, B is written in uppercase to indicate Byte, and B is written in lowercase to indicate Bit. People with ulterior motives will do their work here. Some do not mark unit, but also mark B as a Byte that passes through the sea. You can go to the website of the chip manufacturer to find out. Some criminals even use polishing chips to fake the chip silk screen, so it is very important to choose honest and trustworthy factory products.

3. Flash capacity

Analysis: Flash is used to store operating systems and applications. The size of Flash depends mainly on the operating system used, the writing efficiency of applications, and the fancy user interface. If you choose an efficient real-time operating system such as VxWorks, Ecos, and Nucleus), designers can use small-capacity Flash if they have a profound understanding, reasonable cropping, and high writing efficiency. If you choose an inefficient operating system such as Linux, the designer does not understand the operating system, the writing efficiency is low, or simply copies the reference software not optimized by the chip manufacturer, you can only use large-capacity Flash. From this point of view, the less Flash is used, the higher the level of software, the more trustworthy the product. Of course, there are many features and user interfaces. If there are many high-definition images, Flash will be a little larger.

Advanced Users: ordinary users do not need to know how big Flash is. It is enough to check whether the function meets the requirements.