About parameter settings and security functions in vro (1)

A vro serves as the egress for communication between the entire network and the outside world and serves as a bridge connecting internal subnets. In the process of establishing a network, the purchase of a router is extremely important. Among all network devices, the price of routers is also very expensive, and it is the first scene of network equipment. It is not like some NICs and hubs have similar functions and performance, and the price is also basically the same, users do not have to worry about it during the purchase. The performance of different routers varies a lot, and the price cannot be the same. Therefore, when purchasing a vro, you must pay attention to the various performance parameters and functions of the vro.

The current Broadband Router has many rich functions, such as DDNS, NAT, and VPN. For some different users, these terms are just confusing. All the features of the Broadband Router must be clear before you can purchase them clearly. Otherwise, the purchased vro cannot meet the needs of the network, or the vro purchased at a high price has unnecessary high performance and functions. Therefore, it is enough to make the purchase. Of course, you need to understand the performance parameters of the router and the meanings of some functions in order to make it clear. The following describes some common performance parameters and functions of routers. It is expected to be helpful for consumers when purchasing products.

Main Performance Parameters of a Broadband Router

CPU

The vro processor is the core device of a vro, like a computer motherboard or vswitch. The quality of the processor directly affects the performance of the router. As the core part of a Broadband Router, the quality of the processor often determines the throughput of the Broadband Router, which is the most important parameter. Generally, if the processor clock speed is less than m, this type of Broadband Router is suitable for common household and SOHO users. M to M medium, more than M is a relatively high frequency. Suitable for Internet cafes, small and medium-sized enterprises, and branches of large enterprises.

In addition to the operating frequency, the bandwidth router's processor architecture should also be noted. The CPU of A Broadband Router is generally based on x86, ARM7, ARM9. The core processors of arm9-and MIPS are currently the mainstream, and the arm7-and RDC architectures have been eliminated. The performance of the processors using these two architectures is poor, and mainstream manufacturers are no longer using them.

Memory

A vro may contain multiple types of memory, such as Flash and DRAM. The memory is used for storage configuration, router operating system, and routing protocol software. In the middle and low-end routers, the route table may be stored in the memory. Generally, the larger the vro memory, the better (regardless of the price ). However, similar to CPU capabilities, the memory does not directly reflect the performance and capabilities of the router. Because efficient algorithms and excellent software may greatly save memory.

In general, 1M--4M 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 be measured in bytes or Bit. The difference between the two is eight times the difference in size (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.

Throughput

Throughput refers to the packet forwarding capability of the entire device and is an important indicator of the device performance. The router selects routes based on IP headers or MPLS labels, so the performance indicator is the number of forwarding packets per second. The device throughput is generally less than the sum of the throughput of all ports on the vro.

The throughput indicates the amount of data that the router can process per second. For example, the router works like a post office package business. The Post Office sends parcels to the post office to send the items, senders, recipients, and other information to the post office. The post office packs the items, and paste the formatted package form, check the correctness and then deliver it to the destination. Package receiving is the opposite process. The vro is basically the same, but what you send and receive is data. Throughput is equivalent to the package processing capability in the post office unit time, which is an intuitive reflection of the router performance. Generally, the throughput is the test data obtained when NAT is enabled and the firewall is disabled. There are two ways to test the throughput: Smartbits test and Chariot test. The results can be different.

Supported network protocols

Network protocols are rules for transmitting and managing information on networks (including the Internet. For example, communication between people must follow certain rules, and mutual communication between computers must comply with certain rules. These rules are called network protocols. Common protocols include TCP/IP, IPX/SPX, and NetBEUI. IPX/SPX is usually used in LAN. If you access the Internet, you must add the TCP/IP protocol to the network protocol.