Shulou(Shulou.com)06/03 Report--

Is the line included when purchasing a CVM? When purchasing a CVM, the merchant will let you choose the line, such as single-line, dual-line or BGP, single-line China Unicom or China Telecom, and so on. The parameter configuration of the CVM includes lines. Let's take a look at it with the editor.

Single-line computer room

Single-line computer room generally refers to access to only one line, either access to China Unicom or telecommunications line access.

Dual-line computer room

The dual-line computer room is produced to solve the problem of interconnection between the two major domestic networks (Telecom and Netcom). In fact, the dual-line computer room is connected by two lines of telecom / Netcom.

Through the router setting in the two-line computer room and the analysis of BGP automatic routing, telecom users can access telecom lines and Netcom users can access Netcom lines, so that Telecom Netcom can access them quickly. Double-line computer room is divided into two ways, one is dual-IP dual-line, the other is single-IP dual-line.

Multi-line computer room

CVM multi-line refers to automatically grabbing the data of the user source server through the buffer program on the network nodes of the backbone lines of different network operators, such as Telecom, Netcom, Mobile, TieTong, etc., and then cache it on the servers of different network nodes. Combined with the sub-network analysis function of the intelligent DNS server, different network users can access the website on the nearest network segment.

Advantages and disadvantages of different lines

Single line

The advantage of single-line computer room is large bandwidth, low price, and high defense; the disadvantage is the interconnection between Netcom and telecom lines, when telecom users visit Netcom website or Netcom users visit telecom website very slowly.

Double line

CVM rents two-line computer rooms to support users from all over the country, which is suitable for websites aimed at users all over the country, such as mall websites, portal websites, etc.; the deficiency is that the cost is high and the bandwidth is small.

Multiple lines

Multi-line is realized through CDN (content delivery Network), but most of the CDN technology is relatively mature and interactive on static websites, and the websites with full dynamic pages are not very mature. Can avoid because of network problems and affect the speed of website access, the price is also the highest.

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