Virtual Host article--the difference between multiple lines and two lines!

Since the search engine more value http://www.aliyun.com/zixun/aggregation/27057.html "> site space Security and stability, webmaster selection of Web site space for dual-line host more and more value." But a lot of webmaster when talking about the dual-line mainframe, the degree of understanding of its only stay in the know, and do not know the reason why the level. Only know that the dual-line host is stable, more expensive than a single machine. In this way, some bad host providers use the vast number of webmaster and business owners of the two-line mainframe do not understand, wantonly use poor host shoddy, used for profiteering. Based on this, the small series summed up the previous understanding of the dual-line mainframe, the depth of a variety of "dual-line mainframe" principle and advantages.

The first type: dual-line dual IP host

Road dual IP host, that is, the installation of two network cards on a server, respectively, access to telecommunications and unicom two lines, compared to the telecommunications host, so that the server has two IP addresses, and then use the router technology to automatically identify the line of visitors, so as to achieve telecommunications users to use the telecommunications IP into the Netcom users use the Internet IP Access website. This can be done from the hardware to solve the difficulties of two kinds of circuit exchange, so as to improve the speed of the site.

This approach can improve the speed of visitors to a certain extent, but the disadvantage is also obvious, because the server is dual network card dual IP, the network must have server routing table settings, which brings a lot of trouble to users. If the webmaster is not professional, processing the huge database data on the server will be busy, and this kind of host is only suitable for less space visits site, once the site traffic is too large, the system will be unstable.

The second type: dual-line single IP host

Ordinary dual-line single IP address host is to set up an IP address on the server (IP address Telecom netcom can), the use of router devices will be the data of the visitor line shunt, in order to achieve the dual-line function. This scheme can improve the user's access speed to a certain extent, because it uses single IP to achieve double line effect, its double line effect is discounted. Because this technology is a one-way mainframe transition to a dual-line host of the compromise technology, in the price of such a host has a clear competitive advantage, the site space for small and medium-sized sites to build stations.

The third type: CDN Mainframe

The full name of CDN is content IBuySpy receptacle, that is, contents distribution network. The goal is to add a new layer of network architecture to the existing Internet, publish the content of the Web site to the nearest user's network "edge", so that users can get the required content, solve the Internet congestion situation, improve user access to the Web site response speed. The problem of slow response of users visiting the website due to the small network bandwidth, the large amount of users ' access and the uneven distribution of the Web site are comprehensively solved from the technology. However, the CDN host Dynamic Web site support is not satisfactory, the construction station cost is too high, generally only medium and large Web sites will be used.

Fourth: BGP multi-line host

BGP multi-line host technology means that through the BGP protocol, the IP mapping of one of the lines directly on the IP, the site visitors can automatically enter the space through the best line, improve the speed of the site open. BGP (Boundary Gateway Protocol) Protocol is mainly used to interconnect the Internet as (autonomous system), the most important function of BGP is to control the transmission of Routing and select the best route. Netcom and China Telecom both have the as number (autonomous system number), the country's major network operators are mostly through the BGP protocol and its own as number to interconnect. Use this scheme to achieve dual line needs in CNNIC (China Internet Information Center) to apply for IDC's own IP address segment and as number, and then through the BGP protocol to broadcast this IP address to Netcom, telecom and other network operators, Using BGP interconnection, all backbone routing devices of netcom and Telecom will judge the best route of IP segment of IDC room to ensure the high-speed access of Netcom and telecom users.

The advantage of using BGP host is that he will not occupy the server system resources, there is no site space instability occurs, really belong to the stable high-speed dual-line mainframe. As a result of the BGP host technology advantage, the website space can be automatically backed up, save backup trouble, line failure can also automatically switch to other lines, to eliminate the "0" access. BGP has the advantage of interconnection with various lines, no matter what line users use, can access the Web site at high speed. BGP host HTTP://WWW.IISP.COM/USER/REGISTER.PHP?S=ASDX