College】 【medium weak Detailed Planning cafes IP (Zhuantie).

<br> <BR> <BR> learn more about the IP address <BR> <BR> classification method described in this paper for medium-sized, more than 255 Internet cafes in more than reference use. .Network technology who want to improve their level of Internet network is undoubtedly a "book" type of article. .<BR> <BR> Network IP address "major" ABC is divided into three categories, following coverage: <BR> <BR> A Class :0.0.0.0-127 .255.255.255, who marked the subnet mask is 255.0. .0.0 (marked by another subnet mask is / 8, is to be converted into a binary mask, the left several 8 1). .<BR> <BR> B Class :128.0.0.0-191 .255.255.255, who marked the subnet mask is 255.255.0.0 (marked by an alternative method for the subnet mask is / 16, that is, the subnet mask .converted into binary, the left several 16 1). .<BR> <BR> C Class :192.0.0.0-223 .255.255.255, who marked the subnet mask is 255.255.255.0 (marked by an alternative method for the subnet mask is / 24, that is, the subnet mask .converted into binary, the left several 24 1). .<BR> <BR> To save space, but also to reduce the clerical error, the following subnet mask are used / x such labeling methods, x the maximum possible value is 32, minimum is 0. .<BR> <BR> Here also involves a subnetting question <BR> <BR> ICANN awarded if you 9.xxx, you get is 9.0.0.0 / 8 Who is a standard class A network, because the network is too .Big may be hard to manage, then you can subnet into 9.1.0.0/16, 9.2.0.0/16, 9.3.0.0/16,,, 9.255.0.0/16, subdivided some 9.255.1.0/24 ., 9.255.2.0/24 ... ... of course, can also be split down finer. .<BR> <BR> Issue of the merger there is a subnet <BR> <BR> ICANN awarded if you 220.220.xx, according to the standard you get is: <BR> 220.220.0.0/24, 220.220.1.0 / .24,220.220.2.0 / 24 ... ... 220.220.255.0/24 this 256 standard C class network, and you needa million units on the node can accommodate a large network, you can put into a network with 220.220.xx and .is 222.220.0.0/16, to called CIDR, will stay later we will use this. .<BR> <BR> Where planning for the private IP address part of the region, just a part of ABC within: <BR> <BR> 10.0.0.0-10.255.255.255 (10.0.0.0 / 8) <BR> <BR .> 172.16.0.0-172.31.255.255 (172.160.0./16-172.31.0.0/16) <BR> <BR> 192.168.0.0-192.168.255.255 (192.168.0.0/24-192.168.255.0/24) <BR .> <BR> there are some special parts, such as 127, 169 part, D, E class, 224-255 parts, with this theme is not detached. .<BR> <BR> IP address in today's public network is very valuable resource, especially in China. .<BR> <BR> Then, a considerable number of enterprises, institutions, and even Internet cafes, and their internal LAN is also really no need to use the public network IP, it uses a private IP address. .In accordance with the scale of larger companies to choose 10.xxx, plays some of the use of 172.16.xx, a smaller number of Internet cafes, with the most popular is 192.168.0.x, a standard C class networks. .<BR> <BR> Xiaobian Tip: <BR> <BR> 192.168.0.x the most popular use of the standard is just a habit, rather than prescriptive! .<BR> <BR> · IP network used for Internet cafes, the "class" <BR> <BR> Internet cafes are more open now bigger, and a standard class C network has been unable to meet the requirements of volume, that can not speak .192.168.0.x and 192.168.1.x to put in a network? .Yes, of course! .<BR> <BR> Introduced the concept of CIDR, it is easy to conclude, 192.168.0.0/255.255.254.0, or 192.168.0.0/23, is 192.168.0.x +192.168.1. X, for both the network address .and the broadcast address, can accommodate a total of 512 nodes. .Of course, 192.168.0.0/22, 192.168.0.0/21, 192.168.0.0/20 ... ... as well as 192.168.0.0/16, can hold more nodes are planning method. .<BR> <BR> But I am a bad impression of CIDR, CIDR is a method, should not the norm, so that caused some compatibility problems. .<BR> <BR> Then set Windows2000 (SP2) in the RRAS, which has a similar interface to filter filtration may be many of my friends have this experience: the definition of the target network, it does not recognize 218.4.0.0/255.255. .0.0 such a network, said that the subnet mask is invalid, you need to manually configure the 218.4.0.0/24, 218.4.1.0/24, 218.4.3.0/24 ... ... 218.4.255.0/24 that 256 target network (as C category .This IP address subnet mask 255.255.255.0 identified only). .<BR> <BR> In cafes by IP address within the network, many network friends asked, "Internet cafes in more than 254 hosts, IP address how divided, why are pushed to 192.168.xx this C class?" .<BR> <BR> 10.0.0.0 / 8 and 172.16.0.0/16-172.31.0.0/16 is actually a ready-made, very good choice, but also meet the labeling requirements. .As a friend said that this would cause division, "broadcast storm" which is nothing unreasonable. .<BR> <BR> Not speak really broadcast storm occurs, we can think of, 10.0.0.0 / 8 can indeed accommodate the 16,777,216 nodes, but you really have 16,777,216 hosts it? .Radio volume and is proportional to the number of hosts within the LAN can be accommodated with the number of hosts on the LAN can be no relationship, but also in cafes such hardware and software environment, as long as the equipment and link the normal and the client will not have any produce broadcast storms .. .<BR> <BR> You are tired of 10.xxx, you are also tired of 172.16.xx-172.31.xx, you also tired of 192.168.xx, then I'd give you can assign a representative of ICANN, personalized network IP address .. .<BR> <BR> Cafes within the network and good luck with 1.1.1.x remember such a network have personality, completely feasible. .If someone on the Internet, access to 1.1.1.x, you will not go there to go, only to real 1.1.1.x address there. .<BR> <BR>.