About the same CIDR block and different CIDR blocks of the intranet

Whether you are a specific problem to solve or only discuss the problem, from your description, the current situation is no problem, if you are connected to this in actual use There is a limit to the number of device connections, that is, you can't connect a few devices, in fact, you can consider a way to connect beams: the router is connected to a switch downward, this switch can make multiple ports, such as 16 ports, 24 ports, so that only one address allocation pool on the router is needed, so that more than 20 computers can be connected below, And if the network scales up, you can also directly split another line from the router to a switch.

In the connection of network equipment, especially the switch, there is a principle that try to use a tree-shaped hierarchical connection, and it is best not to use a series cascade, so that the network will be more stable and uniform.

What is your motivation for doing this?

If you simply want to achieve resource sharing, you can use a computer as a server, and then the server adds network cards, two network segments on two network cards, three network segments on three network cards, each network card is connected to a router with different network segments, and then these network cards are bridged in XP, so that machines in different network segments can also achieve mutual access. In addition, it is okay to add a router directly without adding a server, but you need to set up a routing table, which is more troublesome, but the effect of using a router is much better than a bridge if there are many network segments. Because there are too many network cards in the XP, there may be instability, generally only two or three network cards.

Use 10 for the intranetCIDR blockThe reason is that in order to realize the communication between computers with different IP network segments in the LAN, it is necessary to add a message on the core switchDefault routePrivate address.

Used to assign a host address to a local area network. In the LAN, you can even use any IP you want, but 192 has been cultivated into a habit by home routers for a long time.

A computer on the intranet can send a connection request to other computers on the Internet, but other computers on the Internet cannot send a connection request to a computer on the intranet. In a local area network, only one computer needs to be connected to the Internet, and you can use NAT to share the Internet connection, so that other computers in the LAN can also access the Internet.

Related information

Internet designers reserved IPv4 addresses.

A part of the space is used for private addresses, and the IPv4 addresses in the private address space are called private addresses, and these addresses will never be assigned as public addresses, so the private addresses will never be duplicated with the public addresses, and the server that is the gateway has an IP address of the gateway.

The IP of other intranet computers can be set according to it.

The premise is that the first three digits of the IP should be the same as it, and the fourth can be selected from 0-255 but it should be different from the IP of the server, and the Internet connection sharing of Windows operating system, Sygate, Winroute, UNIX Linux's NATD and other software all use the NAT protocol to share the Internet connection. Almost all ISPs provide intranet Internet access based on the NAT protocol.

The above content refers to: Encyclopedia - Intranet IP

The same subnet mask is called the same network segment, for example, if a class C address is not divided into subnets, then his subnet mask is that is, these are unchanged is the same network segment, and it doesn't matter if the subnet is divided, such as which network segment is above, to divide 5 subnets, then it is necessary to get 3 bits from the host bit, because 2 to the 3rd power = 8 can meet 5 subnets.

So the back 8 for the binary should be 11100000, then the subnet mask can be the front mold burning Sun is inconvenient, the back can be 00100000, 01000000, 01100000, 10000000, 10100000 The five subnet masks are:, so the available segment of this network segment town IP should be from, if your IP is not the network segment of this chain, then it will not work, roughly should mean this, If you don't understand, you're looking at something else, something else, and so on.

Router. A router (also known as a pathfinder) is a computer network device that can transmit data packets through a network to a destination (selecting the transmission path of data), a process called routing.