What kind of IP address does 220 a b c belong to? 70

Network ID: used to identify the network where the host is located.

Host Number: Used to identify hosts in the network.

There are five categories of IP addresses, Class A reserved for ** institutions, Class B for medium-sized companies, Class C for anyone who needs them, Class D for multicast, Class E for experiments, and the number of addresses that can be accommodated varies by class.

Characteristics of Class A, B, and C IP addresses: When writing IP addresses in binary form, the first digit of Class A addresses is always O, the first two digits of Class B addresses are always 10, and the first three digits of Class C addresses are always 110.

1.Class A addresses.

1) The first byte of a Class A address is the network address, and the other three bytes are the host address.

is a private address (a so-called private address is an address that is not used on the Internet, but is used in a local area network).

Range (is a reserved address for round-robin testing.)

2.Class B addresses.

1) The first and second bytes of a Class B address are network addresses, and the other two bytes are host addresses.

3) Private addresses and reserved addresses for Class B addresses.

is a private address.

is a reserved address. If your IP address is automatically acquired, and you don't find a DHCP server available on the network. You'll get one of the IPs.

3.Class C addresses.

1) The 1st, 2nd, and 3rd bytes of a Class C address are network addresses, and the 4th byte is the host address. In addition, the first three digits of the first byte are fixed at 110.

is a private address. (

4.Class D addresses.

1) A Class D address does not distinguish between network address and host address, and the first four digits of its first byte are fixed at 1110.

5.Class E addresses.

1) Class E addresses are not divided into network addresses and host addresses, and the first five bits of the first byte are fixed at 11110.

The concept of IP is very broad, including brand, trademark, copyright, and very importantly, trade secrets, business models, business standards, etc. The amount of IP ownership is the most important sign to distinguish between manufacturing and creation, a country has too little IP, its industry or enterprise can only play the role of primary processor in the international division of labor.

To put it simply:

A Class A IP address consists of a 1-byte (8-bit each) network address and a 3-byte host address, with the highest bit of the network address having to be "0", i.e. the first numeric range is 1,126. Each Class A address can connect to 16387064 hosts, and the Internet has 126 Class A addresses.

2 Class B IP addresses.

A Class B IP address consists of a 2-byte network address and a 2-byte host address, and the highest digit of the network address must be "10", i.e. the first numerical range is 128 191. Each Class B address can connect to 64,516 hosts, and the Internet has 16,256 Class B addresses.

3 Class C IP addresses.

A Class C address consists of a 3-byte network address and a 1-byte host address, and the highest bit of the network address must be "110", i.e. the first numerical range is 192 223. Each Class C address can connect to 254 hosts, and the Internet has 2054512 Class C addresses.

It is a Class C IP address.

A Class C IP address refers to a four-segment IP address in which the first three segments are network numbers and the remaining segments are local computer numbers. If the IP address is represented in binary, the Class C IP address is composed of a 3-byte network address and a 1-byte host address, and the highest bit of the network address must be "110".

The length of the network identification in the Class C IP address is 24 bits, the length of the host logo is 8 bits, and the number of Class C network addresses is relatively large, with more than 2.09 million networks. Suitable for small-scale LANs with a maximum of 254 computers per network.

Class C IP ground disturbance address range binary representation is: 110000000 00000000 000000000 00000001 - 11011111 11111111 11111111 11111110).

IP is the abbreviation of Internet Protocol in English, which means "protocol for interconnection between networks", that is, a protocol designed for computer networks to connect with each other for communication. In the Internet, it is a set of rules that enable all computer networks connected to the Internet to communicate with each other, and prescribe the rules that computers should follow when communicating on the Internet.

A Class A networks use the first set of numbers to represent the address of the network itself, and the last three sets of numbers serve as the addresses of the hosts connected to the network. Assigned to large networks with a large number of hosts (direct individual users) and a small number of local area networks. For example, IBM's network.

The first and second sets of numbers represent the address of the network, and the last two sets of numbers represent the address of the host on the network.

The representation range of Class C addresses is: and the default netmask is: Class C addresses are assigned to small networks, such as general local area networks and campus networks, which can connect to the least number of hosts, and are managed by dividing the users into several network segments.

Class C networks use the first three sets of numbers to represent the address of the bridge network, and the last set of numbers as the host address on the network.

In fact, there are also Class D addresses and Class E addresses. However, the purpose of these two chain addresses is relatively special, and here is just a brief introduction: Class D addresses are called broadcast addresses, which are used by special protocols to send information to selected nodes. Class E addresses are reserved for future use.

Suppose that the two IP addresses are and the subnet mask is both.

We can know that the network identifiers of the two are and respectively, and they cannot communicate directly, so they cannot be ping. In order to be able to communicate with each other, you need to change the subnet mask to.

1) Convert the number of hosts to binary representation, and the total number of digits is n;

2) Set all mask addresses to 1, and then set all n bits to 0 from back to front, which is the subnet mask value.

1) 700 = 1010111100, the binary is a ten-digit number, n = 10

2) Set all the 10 bits of the subnet mask from back to front to 0, that is.

That's the subnet mask for 700 hosts.

The 26 in the preceding section represents the length of the mask address of the host ID, and there are 26 bits from top to bottom, that is, the address of the subnet mask.