Ip Address

Topic: IP address Network legal and information security Computer addresses on the Internet are often referred to as IP addresses (Internet Protocol). This is the number of 32 bits (4 bytes), which is usually written as follows. Since xxx.xxx.xxx.xxx can represent any number from 0 to 255 per byte, the possible minimum and maximum IP addresses are 0.0. 0.0 ~ 255.255.255.255 Understanding IP address All applications on the Internet generate logs and record the IP addresses of all interactive computers, so you need to know the IP address.

You may have heard the IP address before. An IP address, like an actual address, is a unique identifier that each computer has. Internet Protocol (IP) is the most basic level of messaging protocol. Only 20 bytes of data including the target IP address and sender IP address are used. UDP is used for high speed and efficient transmission, but it is not always reliable. It basically sends a lot of packets, it is done. Although TCP takes a little more time, reliability is higher because it confirms the arrival of the actual message. This means that a confirmation message was received at the other end.

Pay particular attention when displaying the number of hosts on the network. The first IP address in the network is the network address, and the last IP address is always the broadcast address. Therefore, IP address 1.1.1.0 and IP address 1.1.1.255 can not be used. These are special reservation addresses, but some computers can use the network address as the actual computer address. "Subnetting" is to divide a single network into smaller networks. To do this, you need to add more bits (more numbers) to the subnet mask. Traditionally, we are used to seeing subnet masks that look like 255.0.0.0, 255.255.0.0, or 255.255.255.0. However, the subnet mask will also be like 255.255.128.0 or 255.255.255.224. In either case it is clear that the network is subnetted to divide one network into smaller networks.

An IP address is an address used to uniquely identify a device on an IP network. The address consists of 32 binary bits that can be divided into a network part and a host part using a subnet mask. The 32 bit binary bit is divided into 4 octets (1 octet = 8 bits). Each octet is converted to a decimal number and is separated by periods (dots). Therefore, IP addresses are said to be represented in dotted decimal format (eg, 172.16.181.100). The value of each octet is a decimal number from 0 to 255, or a binary number from 00000000 to 11111111.

You may know what the IP address is: a number that identifies the device on the network. But what else do I need to know? The IP address consists of 32 bits (that is, IPv4 address). We usually consider an IP address similar to 1.1.1.1, but in fact it can be converted to 4 sets of 8 binary bits (see binary to decimal conversion for details). Each set of binary bits can only represent numbers from 0 to 255. This is why your IP address range is only 0.0.0.0 to 255.255.255.255