Meaning of Internet Protocol

When we use the Internet, we often say that the IP address is Internet Protocol. Internet protocol. In order to better understand this knowledge, we have summarized and sorted out the basic content. Now let's take a look at the specific meaning of the IP protocol.

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Cause

The Internet protocol is used to connect multiple Packet Exchange Networks. Before the Source and Destination addresses, it transmits something called a datagram. It also provides the data size re-assembly function, to meet the packet size requirements of different networks.

Range

The IP address is responsible for transmitting data from the source to the destination. It is not responsible for ensuring the transmission reliability, flow control, packet sequence and other services that are common for the host-to-host protocol.

Interface

The Protocol is called from the host to the host, and the protocol is used to call the local network protocol to transmit the datagram to the next gateway or target host. For example, TCP can call the IP protocol and send the destination address and source address as parameters during the call. The IP forms a datagram and calls the local network protocol.

Operation

IP address implements two basic functions: Addressing and segmentation.

An IP Address can send a datagram to a destination address based on the destination address included in the datagram header. During this process, the IP address is responsible for selecting the route for transmission. This routing function is called routing. If some networks can only transmit small data packets, IP addresses can re-assemble the data packets and indicate them in the header domain. The IP module includes these basic functions. These modules exist on each host and on the Internet, and these modules are especially on the gateway.) There are routing selection and other service functions. For IP addresses, there is no connection between data packets, and it is hard to say what connections or logical links are for IP addresses.

The Internet protocol uses four key technologies to provide services: service type, survival time, options, and header verification code.

Service type refers to the desired service quality. A service type is a parameter set, which represents the ability of the Internet to provide services. This type of service is used by the gateway to select the actual transmission parameters on a specific network, the next network to be routed, or the next gateway to route the datagram.

The survival time is the maximum time that a datagram can survive. It is set by the sender and processed by the route. If the survival time is zero when it does not arrive, discard this datagram. Option is important for control functions, but it is unnecessary for common communication.

The options include timestamp, security, and special routing.

The header Verification Code ensures correct data transmission. If the verification fails, the entire datagram is discarded.

The Internet Protocol does not provide reliable transmission services. It does not provide end-to-end or routing) node validation and does not control data errors. It only uses header verification codes, it does not provide re-transmission and traffic control. If an error occurs, use the ICMP Report, which is implemented in the IP module.