Which layer does the tcpip protocol belong to?

The tcpip protocol belongs to the third layer, the Internet layer; IP is responsible for transmitting data from source to destination. It is not responsible for ensuring transmission reliability, flow control, packet order and other host-to-host protocols. Pretty average service.

IP protocol is the Internet Protocol and works on the third layer, the Internet layer.

IP does not provide reliable transmission services. It does not provide end-to-end or (routing) node to (routing) node confirmation. There is no error control for data. It only uses the check code of the header. It does not provide retransmission and flow control. If an error occurs, it can be reported through ICMP, which is implemented in the IP module.

The responsibility of IP is to transmit data from source to destination. It is not responsible for ensuring delivery reliability, flow control, packet ordering, and other services common to host-to-host protocols.

Level division of TCP/IP protocol:

TCP/IP protocol does not fully comply with OSI’s seven-layer reference model, OSI (Open System Interconnect) It is a traditional open system interconnection reference model and a 7-layer abstract reference model of a communication protocol, in which each layer performs a specific task. The purpose of this model is to enable various hardware to communicate with each other on the same level.

These 7 layers are: physical layer, data link layer (network interface layer), network layer (network layer), transport layer (transport layer), session layer, presentation layer and application layer (application layer) . The TCP/IP communication protocol adopts a 4-layer hierarchical structure, and each layer calls the network provided by the next layer to complete its own needs.

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