Some data packet concepts of computer network transfer

Transfer from http://blog.csdn.net/wang7dao/article/details/18956401

packet, packet, packet, the unit that the information transmits in the Internet, the network layer realizes the packet delivery. A packet of records caught with a grab kit is a bag.


The Protocol data unit of the frame, frame, data link layer. We refer to the link layer groupings as frames.


Datagram, Datagram, the basic unit of data transmitted over a network, contains a header and the data itself, where the header describes the destination of the data and the relationship to other data. Can be understood as a grouping of transferred data. The basic unit of data that we transmit over the network is called a datagram.


The message segment, segment, composes each packet of the message. We refer to Transport layer groupings as message segments.


Message, message, generally refers to the complete information, the transmission layer to achieve message delivery. We refer to the group of information that is located at the application level as a message.


This shows that the clutch caught is the transport layer of the packet, so packet,frame,datagram,segment is in the same record, and Frame,datagram,segment is based on the protocol layer different to take a different name.

Some data packet concepts of computer network transfer