OSI reference Model of Network Technology
Definition of computer Network and OSI reference Model
1. The definition of computer network:
The functions of the computer network:
The basic composition of a computer network:
Logical structure of computer network: resource subnet, communication subnet
Classification of computer networks:
Classified by geographical scope: local area network, metropolitan area network, wide area network
2. The concept of network protocol:
OSI reference model, from low layer to high layer, are physical layer, data link layer, network layer, transport layer, session layer, presentation layer and application layer.
Physical layer:
Data Link layer:
Network layer:
Transport layer:
Session layer:
Presentation layer:
Application layer:
