Shulou(Shulou.com)06/01 Report--

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:

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