Content provider: Jinniu District Wudi Software Development Studio
Chapter one: Computer network overview
Basic concept of computer network
1. Definition of computer network
A computer network is a collection of interconnected, autonomous computers
[B]. The origin of computer networks
C. Internet Service Provider [ISP]
2. Definition of the Agreement
A. Network protocols
B. Three elements of network protocol
3. Functions of computer networks
The function of computer network is to achieve rapid information exchange between different hosts. The core function is to achieve resource sharing
A. Hardware resource sharing
Concept: Over a computer network, one host can share hardware resources that use another host.
B. Software resource sharing
Concept: Hosts on the network can remotely access and use all kinds of large software running on the server computer.
C. Information resource sharing
Concept: Information exchange supported by computer networks
4. Classification of computer networks
A. Classification by coverage
B. Classification by topology
1) Star topology
2) Bus topology
3) Ring topology
4) Mesh topology
5) Tree topology
6) Hybrid topology
C. Classification by switching mode
D. Click network user attributes
Second, computer network structure
1. Network edge
2. Access the network
Access to the network:
Ethereum: limited LAN. WiFi: Wireless LAN
3. Network core
Data exchange technology
1. The concept
Classification of 2.
A. Circuit switching
B. Message Exchange [alias: Message Exchange]
C. Packet switching
Four, computer network performance
Expand knowledge:
1. Rate and bandwidth
A. rate
B. the bandwidth
2. The time delay
3. Latency bandwidth product
4. The packet loss rate
5. The throughput
5. Computer network architecture
1. Definition of computer network architecture
2.OSI reference model
3. Relevant terminology
4.TCP/IP reference model
5. Five-layer reference model
A brief history of the development of Computer Networks and Internet
