计算机网络的基本概念
1.计算机网络的定义:
计算机网络是指将地理位置不同的具有独立功能的多台计算机及其外部设备,通过通信线路链接起来,在网络操作系统,网络管理软件及网络通信协议的管理和协调下,实现资源共享和信息传递的计算机系统。
2.计算机网络的组成:
- 终端系统/资源子网:提供共享的软件资源和硬件资源。
- 通信子网:提供信息交换的网络结点和通信线路。
3.计算机网络的类型:
- 按照拓朴分类:
- 星型结构
- 树形结构
- 总线型结构
- 环形结构
- 网状结构
- 按照范围分类:局域网LAN 城域网MAN 广域网 WAN 补充:个人区域网PAN 互联网Internet。
- 按照传输方式分类:
- 有线网络:
- (IEEE802.3)
- ( IEEE802.11)
- 无线网络:
- WPAN无线个域网
- WLAN无线局域网(wireless)
Basic concept of computer network
1.Definition of computer network:
Computer network refers to a computer system that links multiple computers with indepent function in different geogeraphical locations and their external devices through communication lines to realize resource sharing and information transmission under the management and coordination of network operating system, network management software and network communication protocol.
2.计算机网络的组成:
- Terminal system/resource subnet:provide shared software resources and hardware resources.
- Communication subnet:network nodes and communication lines providing information exchange.
3.计算机网络的类型:
- Classified by topology:
- Star structure
- Tree structure
- Bus structure
- Annular structure
- Reticular structure
- Classified by scope:LAN MAN WAN supplement:PAN Internet。
- Classified by transmission mode:
- Wired network:
- (IEEE802.3)
- ( IEEE802.11)
- Wireless network:
- WPAN
- WLAN(wireless)