先决条件 – 区域网络类型 – LAN、MAN 和 WAN
LAN代表局域网。它是一组允许各种连接设备之间进行通信的网络设备。私有制控制的是局域网而不是公众。 LAN 的传播延迟比 MAN 和 WAN 短。它涵盖了较小的区域，如学院、学校、医院等。
MAN代表城域网。它覆盖的区域比局域网更大，如小城镇、城市等。城域网将两台或多台位于同一城市或完全不同城市的计算机连接起来。 MAN 很昂贵，应该或可能不属于一个组织。
WAN代表广域网。它覆盖的区域比 LAN 以及 MAN(例如国家/大陆等)更大。WAN 很昂贵，应该或可能不属于一个组织。 PSTN 或卫星媒体用于广域网。
让我们看看三者之间的区别：LAN、MAN 和 WAN。
| LAN | MAN | WAN |
|---|---|---|
| LAN stands for local area network. | MAN stands for metropolitan area network. | WAN stands for wide area network. |
| LAN’s ownership is private. | MAN’s ownership can be private or public. | While WAN also might not be owned by one organization. |
| The transmission speed of a LAN is high. | While the transmission speed of a MAN is average. | Whereas the transmission speed of a WAN is low. |
| The propagation delay is short in a LAN. | There is a moderate propagation delay in a MAN. | Whereas, there is a long propagation delay in a WAN. |
| There is less congestion in LAN. | While there is more congestion in MAN. | Whereas there is more congestion than MAN in WAN. |
| LAN’s design and maintenance is easy. | While MAN’s design and maintenance is difficult than LAN. | Whereas WAN’s design and maintenance is also difficult than LAN as well MAN. |
| There is more fault tolerance in LAN. | While there is less fault tolerance. | In WAN, there is also less fault tolerance. |