Two home office computers are connected to a switch by Ethernet cables. - LAN, Three government buildings in the same city connect to a cable company over coaxial cables. - MAN, A cell phone connects to a Bluetooth headset. - PAN, A financial institution connects its branches through a telecommunications service provider. - WAN,

排行榜

视觉风格

选项

切换模板

恢复自动保存: