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A network switch is a computer networking device that links network segments or network devices. The term commonly refers to a multi-port network bridge that processes and routes data at the data link layer (layer 2) of the OSI model. Switches that additionally process data at the network layer (layer 3) and above are often called layer-3 switches or multilayer switches. A network switch is made up of network switch components.

Cisco WS-CAC-4000W-US=, 電源, 黑色, 4000 W, 110 - 220 V, 50 - 60 Hz, 30 A

Cisco WS-CAC-4000W-US=. 產品類型: 電源, 產品色彩: 黑色. 總功率: 4000 W, 交流電（AC）輸入電壓: 110 - 220 V, 交流電（AC）輸入頻率: 50 - 60 Hz

WS-CAC-4000W-US=

Cisco WS-CAC-4000W-US= 網路交換元件 電源

Cisco WS-CAC-4000W-US= 網路交換元件 電源

Cisco WS-CAC-4000W-US= 網路交換元件電源