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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-X4920-GB-RJ45, 银色, 1 Gbit/秒, 有线型, Ethernet, Fast Ethernet, Gigabit Ethernet, 188 x 209 x 49 mm, 700 g

Cisco WS-X4920-GB-RJ45. 产品色彩: 银色. 数据传输率: 1 Gbit/秒, 连接方式: 有线型, 网路功能: Ethernet, Fast Ethernet, Gigabit Ethernet. 尺寸（宽 x 深 x 高）: 188 x 209 x 49 mm, 重量: 700 g. 兼容性操作系统: Cisco IOS

WS-X4920-GB-RJ45

Cisco WS-X4920-GB-RJ45 网络开关元件