SFP / SFP+收发器
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热插拔模块，将电信号转换为光信号（或反之），用于高速网络连接。
SFP（1 Gbps）和SFP+（10 Gbps）收发器插入交换机和路由器，允许在铜缆和光纤连接之间灵活选择。QSFP28可处理100 Gbps。DAC（直连铜缆）SFP+线缆为短距离机架间连接提供了无需光转换的更便宜替代方案。