题目内容：
根据下列题干，回答题：(1) is a channel's capacity which directly reflects the data transfer rate of the channel. (2) functions in a NetWare network which is used to define addressing schemes. (3) is a network layer device that suports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains. (4) 。is the popular LAN develped under the direction of the IEEE 802.3. (5) is a device which enables digital microcomputers to communicate across analog telephone lines.
请选择（1）处最佳答案
参考答案：
答案解析：