【名词&注释】
网络通信(network communication)、网络资源(network resources)、通信协议(communication protocol)、客户机/服务器模式、公开密钥加密(public key encryption)、工业界(industrial community)、安全性。、对称加密算法(symmetric encryption algorithm)、DES加密算法(des encryption algorithm)、必须有(must have)
[单选题]is a network layer device that supports multiple LAN interfaces and segments LANs into smaller collision and broadcast domains.
A. Repeater
B. Router
C. Bridge
D. Switch