[单选] Which Cisco product is a software component that blocks unwanted connections and provides other gateway security functions for small business?（）
A . Cisco Firewall Services Module (FWSM) B . Cisco Secure Access Control Server (ACS) C . Cisco Private Internet Exchange (PIX) Firewall D . Cisco Internetwork Operating System (IOS) Firewall
硬盘是（）的一种。 内存。 外存。 主机。 接口电路。
情感是在人的（）中产生的。
计算机网络的功能有哪些？
简述动作发展的基本趋势和儿童早期动作发展的个别差异。
计算机网络有哪几种拓扑结构？
Which Cisco product is a software component that blocks unwanted connections and provides other gateway security functions for small business?（）
