[问答题] 计算机网络的功能有哪些？

骨料加工厂的位置应尽可能接近拌和楼。 喷灌的主要灌水质量指标有哪几个，如何定义？ 硬盘是（）的一种。 ["内存","外存","主机","接口电路"] Which Cisco product is a software component that blocks unwanted connections and provides other gateway security functions for small business?（） ["Cisco Firewall Services Module (FWSM)","Cisco Secure Access Control Server (ACS)","Cisco Private Internet Exchange (PIX) Firewall","Cisco Internetwork Operating System (IOS) Firewall"] 患者吴某，男，83岁，呼吸衰竭，神志不清，咳痰无力，使用口咽通气道，护士给予的护理措施不正确的是：（） ["定时检查口咽通气道是否保持通畅","检查牙齿松动情况","使用胸部振颤法促进排痰","给予翻身叩背","指导患者有效咳痰"] 计算机网络的功能有哪些？