多项选择题
A company is installing IP phones. The phones and office computers connect to the same device. To ensure maximum throughput for the phone data, the company needs to make sure that the phone traffic is on a different network from that of the office computer data traffic. What is the best network device to which to directly connect the phones and computers, and what technology should be implemented on this device (Choose two.)（）。
A.hub B.router C.switch D.STP E.subinterfaces F.VLAN
单项选择题 Refer to the exhibit. What will happen to HTTP traffic coming from the Internet that is destined for 172.16.12.10 if the traffic is processed by this ACL?（）
多项选择题 国际上负责分配IP地址的专业组织划分了几个网段作为私有网段，可以供人们在私有网络上自由分配使用，以下属于私有地址的网段是（）。
单项选择题 X．25协议是哪两种设备进行交互的规程？（）
