网络中经常使用DDN服务，请选出DDN的优点（）

网络中经常使用“帧中继”服务，请选出帧中继的优点（）

默认情况下，IGRP衡量路径好坏时，考虑的因素为（）

交换机的三大功能为（）

You are an administrator of the Ezonexam switched network and your goal is to reduce some of the administrative overhead on your network. You plan on achieving this by configuring a new VLAN for each department in the Ezonexam network.

You need to configure an 802.1Q link on a Ezonexam switch. Which commands, when used together, would do this? (Select two answer choices)