多项选择题 Refer to the exhibit. The Layer 2 network uses VTP to manage its VLAN database. A network designer created all VLANs on the VTP server （switch 1） and it has been advertised through VTP to all other VTP clients （switches 2 through 4）. Due to network growth，a network operator decided to add a new switch between switch 1 and switch 3. The network operator has been instructed to use a refurbished switch and use a VTP client. Which three of these factors should the network operator consider to minimize the impact of adding a new switch？（）

多项选择题 WhichtwooftheseelementsneedtobeconfiguredpriortoenablingSSH？（）

单项选择题 Whentroubleshootinganetwork，theoutputofthecommandshowinterfacesindicatesalargenumberofrunts.Whatisarunt？（）