单项选择题 You need to configure two Company routers for high availability.  Which protocol enables a group  of routers to form a single virtual router and use the real IP address of a router as the gateway  address？ （）

多项选择题 You have just purchased a new Cisco 3560 switch running the enhanced IOS and need configure  it to be installed in a high availability network. On a 3560 EMI switch，  which three types of  interfaces can be used to configure HSRP？（）

单项选择题 Whichofthecharacteristicsbelowisassociatedwiththe（QoS）IntegratedServicesModel？（）