单项选择题
A. to configure a subinterface so that it can be applied to the primary interface in order to prevent exponential selective dampening
B. to suppress the effects of excessive interface flapping events on routing protocols and routing tables in the network
C. to introduce a nonconfigurable exponential delay mechanism
D. to allow the network operator to configure a router to automatically dampen and selectively identify a local interface that is failing
多项选择题 CIS .com recently acquired a smaller competitor. The acquired company is not currently using Cisco routers, so you have connected the two WANs via an authenticated PPP link. After configuration both routers, issuing the show interface s0/0 command on the Cisco Router shows the interface to be in the up/down state. Which two of these are possible causes? （）
单项选择题 You are working with a client to classify the different types of application traffic they will have on their network and to assign a QoS value to each traffic flow. The client has identified the following applications: Internet traffic, Oracle, network-based backups, AOL Instant Messenger, IP routing, voice, and voice signaling. Given these types of applications, how many different classes will need to be configured in QoS?（）
多项选择题 Which three of these items are found within the router advertisement message of IPv6 stateless autoconfiguration?（） (Choose three.)