R1，R2，R3 are all in same ospf area， there is a virtual link between R1 and R3. Pls answer： Are the hello packets exchanged between the virtual link？
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A.upon a port state change
B.upon receiving a topology change notification
C.when transitioning from discarding to forwarding
D.when transitioning from forwarding to discarding
E.only when changing from listening to discarding
F.when CAM resources have been completely used up
A.it is newer
B.it has smaller timers
C.it has less overhead
D.it is not timer-based
Refer to the exhibit. Which of these is applied to the Bearer class？（）
A.WRED
B.traffic shaping
C.packet marking
D.packet classification
E.FIFO queuing within the class
Refer to the exhibit. Which switching feature is being tested？（）
A.loop guard
B.PortFast
C.root guard
D.BDPU guard
最新試題
what is the advantage of policing opposite to shaping？
A network administrator is troubleshooting the OSPF configuration of routers R1 and R2.The routers cannot establish an adjacency relationship on their common Ethernet link.The graphic shows the output of the show ip ospf interface e0 command for routers R1 and R2.Based on the information in the graphic,what is the cause of this problem?（）
SPT初始狀態(tài)之后的一個狀態(tài)是什么？
如何實現(xiàn)擁塞避免？
hsrp speak狀態(tài)是什么意思？
what is four ospf area type？
Refer to the exhibit.Which statement describes DLCI 17?（）
The following configuration line was added to router R1 Access-list 101 permit ip 10.25.30.00.0.0.255 any What is the effect of this access list configuration?（）
what is the disadvantage of policing？
什么是NAT？