As a CCNA candidate,you must have a firm understanding of the IPv6 address structure.Refer to IPv6 address,could you tell me how many bits are included in each filed?（）

QoS機(jī)制中的分類，采用ip數(shù)據(jù)包中的哪個(gè)字段？

Which of the following are key characteristics of PPP?（）

four switches， which one will be root switch.（no pic）.

R1 will choose which path to reach 10.1.0.0？

Refer to the exhibit.The network administrator is in acampus building distant from Building B.WANRouter is hosting a newly installed WAN link on interface S0/0.The new link is not functioning and the administrator needs to determine if the correct cable has been attached to the S0/0 interface.How can the administrator accurately verify the correct cable type on S0/0 in the most efficient manner?（）

hsrp speak狀態(tài)是什么意思？

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?（）

Refer to the exhibit.How many broadcast domains exist in theexhibited topology？（）

Local Preference？