Refer to the exhibit. Look at the command output. What would be the most probable reason for this port-ID mismatch？（）
A.spanning-tree misconfiguration
B.speed mismatch configuration
C.cabling problem
D.configuration problem
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Refer to the exhibit. According to the output of the command show tag-switching forwarding-table， which four of these statements are true？（）
A.Packets to the IP address 10.10.10.5/32 will be tagged with "17" toward the next hop.
B.Label "19" will be advertised to MPLS neighbors so that they can use this label to reach the IP address 10.10.10.6/32.
C.IP address 10.10.10.4/32 is directly connected to the neighbor router on serial 3/0.
D.Packets arriving with label "17" will be forwarded without any label toward serial 4/0.
E.Packets arriving with label "20" will be forwarded with label "21" after label-swapping.
F.Label "20" is advertised to MPLS neighbors so that they can use this information to reach the prefix 10.10.10.8/32.
A.Incorrect VTP domain
B.Incorrect VTP password
C.Incorrect VTP mode
D.Incorrect VTP configuration revision
A.Clear the MAC address table in the switch.
B.Clear the ARP cache in the switch.
C.Clear the ARP cache in the end devices.
D.Clear the ARP cache in the application servers.
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Refer to the exhibit.Which statement describes DLCI 17?（）
What is the three main step of using the QoS feature with MQC command line interface？
A default Frame Relay WAN is classified as what type of physical network?（）
Which of the following describes the roles of devices in a WAN?（）
four switches， which one will be root switch.（no pic）.
What field in IP packet is used for classification by QOS？
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?（）
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