It removes the top label in the MPLS label stack.
It adds a top label in MPLS label stack.
It replaces the top label in the MPLS label stack with another value.
It replaces the top label in the MPLS label stack with a set of labels.
None of above.
第1题：
The router SIS-R has been configured in a CIS network. As a network administrator, you were required to enable MPLS on that router.Which of the following description is making sense on the basis of the output information?（）
A. CEF switching is only needed to forward labeled packets.
B. CEF switching is needed on both ingress and egress interfaces on which MPLS is enabled.
C. Interface-level CEF switching is needed only on egress interfaces that are sending IP packets on which the egress LSR performs the label imposition process.
D. Interface-level CEF switching is needed only on ingress interfaces that are receiving IP packets on which the ingress LSR performs the label imposition process.
第2题：
Why is it appropriate to use conditional label advertising when deploying MPLS? （）
第3题：
A.Multi ProtocolLabel Switching
B.Multi PathLabel Switching
C.Multi plexLabel Switching
D.Multiprovision Label Switching
第4题：
What is the action of "pop" in the context of MPLS switching？（）
第5题：
As a network administrator, you are required to deploy MPLS technology. During the deployment, it is recommended to apply conditional label advertising. What is most probably the reason for that?（）
第6题：
A. to make CEF tables smaller
B. to enable label switching on the frame mode interface
C. to restrict MPLS availability to predefined time periods
D. to restrict label switching to a limited number of networks
E. to restrict end users from seeing the routers in the MPLS network
第7题：
In the context of MPLS，what is the correct action to be performed when an aggregate label is received ？（）
第8题：
不属于电子邮件协议。
A．POP3
B．SMTP
C．IMAP
D．MPLS
第9题：
Using more than one label on a single packet is required in what context？（）
第10题：
MPLS标签操作类型包括（）。