單項選擇題In which state can BGP peers exchange Update messages？（）

A.Active
B.OpenSent
C.OpenConfirm
D.Established
E.Idle


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1.單項選擇題In PIM-SM operations， the first router connected to the multicast source sends the Register message towhich device？（）

A.Multicast source
B.Multicast receiver
C.RP
D.RP mapping agent
E.Designated Router （DR）

3.單項選擇題What is the role of Forwarding Equivalence Class （FEC） in MPLS？（）

A.FEC determines how IP packets are forwarded in MPLS LSP.
B.FEC determines how to establish an LSP path.
C.FEC determines how a group of IP packets are mapped to an LSP.
D.FEC determines how MPLS labels are stacked in LSP.
E.None of above.

4.單項選擇題The IPv6 address FE80：：656：78FF：FE9A：BCDE is what type of address？（）

A.Site-local
B.Link-local
C.Multicast
D.None of the above

6.單項選擇題Using more than one label on a single packet is required in what context？（）

A.MPLS TE
B.MPLS VPN
C.When CEF switching and Label switching is done
D.In all the above circumstances

7.單項選擇題Which of the following processes are likely to be found in a microkernel？（）

A.Lightweight messaging
B.Memory management
C.Hardware abstraction
D.Host stack
E.Process scheduling
F.All of the above

8.多項選擇題What are BCP 38 （Best Common Practices 38）/RFC 2827 Ingress Packet Filtering Principles？（）

A.Filter Smurf ICMP packets.
B.Filter as close to the core as possible
C.Filter as close to the edge as possible
D.Filter as precisely as possible
E.Filter both source and destination where possible

9.單項選擇題If two routers， both reachable from one another， originate functionally equivalent type 2 external- LSAs （i.e，same destination， cost and non-zero forwarding address ）， Which of the following statements wouldapply ？（）

A.Two LSAs will exist in the network for this destination， and both will be used
B.Two LSAs will exist in the network for this destination， but only the one generated by the highest RID ASBR will be used
C.Only the LSA generated by the highest RID ASBR will exist in the network
D.Only the LSA generated by the lowest RID ASBR will exist in the network

10.多項選擇題Assume two routers on the same subnet， R1 and R2， both configured for HSRP. R1 has a priority of 120.Which of the following HSRP interface configurations will always result in the R2 becoming the primary？（）

A.standby 1 priority 110
B.standby 1 priority 120
C.standby 1 priority 130
D.standby 1 priority 110 preempt
E.standby 1 priority 120 preempt
F.standby 1 priority 130 preempt