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Testking cisco 642-381

Vendor: cisco
Exam Code: 642-381
Exam Name: FoundFE Foundation Express for Field Engineers (Others Certification )
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642-381 Q & A with Explanations + 642-381 Study Guide + 642-381 Preparation Labs

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QUESTION 1:
Which statement is true about the hardware requirements of MPLS?
A. Because you do not need to run a routing protocol on P-routers, they require less
memory than routers supporting classic IP routing.
B. Because of the additional processing and memory requirements needed to build the
LFIB, MPLS is only available on high end routers.
C. MPLS is available on low end routers, built their use is limited because of the
additional processing and memory requirements needed to build the LFIB.
D. Because P-routers do not need to carry routes outside the MPLD domain, they require
less memory than routers that support the same application using classic IP routing.
Answer: C
QUESTION 2:
If aggregation (summarization) were to be used on a network with ATM LSRs.
What would result?
A. LSPs would be broken in two.
B. There would be extra LFIB entries.
C. The size of the LFIB table would increase.
D. There would be extra LIB entries
Answer: A
QUESTION 3:
What is true of MPLS TE?
A. Only the ingress LSR must see the entire topology of the network.
B. Every LSR needs additional information about links in the network, available
resources, and constraints.
C. Every core router must be able to create an LSP tunnel on demand.
D. Both RSVP and CR-LDP are used in conjunction to establish traffic engineering (TE)
tunnels and to propagate the labels.
Answer: B
QUESTION 4:
What is a major drawback of using traditional IP routing over an ATM network
when connecting multiple sites?
A. Each ATM switch in the path has to perform Layer 3 routing lookup.
B. ATM virtual circuits have to be established between the different sites.
C. There is high ATM management overhead between the ATM switch and the router at
each site.
D. Each ATM switch has to be manually configured to participate in Layer 3 routing.
E. There is high PNNI overhead.-
Answer: B
Explanation:
Drawbacks of Traditional IP Forwarding IP over ATM
1) Layer 2 devices have no knowledge of Layer 3 routing information – virtual circuits
must be manually established.
2) Layer 2 topology may be different from Layer 3 topology, resulting in suboprtimal
paths and link use.
3) Even if the two topologies overlap, the hub-and-spoke topology is usually used
because of easier management.
QUESTION 5:
What is true of MPLS TE?
A. Only the ingress LSR must see the entire topology of the network.
B. Every LSR needs additional information about links in the network, available
resources, and constraints.
C. Every core router must be able to create an LSP tunnel on demand.
D. Both RSVP and CR-LDP are used in conjunction to establish traffic engineering (TE)
tunnels and to propagate the labels.
Answer: B

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Questions and Answers : 59 Q&As Updated: October 29th , 2008 Price: $89.99

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