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Cisco 642-780 Exam -

Free 642-780 Sample Questions:

Q: 1
Which three MPLS services require MPLS layer 2 VPNs? (Choose three)
A. Any-to-any interworking
B. Central services VPN
Answer: A, C, D

Q: 2
A service provider is running OSPF and has turned the network for fast convergence. The service provider has determined that its routers should also be configured for LDP synchronization. If the service provider follows ITIL-based practices, how should this change be treated?
A. As a standard change
B. As a minor change
C. As a major change
D. As an emergency change
Answer: D

Q: 3
What are three characteristics that define MP-BGP performance? (Choose three)
A. Convergence upon failure and recovery
B. Time to establish a tunnel
C. Import and export of VPNv4 routes
D. Time to complete a SPF calculation
E. Route table scanning for changes
F. Time to synchronize with LDP
Answer: C, E

Q: 4
A cisco 7600 series Router is experiencing high CPU utilization and poor forwarding performance. Investigation reveals that packet forwarding has been punted to the RP. What are two possible causes of this behavior? (Choose two)
A. The routing table is too large
B. Liberal retention mode has been disabled
C. An insufficient number of flow masks are configured
D. A large number of access list entries are configured
E. IGP timers need to be returned to improve routing convergence
Answer: B, D

Q: 5
You have implemented IMPLS-TE on the core and enabled Fast Reroute. BFD is configured on the core facing links. Every thing was working normally until last month when you added video service on the network. Because of business requirements, video packets are treated as high priority and 70% of bandwidth is allocated for the low latency queue. Recently you noticed BFD session losses and MPLS-TE tunnel flaps on the network. Which parameter should you have mentioned proactively to avoid this issue?
A. BFD session timers and hello message
B. MPLS-TE tunnel bandwidth and utilization
C. QoS drops each class of service on core-facing links
D. CPU utilization on the PE routers
E. Latency and jitter between PE routers
Answer: A

Q: 6
Which decode corresponds correctly to this MPLS header. 0x00 0x04 0xAB 0xFE?
A. Label: 0004, Exp AB. S:1.TTL:7E
B. Label: 0004A. TTL:BF.Exp:8. S:0
C. Label: 0004A. Exp:8.S:0
D. Label: 0004. TTL:AB.Exp:7E.S:1
Answer: B

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