Rebirth 642-887 Exam Study Guides With New Update Exam Questions

Q1. Referring to the Cisco IOS XR show command output exhibit,

what are three possible reasons that the GigabitEthernet0/1/0/10 LDP IGP sync status is not ready? (Choose three.)

A. GigabitEthernet0/1/0/10 is not configured to run LDP.

B. Graceful restart is not configured on the peer.

C. The LDP neighbor on GigabitEthernet0/1/0/10 is not up.

D. The OSPF neighbor on GigabitEthernet0/1/0/10 is not up.

E. LDP is up on GigabitEthernet0/1/0/10, but no label bindings have been received from the peer.

F. GigabitEthernet0/1/0/10 is a member link of Bundle-Ether9000.

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Q2. When implementing MPLS DS-TE on Cisco IOS XR routers, all aggregate Cisco MPLS TE traffic is mapped to which class type by default?

A. class-type 0 (bandwidth global pool)

B. class-type 1 (bandwidth subpool)

C. class-type 2 (bandwidth priority)

D. class type class-default (bandwidth best-effort)

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Q3. The Cisco IOS and IOS XE qos pre-classify command allows which kind of packet classification on IP packets that are encapsulated with GRE and IPsec?

A. allows for packets to be classified based on the ToS byte values before packet encryption

B. allows for packets to be classified based on the ToS byte values after packet encryption

C. allows for packets to be classified based on the packet payload before packet encryption

D. allows for packets to be classified based on the packet payload after packet encryption

E. allows for packets to be classified based on the packet header parameters other than the ToS byte values after packet encryption

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Q4. Which three network services can be implemented using MPLS within the service provider IP NGN core? (Choose three.)

A. Layer 2 VPNs

B. Layer 3 VPNs

C. traffic engineering

D. IntServ traffic engineering tunnels

E. encrypted LSPs

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Q5. Which affinity and mask value will match the link affinity that has 0x0F in the first 8 bits and 0x01 in the last 8 bits, and the middle 16 bits can be any value?

A. affinity 0x0F000001 mask 0x0F000001

B. affinity 0x0F000001 mask 0x00000000

C. affinity 0x0F000001 mask 0x11111111

D. affinity 0x0F000001 mask 0x11000011

E. affinity 0x0F000001 mask 0xFF0000FF

F. affinity 0x0F000001 mask 0x00FFFF00

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Q6. When using the tunnel mpls traffic-eng path-option 1 explicit name test command in Cisco MPLS TE tunnel configurations, the test explicit-path configuration will consist of a list of which values?

A. tunnel endpoint

B. resource class affinity

C. MPLS label

D. IP address

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Q7. Which two features are used to provide Cisco MPLS TE node and link protection? (Choose two.)

A. autoroute

B. fast reroute

C. backup tunnels

D. BFD

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Q8. What is an important requirement with MPLS applications like Layer 3 MPLS VPNs?

A. All the PE routers loopback addresses should be summarized to reduce the number of routing table entries in the core routers.

B. Targeted hellos are required between all the PE routers.

C. An end-to-end LSP is required between the PE routers.

D. The LSPs that are built between the PE routers must be symmetrical (bidirectional).

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Q9. What are the four fields inside the MPLS shim header? (Choose four.)

A. EXP

B. TTL

C. Version

D. S

E. Length

F. Label

G. Type

H. FCS

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Q10. Which three statements are correct regarding a Cisco MPLS TE? (Choose three.)

A. A Cisco MPLS TE tunnel maps onto an LSP path.

B. Tunnels are bidrectional by default.

C. Packets that are mapped into a Cisco MPLS TE tunnel will have two labels, with the top label indicating what the tail-end router should do with the packet.

D. A tunnel that is created with a priority of 0 can pre-empt an existing tunnel with a priority of 7.

E. CBR takes into account link resource and traffic tunnel attributes.

F. RSVP is used between customer routers.

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