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QUESTION 77
Which IOS show command can be used to examine the MPLS VPN label stack for a prefix?
A. show ip route vrf {vrf-name} {ip-prefix}
B. show ip cef {ip-prefix}
C. show ip cef vrf {vrf-name} {ip-prefix}
D. show ip vrf detail
E. show ip bgp vpnv4 all
F. show mpls interfaces

Correct Answer: C Section: (none) Explanation
Explanation/Reference:
QUESTION 78
Using OSPF as the CE-PE routing protocol, when and which router will set the down bit?
A. The PE router will set the down bit when redistributing routes from MP-BGP into OSPF.
B. The PE router will set the down bit when redistributing routes from OSPF into MP-BGP.
C. The CE router will set the down bit when propagating the OSPF route to the PE router.
D. The PE router will set the down bit when propagating the OSPF route to the CE router.
E. The P router will set the down bit when propagating the route to another P router.
F. The PE router will set the down bit when propagating the route to another PE router over MP-BGP.

Correct Answer: A Section: (none) Explanation
Explanation/Reference:
QUESTION 79
Which type of VPN implementation is simple and cost effective because all sites connect only to the PE router and as a result optimum routing between sites is enabled by default?
A. peer-to-peer VPN
B. overlapping VPN
C. hub-and-spoke overlay VPN
D. fully-meshed overlay VPN
E. client-server VPN
Correct Answer: A Section: (none) Explanation

Explanation/Reference:
QUESTION 80
Which three fields must be included in MPBGP updates between PE routers in an MPLS network? (Choose three.)
A. VPNv4 address
B. label used for VPN packet forwarding
C. AS path
D. Site of Origin
E. TE path designator

Correct Answer: ABC Section: (none) Explanation
Explanation/Reference:
QUESTION 81
A pair of MPLS routers, operating in the default frame-mode, are connected over two parallel links. Which of the following describes what will happen when they try to establish LDP sessions?

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QUESTION 135
Which VRF parameters must be specified for a VRF to become operational?
A. RD
B. Interface
C. Import RT.
D. Export RT.

Correct Answer: A Section: (none) Explanation
Explanation/Reference:
QUESTION 136
How are route targets used to build virtual routing tables in the PE-routers?
A. Route targets are prepended to each entry in the VRF to identify which VPN owns the route.
B. Route targets are prepended to the customer’s IP address to create unique address spacing for each VPN.
C. Every customer route exported from a VRF is tagged with appropriate export route targets. VPN routes received by a PE-router are matched against import route targets configured in a CRF.
D. Every customer route received from the CE is matched against import route targets. If there is match, the route is added to the VRF. Every route received from the neighbor PE-router is entered in the VRF. It is then matched against export route targets.

Correct Answer: C Section: (none) Explanation
Explanation/Reference:
Explanation: Route distinguisher is prepended to IP address to create VPN address, not Route target.
QUESTION 137
When should you disable redistribution of IPv4 routing updates between MP-BGP neighbors?
A. When the network only supports MPLS VPNs.
B. When the network is using OSPF or ISIS instead of I-BGP as the network IGP.
C. When you want to reduce the number of labels that the P-router needs to store.
D. When you want to reduce the number of routes that the P-routers must store in their global BGP routing table.
Correct Answer: B Section: (none) Explanation

Explanation/Reference:
QUESTION 138
With MPLS VPNs, which four elements will be included in an MP-BGP update exchange between the PE routers? (Choose two)
A. VPNv4 Address
B. Route tag
C. Label used for VPN packet forwarding
D. Mandatory BGP attributed like As-Path and Next-Hop
E. Route target
F. Implicit null label used for PHP operation

Correct Answer: ACDE Section: (none) Explanation
Explanation/Reference:
QUESTION 139
The VPN named my_vpn is operating on interface s0/0 a PE-router. The CE-PE routing protocol isRIP.

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