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Q21. Due to recent acquisitions, a company's MPLS infrastructure is growing very quickly. Concerns arise about labeling each and every IP address on the service provider core network. The IP address space is designed as per following:
. Service provide ip address range is: 10.0.0.0/16
. All loopback addresses use subnet mask /32
. 10.0.0.0/24 range is used for loopback addresses
. All other subnet masks used for links are /24 and /25
Which command would significantly reduce the label allocations without compromising LDP functionalities?
A. ip prefix-list Llst1 deny 10.0.0./16 le 20 ge 25
!
mpls Idp label
allocate global prefix-list List1
B. access-list 1 permit 10.0.0.0 0.0.255.255
mpls Idp neighbor 10.0.0.1 labels accept 3
C. mpls Idp label
allocate global host-routes
D. mpls Idp password required for 10
!
access-list 10 permit 10.0.0.1
access-list 10 permit 10.0.0.2
access-list 10 permit 10.0.0.3
Answer: C
Q22. Refer to the exhibit. R1 and R2 are multicast routers running PIM over Serial1/0. The PIM adjacency on R1 is not forming with the given configuration. What command can be entered on R1 to resolve the issue?
A. no access-list 100 deny 103 any any
B. no access-list 100 deny udp any anyeq 103
C. no access-list 100 deny ip any host 224.0.0.1
D. no access-list 100 deny ip any host 224.0.0.2
Answer: A
Explanation:
All PIM protocols share a common control message format. PIM control messages are sent as raw IP datagrams (protocol number 103), either multicast to the link-local ALL PIM
ROUTERS multicast group, or unicast to a specific destination.
Reference: http://www.metaswitch.com/resources/what-is-protocol-independent-multicast-pim
Q23. When IPv6 is enabled on an interface, which three multicast addresses does the configured interface automatically join? (Choose three.)
A. FF01::2
B. FEC0::1
C. FF02:0:0:0:0:1:FF00::/104
D. FF02::1
E. FF01::1
F. FF02::2
G. FF02::D
H. FF02::5
Answer: C,D,F
Explanation:
http://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/4_1/configuration/guides/cli_4_1/clibook/ipv6.pdf https://www.iana.org/assignments/ipv6-multicast-addresses/ipv6-multicast-addresses.xml
Q24. Which network interface technology eliminates the need for an external transponder at service provider sites?
A. IPoDWDM
B. CWDM
C. SONET
D. SDH
Answer: A
Q25. Refer to the exhibit.
It displays the Router_3 FIB information without any OSPF LSDB optimization. An engineer wants to optimize the OSPF LSDB in accordance with RFC 1587 Considering the following restraints:
.Router_3 maintains full connectivity
.Router_2 requires the least configuration
In order to achieve the OSPF LSDB optimization on Router_3. which Cisco IOS command should the engineer use on Router_2?
A. area 1 nssa default-information-originate
B. area n nssa no-summary
area 1 nssa no-redistribution
C. area 1 nssa no-redistribution
area 1 nssa default-information-originate
D. area 1 nssa no-summary
E. area 1 nssa no-redistribution
F. area 1 nssa no-summary
area 1 nssa default-information-originate
Answer: F
Q26. In Multicast Inter-AS VPN context, which BGP attribute should you use to overcome the Option B limitation due to a rewritten originator next-hop address in the network?
A. connector
B. AS path
C. weight
D. originator
Answer: A
Q27. What is the PPMP label used for?
A. for the ingress replication model with BIDIR-PIM in an overlay model
B. only for the inter-AS mVPN models that use mLDP
C. for the partitioned mVPN model with PIM signaling in an overlay model
D. only for unicast over MPLS VPN
E. for all the default MDT and mVPN models
Answer: D
Explanation: http://lostintransit.se/tag/bgp/
https://tools.ietf.org/html/draft-rosen-l3vpn-mvpn-mspmsi-08#section-3.2.2.1
Q28. In a PE-CE scenario using OSPF as the routing protocol, a down-bit set can be advertised in which OSPF LSA type?
A. type 1 LSA
B. type 2 LSA
C. type 3 LSA
D. type 5 LSA
E. type 7 LSA
Answer: C
Q29. Refer to the exhibit:
A regional operations center recently set up a MPLS Inter-AS Option B solution for two service providers There is no intercommunication between CE1 and CE2 sites yet While troubleshooting this issue on the ASBR1 router, the operations engineer sees the following log:
BGP(4): 10.24.32.253 rcvd 100:101:40.72.97.0/24, label 136 -- DENIED due to: extended community not supported; What does this log mean?
A. The route-target value does not match the one in the local VRF
B. The community that was applied on ASBR 10.24.32.253 does not match the local policies
C. The bgp default route-target filter command is missing on both inter-AS ASBRs
D. The BGP command retain route-target all is missing
Answer: D
Q30. Refer to the exhibit. In the short-pipe QoS mode, this customer has QoS control for which two links? (Choose two.)
A. a
B. c
C. d
D. b
E. e
Answer: A,E