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QUESTION NO: 21
Which are the two purposes of the MPLS label value 1? (Choose two.)
A. it is used for MPLS OAM packets.
B. it indicates an implicit null label.
C. it is used for VPNv6 packets.
D. it is used to carry the QoS value in the label stack.
E. it indicates an explicit null label.
F. itindicates a router alert label.
Answer: C,F
Explanation: http://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switchingmpls/
mpls/4649-mpls-faq-4649.html#qa3
http://www.iana.org/assignments/mpls-label-values/mpls-label-values.xhtml
IPv4 Explicit NULL Label —-> 0
Router Alert Label —-> 1
IPv6 Explicit NULL Label —–> 2
Implicit NULL Label —–> 3
OAM Alert Labe —–> 14QUESTION NO: 22
Refer to the exhibit. Why is R3 unable to install 1.1.1.1/32 in its routing table?
A. 11.11.11.11/32 exists in the routing table, so the conditional advertising is not working.
A. 11.11.11.11/32 exists in the routing table, so the conditional advertising is not working.
B. The route is filtered out by theip prefix-list ROUTE-INcommand.
C. 11.11.11.11/32 is advertising in the BGP table, so conditional advertising is not working.
D. Thebgp redistribute-internalcommand is missing under the R2 BGP process.
Answer: B
Explanation:
QUESTION NO: 23
An engineer wants to configure Fast Reroute in the network. Which methodology eliminates RSVP
configuration in the network?
A. Enable LDP Fast Synch.
B. Enable IP Fast Reroute.
C. Enable theauto tunnelprimary feature.
D. Enable Cisco MPLS TE Fast Reroute.
E. Enable theauto tunnelbackup feature.Answer: B
Explanation:http://www.cisco.com/en/US/docs/ios/12_0st/12_0st10/feature/guide/fastrout.html
QUESTION NO: 24
What are three actions that the control word performs in MPLS AToM? (Choose three.)
A. is used to identify the VC label
B. is used for padding small packets
C. preserves the sequence of the transported frames
D. facilitates the load balancing of AToM packets in the MPLS backbone network
E. carries control bits of the Layer 3 header of the transported protocol
F. is used to identify the tunnel label
Answer: B,C,D
Explanation: https://ccdewiki.wordpress.com/2013/05/28/control-word-on-atom/
QUESTION NO: 25
What are two advantages of Cisco IOS XR Software over Cisco IOS Software? (Choose two.)
A. a configuration that is grouped by interface
B. a configuration that is grouped by process
C. one-stage configuration
D. a monolithic OS
E. a two-stage configuration
Answer: B,E
Explanation:
QUESTION NO: 26
Which are two major changes SyncE offers over traditional Ethernet to make it suitable for clock
distribution? (Choose two.)
A. SyncE introduces the concept of “Boundary Clocks” and “Transparent Clocks”
improvingnetwork scalability and accuracy of clock synchronization.
B. Industry standard that guarantee interoperability, since granular details, such as specific field
values are specified.
C. A mandated clock accuracy of 4.6ppm.
D. The ESMC protocol forclock selection, distribution, management, traceability, and failover.
E. High-priority synchronization packets so it can continually adjust its own oscillator.Answer: C,D
Explanation: http://www.cisco.com/c/en/us/support/docs/optical/synchronous-optical-networksonet/
23718-timefaq-23718.html
http://cp.literature.agilent.com/litweb/pdf/5990-4386EN.pdf
QUESTION NO: 27
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-ASmVPN models that use mLDP
C. for the partitioned mVPNmodel 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
QUESTION NO: 28
Based on the following configuration:
vrf definition ABC
rd 10.0.0.1:1000
!
address-family ipv4
route-target export 1:1
route-target import 1:1
mdt default 232.0.0.1
Which two statements about multicast VPN configuration are true? (Choose two.)
A. The multicast tree is created based only on the existence of active sources or receivers behind
PEs in the ABC VRF.
B. The service provider core network is required to support SSM.C. Multicast needs to be enabledonly on ABC VRF and is tunneled to participating PE routers in
the ABC VRF.
D. The SP core network is required in order to enable the BGP Multicast Address Family on
allpeering.
E. Multicast is required for the core network in addition to the ABC VRF.
F. The multicast tree exists regardless of whether there are any active sources or receivers in the
ABC VRF.
Answer: E,F
Explanation: http://www.ciscopress.com/articles/article.asp?p=32100&seqNum=4
http://www.cisco.com/en/US/tech/tk828/technologies_white_paper09186a00800a3db6.shtml
QUESTION NO: 29
An engineer is implementing an MPLS within the core of the Service Provider network. What two
components are required to build the control and data plane for MPLS Label Switched Paths?
(Choose two.)
A. FIB
B. CEF
C. LDP
D. LFIB
E. OSPF
Answer: B,C
Explanation:
QUESTION NO: 30
Refer to the exhibit. Customer XYZ Site 1 is not learning prefixes from Site 2. What is the issue?
A. MPLS LSP is broken along the path.
A. MPLS LSP is broken along the path.
B. Theroute-policyis not implemented in router PE-2.
C. The BGPlocal-ascommand should be used between PE-1 and CE-1.
D. The route-distinguisher values must match in both sites.
E. The BGPas-overridecommand should beimplemented between PE-1 and CE-1.
Answer: E
Explanation:
QUESTION NO: 31
Refer to the exhibit. A network engineer must configure BFD for IS-IS between R1 and R2. In case
the primary link fails, the convergence time should be less than a second.
Which two IOS commands are required to meet this requirement? (Choose two.)
A. isisbfd
A. isisbfd
B. bfd minimum-interval 250
C. bfd interval 250 min_rx 250 multiplier 3
D. bfd multiplier 3
E. bfd interval 250 min_rx 250 multiplier 4
F. bfd fast-detect ipv4
Answer: C,F
Explanation: http://www.cisco.com/c/en/us/td/docs/routers/xr12000/software/xr12k_r4-
3/routing/command/reference/b_routing_cr43xxr12k/b_routing_cr43xxr12k_chapter_010.html#wp3
058619742
QUESTION NO: 32An engineer must implement E-Line services for a service provider network. Which two services
apply in this situation? (Choose two.)
A. EVPL
B. E-Tree
C. E-LAN
D. EVC
E. EPL
Answer: A,E
Explanation: http://www.cisco.com/c/en/us/td/docs/net_mgmt/prime/fulfillment/6-
2/theory/operations/guide/theory/l2ce.pdf
QUESTION NO: 33
Refer to the exhibit. After the BGP TCP negotiation between RouterA and RouterB, what will be
the value of the keep alive timer and the hold-down timer, respectively?
A. 3 seconds and 9 seconds
A. 3 seconds and 9 seconds
B. 60 seconds and 180 seconds
C. 10 seconds and 9 seconds
D. no value, because BGP negotiation will not be successful
E. 10 seconds and 10 seconds
F. 10 seconds and 30 seconds
G. 3 seconds and 30 seconds
H. 3 seconds and 10 seconds
Answer: A
Explanation:QUESTION NO: 34
In a routing virtualization concept, which are the two main techniques for creating virtualized router
entities as defined by their physical and operational characteristics? (Choose two.)
A. VDC
B. SVR
C. DRP
D. HVR
E. SDR
Answer: B,D
Explanation:
http://www.cisco.com/en/US/solutions/collateral/ns341/ns524/ns562/ns573/white_paper_c11-
512753_ns573_Networking_Solutions_White_Paper.html
QUESTION NO: 35
Which two statements about Unified MPLS are true? (Choose two.)
A. Unified MPLS works on Cisco IOS XR Software only.
B. Unified MPLS extends MPLS across multidomain networks in a scalable manner.
C. New technologies or protocols are not used; only MPLS, LDP, IGP, and BGP are used.
D. ABR loopback prefixes should always be redistributed from the core IGP into the aggregation
IGP.
E. The RRs are part of the control path only.
Answer: B,D
Explanation: http://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switchingmpls/
mpls/116127-configure-technology-00.pdf
QUESTION NO: 36
Customers connecting to a Service Provider for Internet access are intending to implement
redundant peering. The design requirements call for preferring a primary link for both ingress and
egress traffic. Secondary links should be used only during primary outages. What two BGP
deployment options will accomplish this design goal? (Choose two.)
A. On the router handlingthe secondary link, advertise routes with a MED value of 0.B. On the router handling the primary link, setthe weight for all incoming routes to be a value of 0.
C. On the router handling the secondary link, advertise all routes with a longer AS-PATH value.
D. On the router handling the primary link, advertise all routes with a longer AS-PATH value.
E. On the router handling the secondary link, set the local preference for all incoming routes to be
a value of 0.
Answer: C,E
Explanation:
QUESTION NO: 37
Refer to the exhibit. A customer is running IS-IS within a network and is using BGP as a CE-PE
routing protocol. Which action allows CE1 to get the subnet 10.10.2.0/24 over the CE1-PE1 link,
regardless of whether there is a flap in the MPLS link or backdoor link?
A. Configure theneighbor <PE1-IP>weight 33768command on CE1 under the BGP process.
A. Configure theneighbor <PE1-IP>weight 33768command on CE1 under the BGP process.
B. Configure thedistance bgp 115 200 200command on CE1 under the BGP process.
C. Configure thedistance 30ipcommand on CE1 under the IS-IS process.
D. Configure thedistance bgp 115 200 200command on CE2 under the BGP process.
E. Configure theneighbor <PE1-IP>weight 33768command on CE2 under the BGP process.
Answer: B
QUESTION NO: 38Which are the two fundamental ways in which IEEE 1588 differs from SyncE? (Choose two.)
A. In addition to frequency synchronization, it achieves ToD synchronization to achieve phase
alignment which is required for multi-channel communication.
B. It is a purely-based solution, with the actual clock values being passed inside the payloads of
special packets dedicated to that task.
C. It offers two major changes over traditional Ethernet to make it suitable for clock distribution: a
mandated clock accuracy and the ESMC protocol for clock selection, distribution, management,
traceability, and failover.
D. SyncE is a Cisco proprietary ToDtechnologywhere IEEE 1588 is a industry standard
recommended for interoperability across vendor devices.
E. IEEE 1588 applies to voice-only systems or with low-bandwidth data traffic.
Answer: A,B
Explanation: http://www.eetimes.com/document.asp?doc_id=1278660
QUESTION NO: 39
Refer to the exhibit. Both MPLS TE tunnel 14 and MPLS TE tunnel 124 pass over the same
physical links. Which configuration on R1 enables TE 14 to be the primary tunnel and TE 124 to
become active when TE 14 is admin disabled?
A. Interface Tunnel14
A. Interface Tunnel14
tunnelmpls traffic-eng priority 3 1
!
Interface Tunnel124
tunnelmpls traffic-eng priority 5 4
B. Interface Tunnel14
tunnelmpls traffic-eng priority 4 1
!
`Interface Tunnel124tunnelmpls traffic-eng priority 3 2
C. Interface Tunnel14
tunnelmpls traffic-eng priority 7 7
!
Interface Tunnel124
tunnelmpls traffic-eng priority 1 1
D. Interface Tunnel14
tunnelmpls traffic-eng priority 3 2
!
Interface Tunnel124
tunnelmpls traffic-eng priority 4 1
Answer: B
Explanation:
QUESTION NO: 40
A network engineer wants to decrease the convergence time of a network that is running
integrated IS-IS as an IGP, at the expense of bandwidth and CPU usage. Which two configuration
tasks achieve this goal? (Choose two.)
A. Configure thehold timeto be 1 second.
B. Configure thehello intervalto be minimal.
C. Ensure thathello-paddingis disabled.
D. Ensure that thehello multiplieris set to 3.
E. Configure thehello multiplierto be 3.
Answer: B,D
Explanation:
https://books.google.co.in/books?id=u_XOQy4cBkgC&pg=PA184&lpg=PA184&dq=what+is+hello+
multiplier+minimal+time+in+integrated+is-is&source=bl&ots=XqDfyO3AVT&sig=NHY0L-knhHrg7h6i3RWorttgcE&
hl=en&sa=X&ved=0CDAQ6AEwA2oVChMIhfCI5ZXTxwIVQwaOCh3PfQe
a#v=onepage&q=what%20is%20hello%20multiplier%20minimal%20time%20in%20integrated%20
is-is&f=false
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