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Q71. The product team at an ISP that offers VoIP services wants to add two-way video conferencing to their product offering. Which three QoS methods can be applied for real-time traffic on WAN links with speeds that are slower than 768 Kbps? (Choose three.)
A. Apply MLP link fragmentation and interleaving to the interface.
B. Apply LLQ with both voice traffic and video traffic in the same priority queue.
C. Apply CBWFQ with VoIP traffic in its own class, which is marked with a PHB value of EF.
D. Apply CBWFQ with video traffic in its own class, which is marked with a PHB value of AF41.
E. Apply voice-adaptive fragmentation to ensure that large video packets are fragmented and interleaved.
F. Apply LLQ with video traffic that is dedicated in the priority queue.
Answer: A,C,D
Explanation:
http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/WAN_and_MAN/QoS_SRND/Qo S-SRND-Book/WANQoS.html
Q72. Refer to the exhibit.
The prefix 10.1.1.64/28 should be advertised to the PE router, yet the prefix is not being received by the PE. Which configuration should be applied on CE in order to fix this issue?
A. jp prefix-list ROUTES_TO_SP seq 1 permit 10.1.1.64/28
B. router bgp 65000 no network 10.1.1.64 mask 255.255.255.240 network 10.1.1.128 mask 255.255.255.128
C. ip prefix-list ROUTES_TO_SP permit 10.1.1.64/28
D. router bgp 65000 no network 10.1.1.64 mask 255.255.255.240 network 10.1.1.0 mask 255.255.255.0
Answer: A
Q73. Which QoS method is available when GRE is used to provide MPLS VPN services over an IP-only core?
A. matching MPLS EXP on the physical interface
B. matching EXP on the tunnel interface
C. matching DSCP on the physical interface
D. matching DSCP on the tunnel interface
Answer: C
Q74. A network engineer wants to deploy a solution that allows for 200 DS1 s and 100 DS0s that are multiplexed to a single interface on a Cisco 7600 Series Router. Which interface type satisfies this requirement?
A. Channelized T3/E3 (DS0)
B. Channelized OC-12/STM-4
C. OC-12/STM-4
D. OC-48c/STM-16
Answer: B
Q75. A service provider is using multicast flows to provide streaming video content to its customers. Video streams are sometimes interrupted, and network instability is determined to be the cause. Which action should the service provider take to decrease the burden on the router resources in an unstable unicast routing environment?
A. Reduce the volume of query messages.
B. Tune the RPF backoff.
C. i Increase the PIM hello hold timers.
D. Filter unnecessary SA messages.
Answer: B
Q76. Based on the following configuration:
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 enabled only 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 all peering.
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.sht ml
Q77. Refer to the exhibit.
Which VLAN interface does untagged traffic pass through?
A. 1
B. 2
C. 3
D. 4
Answer: C
Q78. 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
Q79. A Service Provider is offering VoIP services and a service level agreement to customers. Which configuration provides validation to customers that the service level agreement has been honored?
A. ip sla 999 udp-jitter 209.165.200.225 1000 codec g729a tos 160 ip sla schedule 999 life forever start-time now
B. ip sla 999 icmp-jitter 209.165.200.225 tos 160 ip sla schedule 999 life forever start-time now
C. ip sla 999 icmp-jitter 209.165.200.225 tag VoIP-SLA ip sla schedule 999 life forever start-time now
D. ip sla 999 udp-jitter 209.165.200.225 1000 codec g729a tag VoIP-SLA
ip sla schedule 999 life forever start-time now
Answer: D
Q80. In order to prevent malicious traffic flows, how does BGPsec protect prefix advertisements?
A. It validates only the originating AS.
B. It validates routes with encryption.
C. It validates the AS path.
D. It validates the next-hop AS.
Answer: C