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Q1. 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
Q2. 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
Q3. In which three ways do PE routers manage multiple customers in MPLS VRF environments? (Choose three.)
A. Route targets are configured that allow the PE to uniquely identify the customer routes in MP-BGP
B. PE routers use route distinguishers to tag routes for importing and exporting into customer VRFs.
C. PE routers use PE-CE routing protocols to manage routing with client VRF devices.
D. PE routers use route targets to tag routes for importing and exporting into customer VRFs.
E. Route distinguishes are configured that allow the PE to uniquely identify the customer routes in MP-BGP.
F. PE routers use PE-PE routing protocols to manage routing with client VRF devices.
Answer: C,D,E
Q4. Refer to the exhibit.
Which VLAN interface does untagged traffic pass through?
A. 1
B. 2
C. 3
D. 4
Answer: C
Q5. A Service Provider provides a Layer 2 connection that is based on IEEE 802.1ad. When the customer tries to access a switch at the other side of the link by using SSH, the connection fails. What is the cause of this failure?
A. The Service Provider omitted the command l2protocol-tunnel stp.
B. The Service Provider omitted the command l2protocol-tunnel vtp.
C. The Service Provider omitted the command vlan dot1q tag native.
D. The Service Provider omitted the command spanning-tree bpdufilter enable.
Answer: C
Explanation: https://ccieblog.co.uk/qinq/802-1q-tunnelling-qinq
Q6. A telecom company offers ISPs the ability to resell dynamic IP broadband services over its local loops, but it does not allow the resellers to install broadband network gateways. If an ISP wants to become a reseller but is unable to use NHRP, which tunneling protocol should be implemented?
A. IP in IP
B. IPsec
C. L2TP
D. GRE
Answer: C
Explanation:
However, while OpenVPN can not be used with VoIP, L2TP can be used for VoIP. Only use this if OpenVPN is not available and you are in need of very high security/encryption.
Q7. A network administrator wants to implement an IP dampening feature for a network. Which parameter identifies how fast the accumulated penalty can decay exponentially?
A. reuse threshold
B. suppress threshold
C. half-life period
D. maximum suppress time
Answer: C
Explanation: Reference:
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_pi/configuration/15-sy/iri-15-sy-book/iri-ip-event-damp.html
Q8. 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 the auto tunnel primary feature.
D. Enable Cisco MPLS TE Fast Reroute.
E. Enable the auto tunnel backup feature.
Answer: B
Explanation:
http://www.cisco.com/en/US/docs/ios/12_0st/12_0st10/feature/guide/fastrout.html
Q9. When troubleshooting a DoS attack, a support engineer finds a huge number of packets that are destined to one of the core routers interface IP address. By the time the packets reach this core router, they have a TTL of 0. Based on Cisco platform running IOS 15.3S, which technique is most effective in resolving this problem
A. Configure LPTS.
B. Configure an ACL on the core router interface.
C. Configure CoPP on the core router.
D. Configure policing on PE routers.
E. Configure a receive ACL on the core router.
Answer: C
Q10. Refer to the exhibit.
MPLS VPN service has been provisioned for a customer by using inter-AS MPLS Option C. It is possible to redistribute ISP1 and ISP2 received loopback addresses into the local IGP. How many labels are associated with packet forwarding between the ASBRs?
A. 0
B. 1
C. 2
D. 3
E. 4
Answer: C