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Q31. The following congestion avoidance configuration has been applied on an outgoing interface:
Which is the result of the egress packets marked as DSCP AF32 when the average queue depth is 40?
A. It will be dropped with a random rate less than the one defined by MPD.
B. It will be tail dropped.
C. It will be dropped with a rate of 1 packet out of 30.
D. It will be dropped with a rate of 1 packet out of 20.
Answer: D
Q32. 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 handling the secondary link, advertise routes with a MED value of 0.
B. On the router handling the primary link, set the 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
Q33. Refer to the exhibit. Two MPLS TE tunnels are configured with a total bandwidth guarantee of 100 Mbps. However, Tunnel 1 has a requirement to have one-fifth of this total bandwidth. Which two configurations accomplish this goal? (Choose two.)
A. Configure tunnel mpls traffic-eng bandwidth 20000 under the Tunnel 1 interface.
B. Configure bandwidth 20000 under the Tunnel 1 interface.
C. Configure tunnel mpls traffic-eng bandwidth 80000 under the Tunnel 2 interface.
D. Configure bandwidth 80 Mbps under physical interfaces in the path PE1-P2-PE2.
E. Configure bandwidth 20 Mbps under physical interfaces in the path PE1-P1-PE2
F. Configure bandwidth 80000 under the Tunnel 2 interface.
Answer: A,C
Explanation: See Configuration Guide
Q34. An R1 router requires an equal load balancing to reach the prefix 192.168.0.0/16 over two exit points: through R2 and R3 routers. Which two options must be configured on the R1 router to achieve this goal? (Choose two.)
A. The BGP maximum path feature must be configured on R1.
B. The BGP PIC core must be enabled on R1
C. Weight, local-pref, MED, as-path length, origin, and the BGP next-hop IGP cost must be the same for the R2 and R3 IBGP updates to R1.
D. The BGP Link Bandwidth feature must be applied on R1.
E. BGP extended community exchange must be enabled between IBGP neighbors.
Answer: D,E
Explanation:
http://www.cisco.com/c/en/us/td/docs/ios/12_2s/feature/guide/fsbgplb.html#wp1058373
Q35. Which BGP feature improves the convergence and response time to adjacency changes with BGP neighbors?
A. reducing BGP scanner timing to the minimum that is supported
B. BGP Multihop
C. Next-Hop Address Tracking
D. Fast Peering Session Deactivation
E. TTL Security Check
Answer: C
Explanation: http://www.cisco.com/c/en/us/td/docs/ios/12_2sb/feature/guide/sbbnhop.html
Q36. Refer to the exhibit.
Why does R1 not receive a label for 10.0.0.3/32 prefix?
A. R1 does not have an established LDP neighborship with the router announcing the 10.0.0.3/32 prefix.
B. The 10.0.0.3/32 prefix is being null-routed in the downstream neighbor
C. LDP peer is not configured to advertise a label for the 10.0.0.3/32 prefix
D. BGP is not configured to exchange labels with the BGP peer advertising 10.0.0 3/32 prefix
Answer: D
Q37. Which is the main goal of BGPsec regards to improve BGP security?
A. Reduces risk of improper route propagation from unauthorized AS numbers
B. Configures BGP route verification by storing routes in a database used to validate AS numbers
C. Adds encryption to route propagation outside the iBGP AS
D. Increases legitimacy and authenticity of BGP advertisements
Answer: D
Explanation: Reference: https://tools.ietf.org/html/draft-lepinski-bgpsec-overview-00
Q38. In an MPLS VPN environment, the QoS marking over the MPLS backbone must be different from the one that is received from the customer. The forwarding on the egress PE is based on the marking that is set by the ingress PE. Which null label and QoS mode can achieve this?
A. MPLS explicit null with pipe mode
B. MPLS implicit null with short pipe mode
C. MPLS implicit null with uniform mode
D. MPLS explicit null with uniform mode
E. MPLS explicit null with short pipe mode
F. MPLS implicit null with pipe mode
Answer: A
Explanation:
http://www.cisco.com/en/US/tech/tk828/technologies_q_and_a_item09186a00800a43f5.sht ml#wp27379
http://www.cisco.com/c/en/us/td/docs/ios-xml/ios/mp_te_diffserv/configuration/15-mt/mp-te-diffserv-15-mt-book/mp-diffserv-tun-mode.pdf
https://ccdewiki.wordpress.com/2013/05/31/three-qos-models-in-mpls/
Q39. An operations engineer wants to manually optimize the MPLS Traffic Engineering tunnels. Which Cisco IOS EXEC command should the engineer apply?
A. tunnel mpls traffic-eng autoroute destination
B. tunnel mpls traffic-eng path-option lowest _number dynamic
C. mpls traffic-eng reoptimize lockdown
D. mpls traffic-eng multicast-intact
E. mpls traffic-eng reoptimize
Answer: E
Q40. An 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