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2021 Sep 400-201 cisco service provider:
Q61. Refer to the exhibit.
OSPF is already running with the default OSPF parameters. R1 has added a new subnet (loopback 11). What will occur in regards to SPT computing on R2 router?
A. Adding ispf command on R2 router, the entire SPT will be computed on R2 router.
B. Because 10.11.11.11/32 prefix information will be in a LSA type 3 on R2 router's OSPF database, R2 router will run partial SPF computation.
C. Adding ispf command on R2 router, R2 router will recompute only the affected part of tree.
D. Because 10.11.11.11/32 prefix will be a LSA type 1 on R2 router's OSPF database. R2 router will always run a full SPF computation, even though an OSPF optimization is applied on R2 router.
Answer: C
Q62. In a frame, the MPLS label is imposed where?
A. Before the layer 2 header
B. Within the Layer 3 header
C. After the Layer3 header and before Layer2 header
D. After the Layer2 header and before Layer3 header
Answer: D
Q63. Refer to the exhibit.
All routers have OSPF adjacency with the directly connected routers, yet RC cannot receive OSPF updates from Area 0 To fix this issue, which configuration should be applied?
A. On RD router
router ospf 1
area 1 virtual-link 3.3.3.3
On RB router:
router ospf 1
area 1 virtual-link 4.4.4.4
B. On RC router.
router ospf 1
area 2 virtual-link 3.3.3.3
On RB router:
router ospf 1
area 2 virtual-link 2.2.2.2
C. On RC router
router ospf 1
area 0 virtual-link 1.1.1.1
On RA router:
router ospf 1
area 2 virtual-link 2.2.2.2
D. On RD router:
router ospf 1.
area 1 virtual-link 1.1.1.1
On RA router:
router ospf 1 areal virtual-link 4.4.4.4
Answer: A
Q64. Refer to the exhibit.
Which MPLS TE component keeps track of the flooding and admission control?
A. MPLS TE priorities
B. RSVP
C. link attributes
D. link manager
Answer: B
Q65. 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
Refresh thendral 201-400:
Q66. DRAG DROP
Drag and drop the IPFIX terminology on the left to the correct description on the right. Not all options will be used.
Answer:
Q67. 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
Q68. 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
Q69. Refer to the exhibit.
IS-IS configuration has been deployed using the default IS-IS metric value and default IS-IS metric-style. The SP decides to implement MPLS TE in all routers, except R5. In order to maintain IS-IS adjacency between R3 and R5 without impacting reachability, which command should be configured on R3 router under the IS-IS process?
A. metric-style narrow
B. metric-style wide
C. metric-style narrow transition
D. metric-style transition
Answer: D
Q70. A Service Provider wants to extend MPLS WAN endpoints in the cloud at the edge of a customer network within the cloud. Which platform will meet this requirement?
A. Cisco NX-OS
B. Cisco CSR1000v
C. Cisco ISR Routers running IOS
D. Cisco CRS-1
E. Cisco ASR Routers running IOS-XR
Answer: B
Explanation: http://www.cisco.com/c/en/us/products/collateral/routers/cloud-services-router-1000v-series/datasheet-c78-733443.html