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Home Cisco® 400-201

Cisco® 400-201 Exam Practice Questions (P. 4)

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Question #31

Refer to the exhibit. The 2.6.6.6/32 prefix is flapping when P1 is flapping. Which action can fix this issue?
  1. A
    On PE2, allow only redistribution from BGP into IS-IS, on PE3, allow only redistribution from IS-IS into BGP.
  2. B
    On PE2 and PE3, reconfigure redistribute BGP into IS-IS using the metric-type external parameter.
  3. C
    Configure a sham link between PE2 and PE3.
  4. D
    Configure all IS-IS instances as level-1-only.

Correct Answer:
B

Question #32

Refer to the exhibit. An MPLS Layer 3 VPN service has been provisioning for a customer. Which will be the ToS value at Site B for the exceeded traffic that is sent form Site A with ToS 2?
  1. A
    0
  2. B
    2
  3. C
    3
  4. D
    4
  5. E
    No exceeded traffic will reach Site B.

Correct Answer:
C

Question #33

Refer to the exhibit. Customer ABC is peering with two service providers for Internet access. In order to prevent the AS 100 from becoming a transit AS between
ISP_1 and ISP_2, which BGP configuration must be applied to achieve this goal?
  1. A
    CE1#CE2#ip as-path access-list 1 permit ^11$ip as-path access-list 1 permit ^$route-map LOCAL_ONLY permit 10route-map LOCAL_ONLY permit 10match as-path 1match as-path1router BGP 100router BGP 100neighbor 1.1.2.2 route-map LOCAL_ONLY outneighbor 1.1.1.2 route-map LOCAL_ONLY out
  2. B
    CE1#CE2#ip as-path access-list 1 permit ^$ip as-path access-list 1 permit ^$route-map LOCAL_ONLY permit 10route-map LOCAL_ONLY permit 10match as- path 1match as-path 1router BGP 100router BGP 100neighbor 1.1.2.2 route-map LOCAL_ONLY outneighbor 1.1.1.2 route-map LOCAL_ONLY out
  3. C
    CE1#CE2#ip as-path access-list1 permit ^100$ip as-path access-list 1 permit ^100$route-map LOCAL_ONLY permit 10route-map LOCAL_ONLY permit 10match as-path 1match as-path 1router BGP 100router BGP 100neighbor 1.1.2.2 route-map LOCAL_ONLY inneighbor1.1.1.2 route-map LOCAL_ONLY in
  4. D
    CE1#CE2#ip as-path access-list 1 permit ^$ip as-path access-list 1 permit ^$route-map LOCAL_ONLY permit 10route-map LOCAL_ONLY permit 10match as- path 1match as-path 1router BGP 100router BGP 100neighbor 1.1.2.2 route-map LOCAL_ONLY inneighbor 1.1.1.2 route-map LOCAL_ONLY in
  5. E
    CE1#CE2#ip as-path access-list 1 permit ^100$ip as-path access-list 1 permit ^100$route-map LOCAL_ONLY permit 10route-mapLOCAL_ONLY permit 10match as-path 1match as-path 1router BGP 100router BGP 100neighbor 1.1.2.2 route-map LOCAL_ONLY outneighbor 1.1.1.2 route-map LOCAL_ONLY out

Correct Answer:
B

Question #34

Refer to exhibit. Which conclusion is true?
  1. A
    CT0 TE LSP can preempt CT1 TE. CT1 TE LSP cannot preempt CT0, except CT1 TE LSPs that corresponds to TE Class 0.
  2. B
    CT0 TE LSP can preempt a CT1 TE LSP, but not vise versa. A CT1 TE LSP with a better priority can still preempt a CT1 TE LSP with worse priority.
  3. C
    CT1 TE LSP can preempt some CT0 TE LSPs and vice versa however other TE LSPs cannot preempt CT1 TE LSPs that corresponds to TE Class 0.
  4. D
    CT1 TE LSP can preempt a CT0 TE LSP, but not vice versa. A CT0 TE LSP with a better priority can still preempt a CT0 TE LSP with worse priority.

Correct Answer:
C
References:

Question #35

Refer to exhibit. A network engineer has a requirement to enable MPLS TE tunnels on the network to be used by L3VPN customers. Which MPLS TE feature allow the network engineer to configure MPLS TE LSPs by using a few CLI commands?
  1. A
    AutoTunnel Mesh Groups on all PE routers
  2. B
    AutoTunnel Mesh Groups on all P and PE routers
  3. C
    AutoTunnel Primary and Backup on all P and PE routers
  4. D
    AutoTunnel Primary and Backup on all P routers

Correct Answer:
A

Question #36
An MPLS network infrastructure of the service provider ABC is growing very quickly due to many recent acquisitions. Concerns arise about labeling each and every IP address on the service provider core network. The IP address pace is designed as per following:
✑ Service provide ip address range is: 10.0.0.0/16
✑ All loopbacks addresses use subnet mask /32
✑ 10.0.0.0/24 range is used for loopback addresses
✑ All other subnet masks used for links are /24 and /25
Which configuration does significantly reduce the label allocations without compromising LDP functionalities?
  1. A
    ip prefix-list List1 deny 10.0.0.0/16le 20 ge 25!mpls ldp label allocate global prefix-list List1
  2. B
    access-list 1 permit 10.0.0.0.0.0.255.255mpls ldp neighbor 10.0.0.1 labels accept 3
  3. C
    mpls ldp password required for 10!access-list 10 permit 10.0.0.1access-list 10 permit 10.0.0.2access-list 10 permit 10.0.0.3
  4. D
    mpls ldp label allocate global host-routes

Correct Answer:
D

Question #37
LDP uses which two components to discover neighbors on a network segment? (Choose two.)
  1. A
    224.0.0.1multicast address
  2. B
    646 udp port
  3. C
    646 tcp port
  4. D
    224.0.0.14 multicast address
  5. E
    711 tcp port
  6. F
    711 udp port
  7. G
    224.0.0.2 multicast address

Correct Answer:
BG
References:

Question #38

Refer to the exhibit. R1 and R5 routers are not directly connected. Loopback 0 is configured as LDP router id for both R1 and R5 routers. Loopback 0 IPv4 addresses are reachable between R1 and R5 routers. The LDP session between R1 and R5 is not established. There is no access-list applied in any routers in the path between R1 and R5. Which is the reason the LDP session is not working?
  1. A
    LDP authentication are missing in both R1 and R5 routers.
  2. B
    Targeted LDP works only for directly connected LDP neighbors.
  3. C
    R5 is not configured to accept targeted LDP sessions.
  4. D
    It is necessary to create a GRE tunnel between R1 and R5 in order to targeted LDP session to work for a non directly connected LDP neighbors.

Correct Answer:
C

Question #39
Which feature allows an MPLS TE tunnel to be used by an IGP at the headend of the tunnel?
  1. A
    generalized MPLS
  2. B
    MPLS TE link management
  3. C
    Differentiated Services Traffic Engineering
  4. D
    MPLS TE autoroute announce
  5. E
    MPLS TE Forwarding Adjacency

Correct Answer:
D
References:

Question #40
Refer to the exhibit. Which technology is being implemented?

  1. A
    DS-TE
  2. B
    PBTS
  3. C
    IP FRR
  4. D
    CBTS

Correct Answer:
D

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