[May 2018] Lead2pass 100% Valid 400-201 Exam Questions PDF Free Download 647q

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QUESTION 31
Cisco IOS XR software is partitioned into three planes: control, data, and management. Which three of these belong to the data plane? (Choose three.)

A.    XML
B.    RIB
C.    FIB
D.    QoS
E.    PFI

Answer: CDE

QUESTION 32
A network engineer is responsible for implementing a solution with Cisco IOS XR Software that insures continuous forwarding during a control plane failure. Which two technologies should the engineer consider? (Choose two.)

A.    TE FRR
B.    IP FRR
C.    graceful restart
D.    BFD
E.    NSR

Answer: CE
Explanation:
http://www.cisco.com/c/en/us/td/docs/routers/crs/software/crs_r4-3/mpls/configuration/guide/b_mpls_cg43xcrs/b_mpls_cg43crs_chapter_01.html#task_1129

QUESTION 33
What are three main characteristics of mLDP that differ from RSVP-TE? (Choose three.)

A.    The LSPs are built from tailend to headend.
B.    The LSPs are built from headend to tailend.
C.    It supports only P2MP LSPs.
D.    It supports both P2MP and MP2MP LSPs.
E.    Signaling is periodic.
F.    No periodic signaling is performed.

Answer: ADF
Explanation:
http://www.cisco.com/c/dam/en/us/products/ios-nx-os-software/multicast-label-distribution-protocol-mldp/whitepaper_c11-598929_v1.pdf

QUESTION 34
Which are the two purposes of the MPLS label value 1? (Choose two.)

A.    it is used for MPLS OAM packets.
B.    it indicates an implicit null label.
C.    it is used for VPNv6 packets.
D.    it is used to carry the QoS value in the label stack.
E.    it indicates an explicit null label.
F.    it indicates a router alert label.

Answer: AF
Explanation:
A value of 1 represents the “Router Alert Label”. When a received packet contains this label value at the top of the label stack, it is delivered to a local software module for processing. The actual packet forwarding is determined by the label beneath it in the stack. However, if the packet is forwarded further, the Router Alert Label should be pushed back onto the label stack before forwarding. The use of this label is analogous to the use of the “Router Alert Option” in IP packets (for example, ping with record route option)
http://www.cisco.com/c/en/us/support/docs/multiprotocol-label-switching-mpls/mpls/4649-mpls-faq-4649.html

QUESTION 35
Refer the exhibit. Two Autonomous Systems are enabled to support multicast. An engineer wants to set up configuration so that a multicast client at AS 100 can receive multicast traffic from the M-Server at AS 200. However, the RP announcements must be limited within each autonomous system site. Which Cisco IOS configuration achieves this goal?

A.    On both ASBRs Eth0/0 and the no ip pim sparse-mode command.
B.    On both ASBRs add the ip pim send-rp-discovery scope 1 command.
C.    On both RPs add the ip pim send-rp-discovery scope 2 command.
D.    On both ASBRs Eth0/0 and the ip pim bsr-border command.
E.    On both ASBRs Eth0/0 and the ip pim dense-mode command.
F.    On both RPs add the ip pim bsr-border command.

Answer: D

QUESTION 36
What is the main advantage of H-VPLS over VPLS?

A.    H-VPLS provides redundancy.
B.    H-VPLS provides security.
C.    H-VPLS improves the scalability.
D.    H-VPLS allows a broader use of protocols.

Answer: C
Explanation:
http://www.cisco.com/en/US/products/ps6603/products_white_paper09186a00801ed506.shtml

QUESTION 37
In a Layer 2 VPN service, which is the default behavior of an EVC-based platform with regards to VLAN manipulation?

A.    keeps the VLAN tag of the incoming frame
B.    attaches two VLAN tags to the incoming frame
C.    removes the VLAN tag from the incoming frame
D.    removes all the VLAN tags from the incoming frame
E.    sets the VLAN tag of the incoming frame

Answer: A
Explanation:
http://www.cisco.com/c/en/us/support/docs/routers/asr-9000-series-aggregation-services-routers/116453-technote-ios-xr-l2vpn-00.html#anc7

QUESTION 38
Which of these is not a component of MPLS traffic engineering?

A.    trunk admission control
B.    forwarding traffic to tunnel
C.    information distribution
D.    path selection, calculation, and setup
E.    traffic patterns prediction

Answer: E

QUESTION 39
Which three statements about MPLS traffic engineering (MPLS TE) are true? (Choose three)

A.    MPLS TE supports admission control
B.    MPLS TE tunnel traffic is a link attribute to compute the TE tunnel path
C.    MPLS TE uses BGP extension to advertise link attributes
D.    MPLS TE provides protection capability
E.    MPLS TE uses RSVP to establish LSP

Answer: ADE

QUESTION 40
Which three statements about BGP confederation and route reflectors are true? (Choose three)

A.    Clusters are used in confederation schemes to avoid loops.
B.    BGP network can have a confederation within a route reflector area.
C.    An internal BGP network cannot have a route reflector within a confederation.
D.    An internal BGP network can have a route reflector within a confederation.
E.    Clusters are used in route reflector schemes to avoid loops.
F.    BGP network cannot have a confederation within a route reflector area.

Answer: DEF

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