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NEW QUESTION 709
In which way does the Bridge Assurance mechanism modify the default spanning-tree behavior in an effort to prevent bridging loops?

A.    If BPDUs are no longer received on a port, the switch immediately sends out a TCN BPDU.
B.    Extended topology information is encoded into all BPDUs.
C.    BPDUs are sent bidirectional on all active network ports, including blocked and alternate ports.
D.    Received BPDUs are looped back towards the sender to ensure that the link is bidirectional.

Answer: C

NEW QUESTION 710
Which information is contained in an OSPF Type 7 Not-So-Stubby Area NSSA External LSA?

A.    External network address, mask, and cost to reach network that is external to the OSPF domain and only within the NSSA.
B.    The external network address, mask and cost to reach networks that are external to the OSPF NSSA, including the default route.
C.    The address of routers that connect the current area to other areas and cost to reach those routers.
D.    The paths and costs to reach other stub area border routers in the OSPF routing domain.
E.    The paths and costs to all OSPF NSSA areas that are external to the current area.

Answer: A

NEW QUESTION 711
Refer to the exhibit. The Main1 and Branch1 switches are connected directly over an MPLS pseudowire, and both run UDLD. After router B1 reloads because of a power failure, the pseudowire is restored. However, the Branch 1 switch is unable to reach the Main 1 switch. Which two actions can you take to restore connectivity and prevent the problem from recurring? (Choose two.)

A.    Issue the shutdown and no shutdown commands on both the Branch1 switch uplink to the B1 router and the Main1 switch's uplink to the M1 router.
B.    Configure a backup GRE tunnel between the Main1 and Branch1 switches.
C.    Enable UDLD recovery on both the Main1 and Branch1 switches.
D.    Enable errdisable recovery on both the Main1 and Branch1 switches.
E.    Configure a backup pseudowire between the Main1 and Branch1 switches.

Answer: AD

NEW QUESTION 712
Which statement about Auto-RP is true?

A.    An RP that is tied to a loopback address must be configured.
B.    All interfaces must be configured in sparse mode.
C.    All interfaces must be configured in sparse-dense mode.
D.    All interfaces must be configured in dense mode.

Answer: C

NEW QUESTION 713
Which technology can be used to secure the edge of an STP domain?

A.    root guard
B.    BPDU guard
C.    UplinkFast
D.    BPDU filter

Answer: A

NEW QUESTION 714
Which three features support object tracking? (Choose three.)

A.    OSPF
B.    BFD
C.    EEM
D.    HSRP
E.    PfR
F.    vPC

Answer: CDF

NEW QUESTION 715
Which GDOI key is responsible for encrypting control plane traffic?

A.    The traffic encryption key
B.    The key-chain
C.    The preshared key
D.    The key encryption key

Answer: D

NEW QUESTION 716
Which two statements about private VLAN communications are true? (Choose two.)

A.    Promiscuous ports communicate with all other ports.
B.    Primary VLAN traffic is passed across trunk interfaces.
C.    Promiscuous ports connect only to routers.
D.    Isolated ports communicate with other isolated ports.

Answer: AB

NEW QUESTION 717
Which three options are three of the valid message types for DHCPv6? (Choose three.)

A.    Offer
B.    Request
C.    Leave
D.    Solicit
E.    Discover
F.    Advertise

Answer: BDF

NEW QUESTION 718
Which IPv6 migration method allows IPv4-only devices to communicate with IPv6-only devices?

A.    GRE tunnel
B.    dual stack
C.    ISATAP tunnel
D.    NAT64

Answer: D

NEW QUESTION 719
Refer to the exhibit. While troubleshooting an issue with a blocked switch port, you find this error in the switch log. Which action should you take first to locate the problem?

A.    Check the attached switch for a BPDU filter.
B.    Test the link for unidirectional failures.
C.    Check the attached switch for an interface configuration issue.
D.    Execute the show interface command to check FastEthernet 0/1.

Answer: A

NEW QUESTION 720
Which three pieces of information are carried in OSPF type-3 LSAs? (Choose three.)

A.    Forwarding address
B.    IP subnet
C.    Subnet mask
D.    Authentication type
E.    External route tag
F.    Metric

Answer: ACF

NEW QUESTION 721
What is one requirement to support the IGMP proxy feature?

A.    Devices on the unidirectional link must be in the same IP subnet.
B.    Devices connected to a unidirectional link must disable Internet access.
C.    IGMP snooping must be disabled.
D.    PIM-DM must be enabled on all unidirectional links.

Answer: A

NEW QUESTION 722
Which routing protocol is incompatible with VRF-lite?

A.    IS-IS
B.    EIGRP
C.    BGP
D.    OSPF

Answer: B

NEW QUESTION 723
……

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>> New CCIE Service Provider 400-201 dumps PDF: https://drive.google.com/open?id=0B-ob6L_QjGLpVkYtTGdtRWFodXM

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