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Which virtualization technology allows for HSRP protocol to be used in the active/active configuration where both HSRP Layer 3 devices can forward network traffic?

A.    OTV
B.    VSS
C.    vPC
D.    VDC

Answer: C

Which technology extends Layer 2 LANs over any network that supports IP?

A.    OTV
B.    VSS
C.    vPC
D.    VLAN

Answer: A

What is the purpose of an OTV edge device?

A.    connect to other data centers
B.    connect to the access layer
C.    connect to the end users
D.    connect to mobile devices

Answer: A
“Edge Device
The edge device (Figure 1-1) performs OTV functions: it receives the Layer 2 traffic for all VLANs that need to be extended to remote locations and dynamically encapsulates the Ethernet frames into IP packets that are then sent across the transport infrastructure.
Finally, the OTV edge device can be positioned in different parts of the data center. “

Which QoS architecture provides scalability of implementation?

A.    IntServ
B.    DiffServ
C.    LLQ
D.    RSVP

Answer: B

Which architecture provides a way to deliver end-to-end QoS as required by real-time voice and video business applications?

A.    IntServ
B.    DiffServ
C.    LLQ
D.    ToS
E.    DSCP

Answer: A
DiffServ is known as “Hop-by-Hop” and not “End-to-End”

CoS is applied for Layer 2 markings in an Ethernet environment. Which protocol must be configured on the Layer 2 switch port for CoS to work?

A.    MPLS
B.    IEEE 802.1W
C.    IEEE 802.1Q
D.    IEEE 802.1S

Answer: C

Which protocol is used in an in-band network and why?

A.    UDP, because it is connectionless
B.    SSH, because the username and password are encrypted
C.    Telnet, because the username and password are sent in clear
D.    MSDP, because it uses TCP as its transport protocol

Answer: B

What is an advantage of having an out-of-band management?

A.    It is less expensive to have an out-of-band management.
B.    Network devices can still be managed, even in case of network outage.
C.    There is no separation between the production network and the management network.
D.    SSH protocol must be used to manage network devices.

Answer: B

The direction of the flow of multicast traffic is based on which protocol?

A.    PIM
B.    IGMP
C.    underlying IGP
D.    MSDP

Answer: C
“Reverse Path Forwarding (RPF) PIM uses the unicast routing information to create a distribution tree along the reverse path from the receivers towards the source. The multicast routers then forward packets along the distribution tree from the source to the receivers. RPF is a key concept in multicast forwarding. It enables routers to correctly forward multicast traffic down the distribution tree. RPF makes use of the existing unicast routing table to determine the upstream and downstream neighbors. A router will forward a multicast packet only if it is received on the upstream interface. This RPF check helps to guarantee that the distribution tree will be loopfree.”

Which option can be implemented to manipulate the election of PIM DR to force multicast traffic to a certain path?

A.    Assign a lower PIM DR priority to the PIM DR interface.
B.    Assign a lower IP address to the PIM DR interface.
C.    Assign a higher PIM DR priority to the PIM DR interface.
D.    Increase the cost on the PIM DR interface.

Answer: C

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