In an NFV environment, what is the role of an SDN controller?

In an NFV environment, what is the role of an SDN controller?
A. Dynamically controls all of the software components
B. Spins up the VMs that are required to build the NFVs
C. Dynamically scales up and scales down VM resources
D. Connects the virtualized networking devices through a common policy-based model

Answer: D

Which protocol provides fast link failure detection for all type of encapsulation?

Which protocol provides fast link failure detection for all type of encapsulation?
A. Prefix Independent Convergence
B. Carrier delay
C. Non stop forwarding
D. Bidirectional forwarding detection

Answer: D

Which two solutions can prevent the multicast traffic from being affected by the RPF check failure due to the MPLS TE tunnel deployment?

Refer to the exhibit.

image052 - 
Which two solutions can prevent the multicast traffic from being affected by the RPF check failure due to the MPLS TE tunnel deployment?
IPTV video clients are connected to R6. Unicast and multicast traffic flows from R1 to R6. The OSPF cost of the R1-R2-R3-R6 path is lower than the R1-R5-R4-R3-R6 path
To enable load sharing and fast reroute, the design team decided to implement MPLS TE tunnels between R1 and R3 using the forwarding adjacency feature. After the MPLS TE tunnels are deployed, the multicast traffic stops working
While trouble shooting the issue, the operations engineer noticed that the OSPF route to the multicast source is learned via the MPLS TE tunnel, which causes the RPF check to fail.
Which two solutions can prevent the multicast traffic from being affected by the RPF check failure due to the MPLS TE tunnel deployment? (Choose two)
A. Replace forwarding adjacency by autoroute announce and enable the multicast-intact feature
B. Enable PIM on the MPLS TE tunnel on both headend routers
C. Enable the Multitopology routing feature
D. Enable a new routing protocol, such as another OSPF process, on the core-facing links
E. create a static mroute on R3 with the RPF pointing to the MPLS TE tunnel

Answer: A, C

What is the traffic flow behavior between branches after 2547oDMVPN implementation?

Refer to the exhibit.

image226 - 
What is the traffic flow behavior between branches after 2547oDMVPN implementation?
ACME Enterprise is running DMVPN with spoke-to-spoke communication 2547oDMVPN has been implemented to extend MPLS to all other branches.
What is the traffic flow behavior between branches after 2547oDMVPN implementation?
A. Traffic flows through the DMPVN hub
B. Traffic flows directly between branches only if the DMVPN configuration is changed to hub-and-spoke communication
C. Traffic flows directly between branches through service provider cloud, bypassing the DMVPN hub
D. Traffic flow does not occur between branches

Answer: A

Which IPv6 transition mechanism allows ISP_X to provide IPv6 connected by leveraging the existing MPLS IPv4 core network?

ISP_X has IPv4 only enabled in the MPLS backbone. ISP_X must provide IPv6 services to its customers including IPv6 Internet access.
Which IPv6 transition mechanism allows ISP_X to provide IPv6 connected by leveraging the existing MPLS IPv4 core network?
A. 6to4 tunnels
B. NAT444
C. 6PE
D. NAT64
E. 6RD
F. DS Lite

Answer: A

Which test can quickly identify the core link that is causing the problem?

A service provider NOC engineer received numerous support tickets from their VPN customer. This customer are reporting packet loss between two PE routers. The NOC engineer created a VRF TEMP to run test between these two PE router and no error were reported. ECMP links are used between P and PE routers.
Which test can quickly identify the core link that is causing the problem?
A. an MPLS traceroute with multipath option between the PE`s loopback
B. an extended traceroute with multipath option between PE`s loopback
C. a VRF traceroute between customers1s CE router and service provider remote PE router
D. a VRF ping between customer`s CE router and service provider remote PE router
E. an extended ping with sweep option between the PE`s Loopbacks
F. an MPLS ping with sweep option between the PE`s Loopbacks

Answer: A

AS 200 uses the CSC solution provided by AS 100 with regards to the packets originated on ABC-Site2 going toward to ABC-Site1, how many labels are in the label stack of these packets when they cross the link between CSC-PE2 and CS-P?

Refer to the exhibit.

image208 - 
AS 200 uses the CSC solution provided by AS 100 with regards to the packets originated on ABC-Site2 going toward to ABC-Site1, how many labels are in the label stack of these packets when they cross the link between CSC-PE2 and CS-P?
AS 200 uses the CSC solution provided by AS 100 with regards to the packets originated on ABC-Site2 going toward to ABC-Site1, how many labels are in the label stack of these packets when they cross the link between CSC-PE2 and CS-P?
A. 1
B. 2
C. 3
D. 4

Answer: C

Which are the two reasons for this issue?

Refer to the exhibit. The NOC team received multiple reports about poor quality of the VoIP traffic. An engineer notices that all VoIP traffic with poor quality uses Core links with QoS implemented.
Which are the two reasons for this issue? (Choose two)
A. A DoS attack on the core routers has caused high CPU utilization on the line cards that hosts the 10 Gigabit Ethernet port.
B. The VoIP traffic exceeding 1 GBPS is dropped by the policer
C. The Core links are congested, which causes stavation of VoIP traffic
D. The Bandwidth allocated is higher than 100 percent
E. The VoiP traffic on the core links is MPLS-labeled and it is not subject to QoS

Answer: A, B

On Cisco IOS devices, which IS-IS feature reduces the convergence time for prefixes designated as high priority?

On Cisco IOS devices, which IS-IS feature reduces the convergence time for prefixes designated as high priority?
A. iSPF
B. advertise passive only
C. prefix prioritization
D. Fast-Forwarding

Answer: C