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300-420 Dumps

300-420 Real Exam Dumps Questions and answers 11-20

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Question No.11

Which feature is required for graceful restart to recover from a processor failure?

A.

Cisco Express Forwarding

B.

Virtual Switch System

C.

Stateful Switchover

D.

Bidirectional Forwarding Detection

Correct Answer: A

Question No.12

When designing interdomain multicast, which two protocols are deployed to achieve communication between multicast sources and receivers? (Choose two.)

A.

IGMPv2

B.

BIDIR-PIM

C.

MP-BGP

D.

MSDP

E.

MLD

Correct Answer: CD

Question No.13

What is a benefit of using VRRPv3 as compared to VRRPv2?

A.

VRRPv3 supports IPv4 and IPv6

B.

VRRPv3 supports authentication

C.

VRRPv3 supports preemption

D.

VRRPv3 supports stateful switchover

Correct Answer: A

Question No.14

An engineer must design a multicast network for a financial application. Most of the multicast sources also receive multicast traffic (many-to-many deployment model). To better scale routing tables, the design must not use source trees. Which multicast protocol satisfies these requirements?

A.

PIM-SSM

B.

PIM-SM

C.

MSDP

D.

BIDIR-PIM

Correct Answer: B

Question No.15

Which feature must be incorporated into the campus LAN design to enable Wake on LAN?

A.

dynamic ARP Inspection Snooping on layer 2 devices

B.

directed broadcasts on layer 3 devices

C.

proxy ARP on layer 3 devices

D.

DHCP Snooping on layer 2 devices

Correct Answer: B

Question No.16

Which design consideration must be made when dual vEdge routers are deployed at a branch site?

A.

Use BGP AS-path prepending to influence egress traffic and use MED to influence ingress traffic from the branch.

B.

HSRP priorities must match the OMP routing policy to prefer one vEdge over the other.

C.

Traffic must be symmetrical as it egresses the vEdges and returns from remote sites for DPI to function properly.

D.

Configure BFD between vEdge routers to detect sub-second link failures.

Correct Answer: A

Question No.17

How do endpoints inside an SD-Access network reach resources outside the fabric?

A.

a VRF fusion router is used to map resources in one VN to another VN

B.

Fabric borders use VRFs to map VNs to VRFs

C.

SD-Access transit links are used to transport encapsulated traffic from one fabric to another

D.

A fabric edge is used to de-encapsulate VXLAN traffic to normal IP traffic then transported over the outside network

Correct Answer: D

Question No.18

Which design consideration must be made when using IPv6 overlay tunnels?

A.

Overlay tunnels that connect isolated IPv6 networks can be considered a final IPv6 network architecture.

B.

Overlay tunnels should only be considered as a transition technique toward a permanent solution.

C.

Overlay tunnels can be configured only between border devices and require only the IPv6 protocol stack.

D.

Overlay tunneling encapsulates IPv4 packets in IPv6 packets for delivery across an IPv6 infrastructure.

Correct Answer: C

Question No.19

An engineer must design a VPN solution for a company that has multiple branches connecting to a main office. What are two advantages of using DMVPN instead of IPsec tunnels to accomplish this task? (Choose two.)

A.

support for AES 256-bit encryption

B.

greater scalability

C.

support for anycast gateway

D.

lower traffic overhead

E.

dynamic spoke-to-spoke tunnels

Correct Answer: BE

Question No.20

An engineer is designing a QoS policy that queues excess packets for later transmission. Which mechanism must be included in the design?

A.

shaping

B.

WRED

C.

policing

D.

RED

Correct Answer: A

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