Most Recent 300-420 Item Pool 2021

NEW QUESTION 1
Which function are fabric intermediate nodes responsible for in an SD-Access Architecture?

• A. mapping EIDs to RLOCs
• B. encapsulating user traffic in a VXLAN header including the SGT
• C. registering new endpoints in the HTDB
• D. transporting IP packets between edge nodes and border nodes

Answer: D

NEW QUESTION 2
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

Answer: B

NEW QUESTION 3
When a network is designed using IS-IS protocol, which two circuit types are supported? (Choose two.)

• A. nonbroadcast multiaccess
• B. multiaccess
• C. point-to-multipoint
• D. nonbroadcast
• E. point-to-point

Answer: BE

NEW QUESTION 4
What is an advantage of designing an out-of-band network management solution?

• A. In the event of a production network outage, network devices can still be managed.
• B. There is no separation between the production network and the management network.
• C. In the event of a production network outage, it can be used as a backup network path.
• D. It is less expensive than an in-band management solution

Answer: A

NEW QUESTION 5
Which consideration must be taken into account when using the DHCP relay feature in a Cisco SD-Access Architecture?

• A. DHCP-relay must be enabled on fabric edge nodes to provide the correct mapping of DHCP scope to the local anycast gateway.
• B. A DHCP server must be enabled on the border nodes to allow subnets to span multiple fabric edges.
• C. DHCP servers must support Cisco SD-Access extensions to correctly assign IPs to endpoints in an SDAccess fabric with anycast gateway.
• D. DHCP Option-82 must be enabled to map the circuit IP option to the access fabric node where the DHCP discover originated.

Answer: A

NEW QUESTION 6
Drag and drop the characteristics from the left onto the correct telemetry mode on the right.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
In a dial-in mode, the destination initiates a session to the router and subscribes to data to be streamed. Dialin mode is supported over gRPC in only 64-bit platforms
In a dial-out mode, the router initiates a session to the destinations based on the subscription. All 64-bit IOS XR platforms (except for NCS 6000 series routers) support gRPC and TCP protocols. All 32-bit IOS XR platforms support only TCP.

NEW QUESTION 7
When vEdge router redundancy is designed, which FHRP is supported?

• A. HSRP
• B. OMP
• C. GLBP
• D. VRRP

Answer: D

NEW QUESTION 8
An organization is designing a detailed QoS plan that limits bandwidth to specific rates. Which two parameters are supported be the traffic policing feature? (Choose two.)

• A. violating
• B. marking
• C. shaping
• D. bursting
• E. conforming

Answer: BC

NEW QUESTION 9
Which two statements describe source trees in a multicast environment? (Choose two.)

• A. Source trees guarantee the minimum amount of network latency for forwarding multicast traffic
• B. Source trees create an optimal path between the source and the receivers
• C. Source trees use a single common root placed at some chosen point in the network
• D. Source trees can introduce latency in packet delivery
• E. Source trees can create suboptimal paths between the source and the receivers

Answer: AB

NEW QUESTION 10
An engineer is looking for a standards-driven YANG model to manage a multivendor network environment. Which model must the engineer choose?

• A. Native
• B. OpenConfig
• C. IETF
• D. IEEE NETCONF

Answer: C

NEW QUESTION 11
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

Answer: A

NEW QUESTION 12
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

Answer: A

NEW QUESTION 13
Refer to the exhibit.

An engineer must optimize the traffic flow of the network. Which change provides a more efficient design between the access and the distribution layer?

• A. Add a link between access switch A and access switch B
• B. Reconfigure the distribution switch A to become the HSRP Active
• C. Change the link between distribution switch A and distribution switch B to be a routed link
• D. Create an EtherChannel link between distribution switch A and distribution switch B

Answer: B

NEW QUESTION 14
Drag and drop the properties from the left onto the protocols they describe on the right.

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:

NEW QUESTION 15
Which control-plane technology allows the same subnet to exist across multiple network locations?

• A. LISP
• B. VXLAN
• C. FabricPath
• D. ISE mobility services

Answer: B

NEW QUESTION 16
An engineer is working for a large cable TV provider that requires multiple sources streaming video on different channels using multicast with no rendezvous point. Which multicast protocol meets these requirements?

• A. PIM-SM
• B. PIM-SSM
• C. any-source multicast
• D. BIDIR-PIM

Answer: D

NEW QUESTION 17
Which two best practices must be followed when designing an out-of-band management network? (Choose two.)

• A. Enforce access control
• B. Facilitate network integration
• C. Back up data using the management network
• D. Ensure that the management network is a backup to the data network
• E. Ensure network isolation

Answer: AE

NEW QUESTION 18
Which QoS feature responds to network congestion by dropping lower priority packets?

• A. CBWFQ
• B. tail drop
• C. WRED
• D. strict priority

Answer: C

NEW QUESTION 19
Which nonproprietary mechanism can be used to automate rendezvous point distribution in a large PIM
domain?

• A. Embedded RP
• B. BSR
• C. Auto-RP
• D. Static RP

Answer: B

NEW QUESTION 20
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

Answer: A

NEW QUESTION 21
A customer with an IPv4 only network topology wants to enable IPv6 connectivity while preserving the IPv4 topology services. The customer plans to migrate IPv4 services to the IPv6 topology, then decommission the IPv4 topology. Which topology supports these requirements?

• A. dual stack
• B. 6VPE
• C. 6to4
• D. NAT64

Answer: A

NEW QUESTION 22
Which NETCONF operation creates filtering that is specific to the session notifications?

• A. <create-subscription>
• B. <commit>
• C. <notification>
• D. <logging>

Answer: A

NEW QUESTION 23
A company is running BGP on a single router, which has two connections to the same ISP. Which BGP feature ensures traffic is load balanced across the two links to the ISP?

• A. Multihop
• B. Multipath Load Sharing
• C. Next-Hop Address Tracking
• D. AS-Path Prepending

Answer: B

NEW QUESTION 24
When IPsec VPNs are designed, what is a unique requirement if support for IP Multicast is required?

• A. encapsulation of traffic with GRE or VTI
• B. IPsec forwarding using transport mode
• C. additional bandwidth for headend
• D. IPsec forwarding using tunnel mode

Answer: A

NEW QUESTION 25
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