Cisco 300-420 Training Tools 2021

NEW QUESTION 1
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 2
Which design consideration should be observed when EIGRP is configured on Data Center switches?

• A. Perform manual summarization on all Layer 3 interfaces to minimize the size of the routing table.
• B. Prevent unnecessary EIGRP neighborships from forming across switch virtual interfaces.
• C. Lower EIGRP hello and hold timers to their minimum settings to ensure rapid route reconvergence.
• D. Configure multiple EIGRP autonomous systems to segment Data Center services and applications.

Answer: A

NEW QUESTION 3
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 4
An engineer must propose a QoS architecture model that allows an application to inform the network of its traffic profile and to request a particular type of service to support its bandwidth and delay requirements. The application requires consistent and dedicated bandwidth end to end. Which QoS architecture model meets these requirements?

• A. DiffServ
• B. LLQ
• C. WRED
• D. IntServ

Answer: D

NEW QUESTION 5
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 6
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

Answer: D

NEW QUESTION 7
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 8
A customer is discussing QoS requirements with a network consultant. The customer has specified that endto- end path verification is a requirement. Which QoS solution meets this requirement?

• A. IntServ model with RSVP to support the traffic flows
• B. DiffServ model with PHB to support the traffic flows
• C. marking traffic at the access layer with DSCP to support the traffic flows
• D. marking traffic at the access layer with CoS to support the traffic flows

Answer: A

NEW QUESTION 9
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

Answer: B

NEW QUESTION 10
A branch office has a primary L3VPN MPLS connection back to the main office and an IPSEC VPN tunnel that serves as backup. Which design ensures that data is sent over the backup connection only if the primary MPLS circuit is down?

• A. Use EIGRP to establish a neighbor relationship with the main office via L3VPN MPLS and the IPSECVPN tunnel.
• B. Use BGP with the multipath feature enabled to force traffic via the primary path when available.
• C. Use static routes tied to an IP SLA to prefer the primary path while a floating static route points to the backup connection.
• D. Use OSPF with a passive-interface command on the backup connection.

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 solution allows overlay VNs to communicate with each other in an SD-WAN Architecture?

• A. External fusion routers can be used to map VNs to VRFs and selectively route traffic between VRFs.
• B. GRE tunneling can be configured between fabric edges to connect one VN to another.
• C. SGTs can be used to permit traffic from one VN to another.
• D. Route leaking can be used on the fabric border nodes to inject routes from one VN to another.

Answer: B

NEW QUESTION 13
What is the purpose of an edge node in an SD-Access network fabric?

• A. Edge nodes identify and authenticate endpoints and register endpoint information with control plane nodes.
• B. Edge nodes track endpoint IDs to location mappings, along with IPv4, IPv6, or MAC addresses.
• C. Edge nodes are the gateway between the fabric domain and network outside of the fabric.
• D. Edge nodes resolve lookup requests from edge and border nodes to locate destination endpoint IDs.

Answer: A

NEW QUESTION 14
When vEdge router redundancy is designed, which FHRP is supported?

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

Answer: D

NEW QUESTION 15
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 16
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 17
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.

Answer: C

NEW QUESTION 18
A company is using OSPF between its HQ location and a branch office. HQ is assigned area 0 and the branch office is assigned area 1. The company purchases a second branch office, but due to circuit delays to HQ, it decides to connect the new branch office to the creating branch office as a temporary measure. The new branch office is assigned area 2. Which OSPF configuration enables all three locations to exchange routes?

• A. The existing branch office must be configured as a stub area
• B. A virtual link must be configured between the new branch office and HQ
• C. A sham link must be configured between the new branch office and HQ
• D. The new branch office must be configured as a stub area

Answer: B

NEW QUESTION 19
What is one function of the vSmart controller in an SD-WAN deployment?

• A. orchestrates vEdge and cEdge connectivity
• B. responsible for the centralized control plane of the SD-WAN network
• C. provides centralized network management and a GUI to monitor and operate the SD-WAN overlay
• D. provides a data-plane at branch offices to pass traffic through the SD-WAN network

Answer: B

NEW QUESTION 20
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 21
Which two routing protocols allow for unequal cost load balancing? (Choose two.)

• A. EIGRP
• B. IS-IS
• C. BGP
• D. OSPF
• E. RIPng

Answer: AC

NEW QUESTION 22
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

Answer: CD

NEW QUESTION 23
When a first hop redundancy solution is designed, which protocol ensures that load balancing occurs over multiple routers using a single virtual IP address and multiple virtual MAC addresses?

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

Answer: A

NEW QUESTION 24
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.

Answer: A

NEW QUESTION 25
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