Cisco 300-420 Ebook 2021

NEW QUESTION 1
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

Answer: BE

NEW QUESTION 2
A network solution is being designed for a company that connects to multiple Internet service providers. Which Cisco proprietary BGP path attribute will influence outbound traffic flow?

• A. Local Preference
• B. MED
• C. Weight
• D. AS Path
• E. Community

Answer: C

NEW QUESTION 3
Company A recently acquired another company. Users of the newly acquired company must be able to access a server that exists on Company A’s network, both companies use overlapping IP address ranges. Which action conserves IP address space and provides access to the server?

• A. Use a single IP address to create overload NAT
• B. Use a single IP address to create a static NAT entry
• C. Build one-to-one NAT translation for every user that needs access
• D. Re-IP overlapping address space in the acquired company

Answer: A

NEW QUESTION 4
A router running ISIS is showing high CPU and bandwidth utilization. An engineer discovers that the router is configured as L1/L2 and has L1 and L2 neighbors. Which step optimizes the design to address the issue?

• A. Make this router a DIS for each of the interfaces
• B. Disable the default behavior of advertising the default route on the L1/L2 router
• C. Configure the router to be either L1 or L2
• D. Configure each interface as either L1 or L2 circuit type

Answer: D

NEW QUESTION 5
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 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 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 8
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 9
An infrastructure team is concerned about the shared memory utilization of a device, and for this reason, they need to monitor the device state. Which solution limits impact on the device and provides the required data?

• A. IPFIX
• B. static telemetry
• C. on-change subscription
• D. periodic subscription

Answer: A

NEW QUESTION 10
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 11
An enterprise customer has these requirements:
end-to-end QoS for the business-critical applications and VoIP services based on CoS marking.
flexibility to offer services such as IPv6 and multicast without any reliance on the service provider.
support for full-mesh connectivity at Layer 2.
Which WAN connectivity option meets these requirements?

• A. VPWS
• B. MPLS VPN
• C. DMVPN
• D. VPLS

Answer: D

NEW QUESTION 12
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 13
A network engineer must connect two sites across a public network using a secure tunneling technology that supports multicast traffic. Which technology must be chosen?

• A. IPsec
• B. GRE
• C. PPTP
• D. GRE over IPsec

Answer: D

NEW QUESTION 14
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 15
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 16
Which two steps can be taken to improve convergence in an OSPF network? (Choose two.)

• A. Use Bidirectional Forwarding Detection
• B. Merge all the areas into one backbone area
• C. Tune OSPF parameters
• D. Make all non-backbone areas stub areas
• E. Span the same IP network across multiple areas.

Answer: CD

NEW QUESTION 17
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 18
Which method will filter routes between EIGRP neighbors within the same autonomous system?

• A. distribute-list
• B. policy-based routing
• C. leak-map
• D. route tagging

Answer: A

NEW QUESTION 19
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 20
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 21
A company with multiple service providers wants to speed up BGP convergence time in the event a failure occurs with their primary link. Which approach achieves this goal and does not impact router CPU utilization?

• A. Utilize BFD and tune the multiplier to 50
• B. Lower the BGP hello interval
• C. Decrease the BGP keepalive timer
• D. Utilize BFD and keep the default BGP timers

Answer: C

NEW QUESTION 22
Refer to the exhibit.

EIGRP has been configured on all links. The spoke nodes have been configured as EIGRP stubs, and the WAN links to R3 have higher bandwidth and lower delay than the links to R4. When a
link failure occurs at the R1-R2 link, what happens to traffic on R1 that is destined for a subnet attached to R2?

• A. R1 has no route to R2 and drops the traffic
• B. R1 load-balances across the paths through R3 and R4 to reach R2
• C. R1 forwards the traffic to R3, but R3 drops the traffic
• D. R1 forwards the traffic to R3 in order to reach R2

Answer: D

NEW QUESTION 23
......