Ultimate Guide to Prepare Free Cisco 300-420 Exam Questions and Answer
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NEW QUESTION # 122
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. dynamic spoke-to-spoke tunnels
- C. greater scalability
- D. lower traffic overhead
- E. support for anycast gateway
Answer: B,C
Explanation:
Section: WAN for Enterprise Networks
NEW QUESTION # 123
Refer to the exhibit.
An engineer must design a WAN solution so that ISP-1 is always preferred over ISP-2. The path via ISP-2 is considered as a backup and must be used only when the path to ISP-1 is down. Which solution must the engineer choose?
- A. R1:
- Routes advertised to ISP-1: 0x AS-path prepend
- Routes received from ISP-1: LOW local-preference
- Routes advertised to R2: community NO-ADVERTISE
- Routes received from R2: no action
R2:
- Routes advertised to ISP-2: 5x AS-path prepend
- Routes received from ISP-2: HIGH local-preference
- Routes advertised to R1: no action
- Routes received from R1: community NO-ADVERTISE - B. R1:
- Routes advertised to ISP-1: 5x AS-path prepend
- Routes received from ISP-1: LOW local-preference
- Routes advertised to R2: community NO-ADVERTISE
- Routes received from R2: no action
R2:
- Routes advertised to ISP-2: 0x AS-path prepend
- Routes received from ISP-2: HIGH local-preference
- Routes advertised to R1: community NO-EXPORT
- Routes received from R1: no action - C. R1:
- Routes advertised to ISP-1: 0x AS-path prepend
- Routes received from ISP-1: HIGH local-preference
- Routes advertised to R2: community NO-EXPORT
- Routes received from R2: no action
R2:
- Routes advertised to ISP-2: 5x AS-path prepend
- Routes received from ISP-2: LOW local-preference
- Routes advertised to R1: no action
- Routes received from R1: no action - D. R1:
- Routes advertised to ISP-1: 0x AS-path prepend
- Routes received from ISP-1: HIGH local-preference
- Routes advertised to R2: no action
- Routes received from R2: community NO-EXPORT
R2:
- Routes advertised to ISP-2:5x AS-path prepend
- Routes received from ISP-2: LOW local-preference
- Routes advertised to R1: community NO-ADVERTISE
- Routes received from R1: no action
Answer: C
NEW QUESTION # 124
Which PIM mode uses a shared tree only?
- A. dense
- B. source-specific
- C. sparse
- D. bidirectional
Answer: C
NEW QUESTION # 125
Refer to the exhibit. An architect must create a stable and scalable EIGRP solution for a customer. The design must:
* conserve bandwidth, memory, and CPU processing
* prevent suboptimal routing
* avoid any unnecessary queries
Which two solutions must the architect select? (Choose two.)
- A. Distribute lists
- B. Stub routing
- C. Prefix lists
- D. Route summarization
Answer: B
NEW QUESTION # 126
Which feature is used to optimize WAN bandwidth of IGMP network traffic among WAN Edge routers in the same VPN?
- A. multicast-replicator
- B. multicast RP
- C. IGMPv2
- D. multicast service routes
Answer: A
NEW QUESTION # 127
Refer to the exhibit.
Refer to the exhibit. The distribution switches serve as the layer 3 boundary. HSRP preemption is enabled. When the primary switch comes back after a failure, traffic is initially dropped. Which solution must be implemented to improve the design?
- A. Configure a higher mac-refresh interval on both HSRP devices
- B. Increase the hello timers on both HSRP devices
- C. Use the preempt delay feature on the backup HSRP device
- D. Use the preempt delay feature on the primary HSRP device.
Answer: D
NEW QUESTION # 128
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. BIDIR-PIM
- B. PIM-SM
- C. any-source multicast
- D. PIM-SSM
Answer: A
NEW QUESTION # 129
Refer to the exhibit.
Refer to the exhibit. An engineer is designing an OSPF network for a client. Requirements dictate that the routers in Area 1 should receive all routes belonging to the network, including EIGRP, except the ones originated in the RIP domain. Which action should the engineer take?
- A. Make the area 1 routers part of area 0.
- B. Make area 1 a NSSA.
- C. Make area 1 a standard OSPF area.
- D. Make area 1 a stub.
Answer: B
Explanation:
NEW QUESTION # 130
DRAG DROP
Drag and drop the characteristics from the left onto the correct telemetry mode on the right.
Select and Place:
Answer:
Explanation:
Explanation:
In a dial-in mode, the destination initiates a session to the router and subscribes to data to be streamed. Dial-in 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.
Reference:
https://www.cisco.com/c/en/us/td/docs/iosxr/asr9000/telemetry/b-telemetry-cg-asr9000-61x/b-telemetry-cg- asr9000-61x_chapter_010.html#id_36445
NEW QUESTION # 131
Which QoS feature responds to network congestion by dropping lower priority packets?
- A. WRED
- B. tail drop
- C. strict priority
- D. CBWFQ
Answer: A
NEW QUESTION # 132
Drag and drop the characteristics from the left onto the Yang model they describe on the right.
Select and Place:
Answer:
Explanation:
NEW QUESTION # 133
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. Configure each interface as either L1 or L2 circuit type
- C. Disable the default behavior of advertising the default route on the L1/L2 router
- D. Configure the router to be either L1 or L2
Answer: B
NEW QUESTION # 134 
Refer to the exhibit. An engineer must design an automatic failover solution. The solution should allow HSRP to detect a WAN 1 failure and initiate an automatic failover, making router R2 the active HSRP router. Which two solutions should the engineer choose? (Choose two.)
- A. use IP source routing
- B. use a floating static route
- C. Implement PBR on router R1
- D. Implement IP SLA on router R1
- E. Implement Enhanced Object Tracking on router R1
Answer: D,E
NEW QUESTION # 135
Drag and drop the types of WAN connectivity from the left onto the connectivity use cases on the right.
Answer:
Explanation:
Explanation
Graphical user interface, application Description automatically generated
NEW QUESTION # 136
Which control-plane technology allows the same subnet to exist across multiple network locations?
- A. FabricPath
- B. ISE mobility services
- C. VXLAN
- D. LISP
Answer: D
Explanation:
Explanation
https://www.cisco.com/c/en/us/td/docs/solutions/CVD/Campus/cisco-sda-design-guide.html
NEW QUESTION # 137
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