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Preparation Process for Cisco 300-420 Exam
Cisco recommends the training course, which is Designing Cisco Enterprise Networks v1.0, for the individuals preparing to take the Cisco 300-420 exam. This training option equips them with the skills and knowledge required for designing enterprise networks. The candidates can take this course as the instructor-led training or e-learning education. The details of how to access it are available on the official website. Apart from this variant, the individuals can also explore other resources, such as video tutorials, practice tests, and more. All of them are designed to prepare the applicants for achieving success in their certification test on the first try.
NEW QUESTION # 25
A customer has several remote sites connected with their headquarters through microwave links. An engineer must propose a backup WAN solution based on these conditions:
Which backup WAN link type the engineer recommend?
- A. Laser link
- B. 802.16 WiMAX
- C. LTE
- D. 802.15.1 Bluetooth
Answer: C
NEW QUESTION # 26
How are wireless endpoints registered in the HTDB in a Cisco SD-Access architecture?
- A. Fabric edge nodes update the HTDB based on CAPPWAP messaging from the AP
- B. Border nodes first register endpoints and then update the HTDB
- C. Fabric APs update the HTDB with the clients' ElD and RLOC
- D. Fabric WLCs update the HTDB as new clients connect to the wireless network
Answer: D
Explanation:
NEW QUESTION # 27
Drag and drop the elements from the left onto the functions they perform in the Cisco SD-WAN architecture on the right.
Answer:
Explanation:
NEW QUESTION # 28
An engineer is creating a design to enable IPv6 to run on an existing IPv4 IS-IS network. The IPv4 and IPv6 topologies will match exactly, and the engineer plans to use the same router levels for each protocol per interface. Which IS-IS design is required?
- A. multi topology without enabling transition feature
- B. single topology with transition feature enabled
- C. multi topology with transition feature enabled
- D. single topology without enabling transition feature
Answer: B
Explanation:
Explanation
https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_isis/configuration/xe-3s/irs-xe-3s-book/ip6-route-isis For single-topology IS-IS IPv6, routers must be configured to run the same set of address families. IS-IS performs consistency checks on hello packets and will reject hello packets that do not have thesame set of configured address families. For example, a router running IS-IS for both IPv4 and IPv6 will not form an adjacency with a router running IS-IS for IPv4 or IPv6 only. In order to allow adjacency to be formed in mismatched address-families network, the adjacency-check command in IPv6 address family configuration mode must be disabled.
NEW QUESTION # 29
Refer to the exhibit.
C0FD9F48 C9ACDC725EA850EC2476EE1E
A network engineer is designing a network for AS100. The design should ensure that all traffic enters AS100 via link 1 unless there is a network failure. In the event of a failure, link 2 should function as the path for incoming traffic. Which solution should the design include?
- A. Use AS-Path prepending on R4.
- B. Use AS-Path prepending on R3.
- C. Modify the next-hop attribute on R3.
- D. Modify the next-hop attribute on R4.
Answer: A
NEW QUESTION # 30
Which solution allows overlay VNs to communicate with each other in an SD-WAN Architecture?
- A. SGTs can be used to permit traffic from one VN to another.
- B. External fusion routers can be used to map VNs to VRFs and selectively route traffic between VRFs.
- C. GRE tunneling can be configured between fabric edges to connect one VN to another.
- D. Route leaking can be used on the fabric border nodes to inject routes from one VN to another.
Answer: C
Explanation:
Section: WAN for Enterprise Networks
NEW QUESTION # 31
Which NETCONF operation creates filtering that is specific to the session notifications?
- A. <create-subscription>
- B. <logging>
- C. <commit>
- D. <notification>
Answer: A
NEW QUESTION # 32
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. any-source multicast
- C. PIM-SSM
- D. PIM-SM
Answer: C
Explanation:
Explanation
PIM-SSM is suitable for when well-known sources exist within the local PIM domain and for broadcast applications. Also, PIM-SSM eliminates the RPs and shared trees
NEW QUESTION # 33 
Refer to the exhibit. An architect must design a solution to connect bank site A with bank site B and support:
* network operation center monitoring end-to-end L3VPN and L2VPN traffic
* company adding thousands of routes in the next two years
Which two BGP solutions must the design include? (Choose two.)
- A. Apply BGP policies on all routers to filter out ABR and PE loopback IP addresses.
- B. Connect multiple IGP'LDP domains using a BGP IPv4 unicast family on the ABR.
- C. Redistribute different IGP domain routes in a BGP IPv4 routing instance.
- D. Establish full mesh IBGP peering with ail routers in different IGP domains.
- E. Transport site routes using a BGP VPNv4 address family on the PE routers.
Answer: D,E
NEW QUESTION # 34
Which routes does the overlay management protocol advertise in an SD-WAN overlay?
- A. primary, backup, and load-balanced
- B. prefix, TLOC, and service
- C. Internet, MPLS, and backup
- D. underlay, MPLS, and overlay
Answer: B
NEW QUESTION # 35
When a network is designed using IS-IS protocol, which two circuit types are supported? (Choose two.)
- A. nonbroadcast
- B. multiaccess
- C. point-to-point
- D. nonbroadcast multiaccess
- E. point-to-multipoint
Answer: B,C
Explanation:
Section: Advanced Addressing and Routing Solutions
NEW QUESTION # 36 
Refer to the exhibit. The full EIGRP routing table is advertised throughout the network. Currently, users experience data loss when any one link in the network fails. An architect optimizes the network to reduce the impact when a link fails. Which solution should the architect include in the design?
- A. Summarize the access layer networks from each access layer switch toward the aggregation layer.
- B. Summarize the access layer networks from the aggregation layer toward the core layer.
- C. Run BFD on the inter links between EIGRP neighbors.
- D. Reduce the default EIGRP hello interval and hold time.
Answer: C
NEW QUESTION # 37
Refer to the exhibit.
A customer is running HSRP on the core routers. Over time the company has grown and requires more network capacity. In the current environment, some of the downstream interfaces are almost fully utilized, but others are not. Which solution improves the situation?
- A. Configure port channel toward downstream switches.
- B. Make router R2 active for half of the VLANs.
- C. Add more interfaces to R1 and R2.
- D. Enable RSTP on the downstream switches.
Answer: B
NEW QUESTION # 38
Refer to the exhibit.
Which two solutions maximize the use of the links between the core and distribution layers? (Choose two.)
- A. use multiple unequal-cost links
- B. use RPVSTP+
- C. use multiple equal-cost links
- D. use an IGP
- E. use HSRP
Answer: C,D
NEW QUESTION # 39
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. policing
- C. RED
- D. WRED
Answer: A
NEW QUESTION # 40
Exhibit:
- A. Make Area 0 L2-only.
- B. Make R11 an L2 router.
- C. Make R31 an L1 router.
- D. Make R3 an L1L2 router.
Answer: D
Explanation:
ENSLD 300-420 cert guide page 117. When creating a backbone there should never be L1 routers between (L2 only, or) L1/L2 routers.
NEW QUESTION # 41 
Refer to the exhibit. Where must an architect plan for route summarization for the topology?
- A. from the core toward the aggregation and the access toward the aggregation
- B. from the core toward the aggregation and the aggregation toward the core
- C. from the aggregation toward the core and the aggregation toward the access
- D. from the aggregation toward the access and the access toward the aggregation
Answer: C
NEW QUESTION # 42
At which layer does Cisco Express Forwarding use adjacency tables to populate addressing information?
- A. Layer 3
- B. Layer 1
- C. Layer4
- D. Layer 2
Answer: D
NEW QUESTION # 43
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