Cisco CCNP Enterprise 300-420 Questions & Answers

• Question 61:

  Refer to the exhibit.

  

  An architect is designing a network for a customer supporting a Wake-on-LAN application. Which solution must the architect choose?

  A. IP directed-broadcasts on R1

  B. spanning-tree uplinkfast on SW1

  C. spanning-tree uplinkfast on SW2

  D. IP directed-broadcasts on R2

  Correct Answer: D

  Explanation: "IP directed broadcast" must be supported on the last router to the destination subnet. Since the sleeping PC's dont have IP adresses, the machines must be calles awake by broadcast that behaves like an unicast untill they reach the destination network. There the directed broadcast is handled like a proper broadcast to wake all WOL machines. https://www.cisco.com/c/en/us/support/docs/switches/catalyst-3750-series-switches/91672- catl3-wol-vlans.html

• Question 62:

  Refer to the exhibit.

  

  A customer experienced an unexpected network outage when the link between R1 and R2 went down. An architect must design a solution to ensure network continuity in the event the link tails again. Which solution should the design include?

  A. Make R3 an L1L2 router.

  B. Make R31 an L1 router.

  C. Make Area 0 L2-only.

  D. Make R11 an L2 router.

  Correct Answer: A

  ENSLD 300-420 cert guide page 117. When creating a backbone there should never be L1 routers between (L2 only, or) L1/L2 routers.

• Question 63:

  Refer to the exhibit.

  

  An engineer is designing a Layer 2 campus network. The design must support fast convergence and leverage as much bandwidth as possible between layers. Distribution switches do support VSS; unfortunately, not all routing protocols are available for use due to license limitations. Which solution must the engineer choose?

  A. EtherChannel

  B. MEC

  C. RSTP

  D. ECMP

  Correct Answer: B

• Question 64:

  Which node performs the LISP Map-Server and Map-Resolver functions in the Cisco SD-Access network architecture?

  A. control plane node

  B. fabric edge node

  C. border node

  D. intermediate node

  Correct Answer: A

• Question 65:

  An engineer must design a management network that enables SSH, NTP, FTP, and SNMP over the production network. The design requires the management of routers and switches that exist across different networks. Which feature must the design include?

  A. Management Plane Protection

  B. dedicated management console connection per device

  C. terminal server

  D. dedicated management VRF connection per device

  Correct Answer: D

• Question 66:

  A network engineer must design a multicast solution to prevent the spoofing of multicast streams and ensure efficient bandwidth utilization. The network will be merged with another multicast domain in the future, and the merge must require minimum effort. Which two solutions meet the customer requirements? (Choose two.)

  A. PIM-SSM

  B. IGMPv3

  C. IGMPv2

  D. PIM-SM

  E. MSDP

  Correct Answer: DE

  Explanation: https://www.cisco.com/c/en/us/td/docs/ios- xml/ios/ipmulti_pim/configuration/xe-16/imc-pim-xe-16-book/imc-msdp-im-pim- sim.html#GUID-4B201DB3-2C27-4F98-977A-A1AE9DC39C21

  MSDP is a mechanism to connect multiple PIM-SM domains. The purpose of MSDP is to discover multicast sources in other PIM domains. The main advantage of MSDP is that it reduces the complexity of interconnecting multiple PIM-SM domains by allowing PIM-SM domains to use an interdomain source tree (rather than a common shared tree).

• Question 67:

  Refer to the exhibit.

  

  A customer wants to adopt a dynamic site-to-site VPN solution to secure communication for VoIP, video, and FTP traffic between the remote branches and the headquarters. The customer also wants the branches to communicate directly, thereby reducing traffic at the headquarters location. The solution most consider that the branch routers are limited in available memory. Which VPN solution meets these requirements?

  A. DMVPN Phase 2 Hub and Spoke design

  B. DMVPN Phase 3 Hub and Spoke design

  C. DMVPN Phase 3 Hierarchical design

  D. DMVPN Phase 1 Hub and Spoke design

  Correct Answer: B

• Question 68:

  An engineer is designing a network for a customer running a wireless network with a common VLAN for all APs. The customer is experiencing unicast flooding in the Layer 2 network between the aggregation and access layers. The customer wants to reduce the flooding and improve convergence time. Which solution meets these requirements?

  A. Migrate all APs to a common Layer 2 access layer switch and run Layer 3 from the aggregation layer to all remaining access layer switches.

  B. Align HSRP primary and STP root bridges and reduce ARP timers to match CAM timers on the aggregation layer switches.

  C. Migrate to a Layer 3 access campus design if the APs can run on separate VLANs.

  D. Align HSRP primary and STP root bridges if the APs cannot run on separate VLANs.

  Correct Answer: B

• Question 69:

  An architect must create a QoS solution for a customer to ensure that a 40 Mbps Internet connection is shared between four subnets based on these requirements:

  1.

  Each subnet must receive no less than 10 Mbps of download bandwidth during peak traffic times.

  2.

  A subnet can use up to 40 Mbps during nonpeak traffic times if the other subnets are idle.

  3.

  Download traffic must never experience a delay. Which solution must the architect choose?

  A. rate-limiting and shaping

  B. bandwidth percentage and policing

  C. shaping and policing

  D. bandwidth percentage and rate-limiting

  Correct Answer: B

• Question 70:

  An engineer needs a standards-driven YANG model to manage a multivendor network environment. Which model should the engineer choose?

  A. Native

  B. OpenConfig

  C. IETF

  D. IEEE NETCONF

  Correct Answer: C