Cisco 300-420 Online Practice Questions and Exam Preparation

Cisco 300-420 Online Questions & Answers

• Question 241:

  An engineer must design a solution to connect a customer to the Internet. The solution will include a Layer 3 circuit with a CIR of 50 Mbps from the service provider. The hand-off from the provider's switch to the customer's router is 1Gbps. Which solution should the engineer include to prevent potential issues with choppy voice traffic?

  A. Reduce the bandwidth of the connection to the router.
  B. Implement hierarchical QoS with a parent policing policy.
  C. Implement hierarchical QoS with a parent shaping policy.
  D. Add a bandwidth statement to the router interface.
  C. Implement hierarchical QoS with a parent shaping policy.

• Question 242:

  A network engineer is redesigning a company's QoS solution. The company is currently using IP Precedence, but the engineer plans to move to DiffServ. It is important that the new solution provide backward compatibility with the current solution. Which technology should the design include?

  A. expedited forwarding
  B. assured forwarding
  C. class selector code points
  D. default per hop behavior
  C. class selector code points

• Question 243:

  A customer reports that each time a networking component fails, OSPF recalculates the backup path, with causes a short outage. Which solution must the customer implement to improve this situation?

  A. Aggressive OSPF timers
  B. LFA FRR
  C. Incremental SPF
  D. BFD
  B. LFA FRR

• Question 244:

  A customer's current Layer 2 infrastructure is running Spanning Tree 802.1d, and all configuration changes are manually implemented on each switch. An architect must redesign the Layer 2 domain to achieve these goals:

  1.reduce the impact of topology changes

  2.reduce the time spent on network administration

  3.reduce manual configuration errors

  Which two solutions should the architect include in the new design? (Choose two.)

  A. Implement Rapid PVST+ instead of STP.
  B. Implement MST instead of STP.
  C. Use VTP to propagate VLAN information and to prune unused VLANs.
  D. Configure broadcast and multicast storm control on all switches.
  E. Configure dynamic trunking protocol to propagate VLAN information.
  A. Implement Rapid PVST+ instead of STP.
  C. Use VTP to propagate VLAN information and to prune unused VLANs.

• Question 245:

  Which two functions are provided by the Cisco SD-WAN orchestration plane? (Choose two.)

  A. centralized provisioning
  B. primary authentication point
  C. NAT traversal facilitation
  D. Zero Touch Provisioning
  E. troubleshooting and monitoring
  B. primary authentication point
  C. NAT traversal facilitation

• Question 246:

  An engineer is designing an enterprise campus network. The LAN infrastructure consists of switches from multiple vendors, and Spanning Tree must be used as a Layer 2 loop prevention mechanism. All configured VLANs must be grouped in two SIP instances.

  Which standards-based Spanning Tree technology supports this design solution?

  A. MSTP
  B. RSTP
  C. Rapid PVST
  D. STP
  A. MSTP

• Question 247:

  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
  D. IP directed-broadcasts on R2

• Question 248:

  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
  C. Weight

• Question 249:

  A company's branch location uses redundant routers and links for connectivity to the headquarters. Also, to use the entire available bandwidth, the branch uses a dynamic routing protocol. An architect must design a multicast streaming solution to avoid RPF check failures because of the current network design.

  Which deployment model must the architect choose?

  A. PIM-BSR
  B. BIDIR-PIM
  C. PIM-SM
  D. PIM-SSM
  D. PIM-SSM

• Question 250:

  Which QoS feature responds to network congestion by dropping lower priority packets?

  A. CBWFQ
  B. tail drop
  C. WRED
  D. strict priority
  C. WRED