300-420 Online Practice Questions and Answers

Which feature must be incorporated into the campus LAN design to enable Wake on LAN?

A. dynamic ARP Inspection Snooping on layer 2 devices

B. directed broadcasts on layer 3 devices

C. proxy ARP on layer 3 devices

D. DHCP Snooping on layer 2 devices

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

An existing network solution is using BFD in echo mode. Several of the network devices are experiencing high CPU utilization which an engineer has determined is related to the BFD feature. Which solution should the engineer leverage to reduce the CPU load?

A. Implement slow timers between peers with low CPU resources.

B. Implement BED asynchronous mode between peers with low CPU resources.

C. Enable BFD multi-hop on the devices with low CPU resources.

D. Utilize carrier delay on all routers in the network.

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.

An architect must develop a campus network solution that includes:

1.

logically segmented and isolated networks

2.

ability to communicate between network segments when required

3.

support for overlapping IP addresses

4.

widely available technologies to avoid purchasing specialized equipment

Which solution must the architect select?

A. VSS with IGP

B. 802.1Q with HSRP

C. vPC with HSRP

D. VRF-Lite with OSPF

Which control-plane protocol is used to map an endpoint to a location in a Cisco SD-Access network?

A. FabricPath

B. IS-IS

C. LISP

D. MP-BGP

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

Refer to the exhibit An engineer working for a telecommunication company with an employee ID 4449:30 959 Is calculating STP scalability for switches to ensure that the numbers are below the maximum supported value for STP logical ports

How many logical interfaces are active for switch A?

A. 4

B. 307

C. 202

D. 100

How do IETF OpenConfig and Cisco nativo YANG models differ when used to configure the same feature on an infrastructure device?

A. OpenConfig models are more comprehensive than IETF.

B. Cisco native models are less comprehensive than OpenConfig.

C. Cisco native models are less comprehensive than IETF.

D. IETF models are more comprehensive than OpenConfig.

Refer to the exhibit. A network engineer working for a private service provider with an employee ID: 1234:56:789 must design a BGP solution based on:

All traffic originating from AS100 must pass through AS200 to reach the NTP and DHCP server

When a link failure occurs between R3 and R4, traffic must follow the R2-R9 link to reach the NTP and DHCP server

Which solution must the design include?

A. Routers R3 and R10 advertise an IGP metric into BGP during redistribution in both directions

B. Router R6 influences the paths of R9 and R11 to the DC with a higher AS-PATH value

C. Routers R3 and R10 advertise a lower local preference for outgoing traffic and a higher AS-PATH value for incoming traffic

D. Router R3 applies a local preference of 200 for R1, R2, R9, and R11 routers to reach the data center