300-420 Practice Test

300-420 Practice Test practice questions, page 9 of 17, with answer review and explanations.

Question 41

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?

  1. 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
  2. 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
  3. 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
  4. 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

Question 42

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

  1. dynamic ARP Inspection Snooping on layer 2 devices
  2. directed broadcasts on layer 3 devices
  3. proxy ARP on layer 3 devices
  4. DHCP Snooping on layer 2 devices

Question 43

Refer to the exhibit. An engineer must optimize the traffic flow of the network. Which change provides a more efficient design between the access layer and the distribution layer?

  1. Add a link between access switch A and access switch B
  2. Reconfigure the distribution switch A to become the HSRP Active
  3. Change the link between distribution switch A and distribution switch B to be a routed link
  4. Create an EtherChannel link between distribution switch A and distribution switch B

Question 44

Which first hop redundancy protocol ensures that load balancing occurs over multiple routers using a single virtual IP address and multiple virtual MAC addresses?

  1. GLBP
  2. IRDP
  3. VRRP
  4. HSRP

Question 45

A company with multiple service providers wants to speed up BGP convergence time in the event a failure occurs with their primary link. Which approach achieves this goal and does not impact router CPU utilization?

  1. Utilize BFD and tune the multiplier to 50
  2. Lower the BGP hello interval
  3. Decrease the BGP keepalive timer
  4. Utilize BFD and keep the default BGP timers