1.6 Explain Network Routing at Layer 3 800-150 Practice Questions (Page 5)

Questions 21–25

1. 21application · medium

   A network administrator wants to ensure that a router immediately updates its ARP cache when a device's MAC address changes. What should the administrator do?

   • AUse static ARP entries
   • BClear the ARP cache manually
   • CDisable ARP on the interface
   • DSet a shorter ARP timeout
   Reveal Solution Discussion Select an answer first
2. 22foundation · easy

   What primary information does a router use to determine the best path to a destination network?

   • AThe destination MAC address in the frame header
   • BThe TTL value in the IP header
   • CThe routing table and the metric associated with each route
   • DThe source IP address of the packet
   Reveal Solution Discussion Select an answer first
4. 23expert · hard

   A network has two routers connecting two sites. Router A has a static route to the remote site, and Router B is running OSPF. The static route on Router A has an administrative distance of 1, and OSPF has an administrative distance of 110. The network administrator wants to use the OSPF route as the primary path and the static route as a backup. What should the administrator do?

   • AIncrease the administrative distance of the static route to 120
   • BChange the OSPF metric to be lower than the static route's metric
   • CRemove the static route
   • DDecrease the administrative distance of OSPF to 1
   Reveal Solution Discussion Select an answer first
5. 24foundation · easy

   What is the primary function of the Address Resolution Protocol (ARP)?

   • ATo assign IP addresses to hosts dynamically
   • BTo route packets between different networks
   • CTo map an IPv4 address to a MAC address on a local network
   • DTo translate private IP addresses to public IP addresses
   Reveal Solution Discussion Select an answer first
6. 25foundation · easy

   What does the administrative distance (AD) of a route represent?

   • AThe physical distance in kilometers to the destination
   • BThe trustworthiness of the source of the route
   • CThe cost of the route based on bandwidth and delay
   • DThe number of hops to the destination network
   Reveal Solution Discussion Select an answer first