1.6 Explain Network Routing at Layer 3 800-150 Practice Questions (Page 6)

Questions 26–30

1. 26foundation · easy

   How does a host discover the MAC address of another host on the same subnet?

   • AIt uses the default gateway's routing table to find the MAC address
   • BIt queries the DNS server for the MAC address
   • CIt sends a broadcast ARP request asking for the owner of the target IP address
   • DIt sends a unicast ARP request to the target host's IP address
   Reveal Solution Discussion Select an answer first
2. 27foundation · easy

   Which IPv4 address class is identified by a first octet in the range 192–223?

   • AClass A
   • BClass B
   • CClass C
   • DClass D
   Reveal Solution Discussion Select an answer first
4. 28foundation · easy

   Which entry in a routing table specifies the address of the router that will receive the packet next?

   • AAdministrative distance
   • BNext-hop address
   • CMetric
   • DNetwork prefix
   Reveal Solution Discussion Select an answer first
5. 29application · medium

   A small office router has a default route pointing to an ISP gateway and a static route to a branch office network. A dynamic routing protocol is also running, and it has learned a route to the same branch network. The router must always use the static route for the branch network, regardless of what the dynamic protocol learns. What should you do?

   • AChange the static route's metric to a lower value
   • BSet a higher administrative distance on the static route
   • CRemove the dynamic routing protocol from the router
   • DSet a lower administrative distance on the static route
   Reveal Solution Discussion Select an answer first
6. 30application · medium

   A network administrator notices that a router's ARP cache contains an entry for a device that has been removed from the network. The entry is still present after several minutes. What is the most likely reason the entry remains?

   • AThe router is configured to never age out ARP entries
   • BThe ARP cache entry has a long timeout value
   • CThe ARP cache is full and cannot remove entries
   • DThe device is still sending ARP requests
   Reveal Solution Discussion Select an answer first