Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) Quiz Questions and Answers

Which switching method is used when entries are present in the output of the command show ip cache?

Answer :
  • fast switching

Explanation :

Fast switching allows higher throughput by switching a packet using a cache created by the initial packet sent to a particular destination. Destination addresses are stored in the high-speed cache to expedite forwarding. Routers offer better packet-transfer performance when fast switching is enabled. Fast switching is enabled by default on all interfaces that support fast switching. To display the routing table cache used to fast switch IP traffic, use the “show ip cache†EXEC command.

Each LSA has its own age timer. By default, how long does an LSA wait before requiring an update?

Answer :
  • 30 minutes

Explanation :

Each LSA has its own age timer. By default, an LSA waits for 30 minutes before requiring an update. The router then has to send a LSR (Link State Request) to its neighbors to get an update.

What is the difference between a RIB and a FIB?

Answer :
  • The FIB is populated based on RIB content

Explanation :

None

Which protocol is used in a DMVPN network to map physical IP addresses to logical IP addresses?

Answer :
  • NHRP

Explanation :

None

Which QoS component alters a packet to change the way that traffic is treated in the network?

Answer :
  • marking

Which statement about Cisco Express Forwarding is true?

Answer :
  • It maintains two tables in the data plane: the FIB and adjacency table.