Ccna certification Practice Tests

A. LLQ

B. FIFO

C. CBWFQ

D. PQ

 83.  Which statement is correct about policing of traffic for QoS?

A.  Policing holds packets in the queue over the configured bit rate to cause delay.

B.  Policing drops packets over the configured bit rate to cause loss.

C.  Policing holds packets in the queue over the configured bit rate to cause jitter.

D.  Policing slows packets in the queue over the configured bit rate to adhere to the  

bit rate.

 84.  Why should QoS policing be implemented?

A.  To help police LAN applications

B.  To maintain a contracted CIR

C.  To help police WAN applications

D.  To maintain a contracted burst rate

 85.  How do congestion avoidance tools help to prevent tail drop?

A.  When the queue depth is full, a percentage of TCP packets are dropped.

B.  When the queue depth is empty, a percentage of TCP packets are dropped.

C.  When the queue depth is below the minimum threshold, a percentage of TCP packets 

are dropped.

D.  When the queue depth is above the minimum threshold, a percentage of TCP packets 

are dropped.

 86.  If a traffic is marked with AF31 and another traffic pattern is marked with AF41, which 

statement explains the traffic markings?

A.  AF31 marked traffic has a better queue than AF41 marked traffic.

B.  AF41 marked traffic has a better queue than AF31 marked traffic.

C.  Both AF31 and AF41 marked traffic has an equal queue.

D.  During high congestion, AF41 queues will be dropped and AF31 queues won’t.

 87.  What is required before generating the encryption keys for SSH on a router or switch?