Quiz

Question 1

Examine G0/0's interface configuration. Which of the following statements are true? (select two)

1. Voice traffic received by G0/0 should be tagged in VLAN 99.

2. Voice traffic received by G0/0 should be untagged.

3. Data traffic received by G0/0 should be tagged in VLAN 1.

4. Data traffic received by G0/0 should be untagged.

5. Data traffic received by G0/0 should be discarded.

6. G0/0 will operate as a trunk.

Solution

1. Voice traffic received by G0/0 should be tagged in VLAN 99.

1. Data traffic received by G0/0 should be untagged.

Question 2

You issue the power inline police command on a PoE-enabled switch port. What will happen if the connected device draws too much power from the switch?

1. A Syslog message will be generated.

2. The interface will be restarted and a Syslog message will be generated.

3. The interface will be err-disabled and a Syslog message will be generated.

4. The interface will be shutdown.

Solution

1. The interface will be err-disabled and a Syslog message will be generated.

Question 3

Which of the following are recommended standards for acceptable interactive audio quality? (select three)

1. Delay: 30ms or less

2. Delay: 150ms or less

3. Jitter: 30ms or less

4. Jitter: 50ms or less

5. Loss: 1% or less

6. Loss: 2% or less

Solution

1. Delay: 150ms or less

1. Jitter: 30ms or less

1. Loss: 1% or less

Question 4

Which of the following is a negative effect of tail drop?

1. TCP sliding window

2. RED

3. WRED

4. TCP global synchronization

Solution

1. TCP global synchronization

Question 5

Which of the following is the default manner of forwarding queued packets?

1. FIFO

2. CBWFQ

3. RED

4. WRED

Solution

1. FIFO

Question 6

Which of the following CoS markings are consisten with standard practice? (select three)

1. Best effort = CoS 7

2. Best effort = CoS 0

3. Voice = CoS 4

4. Voice = CoS 5

5. Video = CoS 4

6. Video = CoS 5

Solution

1. Best effort = CoS 0

1. Voice = CoS 5

1. Video = CoS 4

Question 7

What bit pattern would you find in the DSCP field of a packet marked as EF?

1. 101 011

2. 111 111

3. 111 110

4. 101 110

Solution

1. 101 110 (46)

Question 8

Which of the following AF markings provides the best service?

1. AF43

2. AF41

3. AF51

4. AF11

5. AF13

6. AF61

Solution

1. AF41

Question 9

Which of the following statements represents general best practice regarding QoS?

1. Trust markings from IP phones. Don't trust markings from PCs.

2. Trust all QoS marking.

3. Don't trust any QoS marking.

4. Trust markings from PCs. Don't trust markings from IP phones.

Solution

1. Trust markings from IP phones. Don't trust markings from PCs.

Question 10

Which of the following creates a strict priority queue for data that requires low delay/jitter/loss?

1. CDWFQ

2. LLQ

3. Weighted round-robin

4. WFQ

Solution

1. LLQ