[ LiB ]Summary Chapter7. Optimizing the Use of DDR with Interface Dialer Profiles and Rotary Groups

Review Questions

1:

Which of the following digital services does ISDN provide?

  1. Voice

  2. Data

  3. Text

  4. Graphics

  5. Music

  6. Video

  7. All of the above

2:

Which of the following services does an NT2 device perform?

  1. Compression

  2. Switching

  3. Concentrating

  4. Encryption

3:

What type of interface can make up the R reference point?

  1. EIA/TIA 232-C

  2. X.25

  3. c.V.24

  4. V.35

4:

What type of standard cable does the BRI U interface use?

  1. Two-wire

  2. Four-wire

  3. Six-wire

  4. BRI-wire

5:

What happens when no more traffic is transmitted over the ISDN call?

  1. An idle timer starts.

  2. The call disconnects.

  3. The bandwidth deteriorates.

  4. Unidirectional flow changes directions.

6:

What happens if the isdn switch-type command is used in global mode?

  1. Only one interface accepts that switch type.

  2. All ISDN interfaces assume the same switch type.

  3. A few ISDN interfaces assume the same switch type.

  4. Integrated services are enhanced.

7:

True or false: Static routes are used in stub environments to save costs.

8:

What type of framing is used for modern T1 PRI configurations?

  1. sf

  2. esf

  3. crc4

  4. no-crc4

9:

Which linecode type is specified for T1 PRI configuration?

  1. ami

  2. b8zs

  3. hdb3

  4. None of the above

10:

True or false: Rate adaptation can increase the ISDN channel speed.

[ LiB ]Summary Chapter7. Optimizing the Use of DDR with Interface Dialer Profiles and Rotary Groups