Chapter 3


1.

Approximately how many minutes of downtime per year does a network experience if it has the "five nines" of availability?

  1. 53 minutes

  2. 46 minutes

  3. 16 minutes

  4. 5 minutes

2.

Which of the following offer Layer 3 redundancy in a network? (Select the two best answers.)

  1. 802.1w

  2. VRRP

  3. HSRP

  4. RSTP

3.

An analog phone can connect to which of the following router interfaces?

  1. BRI

  2. FXO

  3. E&M

  4. FXS

4.

The wall jack in your home, where you plug in your analog telephone, can connect to which of the following router interfaces?

  1. BRI

  2. FXO

  3. E&M

  4. FXS

5.

Identify two valid framing types for a T1 circuit.

  1. AMI

  2. SF

  3. B8ZS

  4. ESF

6.

Select the type of line coding that replaces a byte containing eight zeros with two bipolar violations.

  1. AMI

  2. SF

  3. B8ZS

  4. ESF

7.

How many channels does a T1 circuit have?

  1. 16

  2. 24

  3. 30

  4. 32

8.

What channel on an ISDN circuit carries signaling information?

  1. A

  2. B

  3. C

  4. D

9.

Which of the following parameters are configurable on an FXS interface? (Select the two best answers.)

  1. Signal type

  2. Ring number

  3. Ring frequency

  4. Dial type

10.

An ISDN BRI circuit has how much usable bandwidth (that is, not including the D channel)?

  1. 56 kbps

  2. 64 kbps

  3. 128 kbps

  4. 256 kbps




Voice over IP First-Step
Voice over IP First-Step
ISBN: 1587201569
EAN: 2147483647
Year: 2005
Pages: 138
Authors: Kevin Wallace

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