Approximately how many minutes of downtime per year does a network experience if it has the "five nines" of availability?
53 minutes
46 minutes
16 minutes
5 minutes
Which of the following offer Layer 3 redundancy in a network? (Select the two best answers.)
802.1w
VRRP
HSRP
RSTP
An analog phone can connect to which of the following router interfaces?
BRI
FXO
E&M
FXS
The wall jack in your home, where you plug in your analog telephone, can connect to which of the following router interfaces?
Identify two valid framing types for a T1 circuit.
AMI
SF
B8ZS
ESF
Select the type of line coding that replaces a byte containing eight zeros with two bipolar violations.
How many channels does a T1 circuit have?
16
24
30
32
What channel on an ISDN circuit carries signaling information?
A
B
C
D
Which of the following parameters are configurable on an FXS interface? (Select the two best answers.)
Signal type
Ring number
Ring frequency
Dial type
An ISDN BRI circuit has how much usable bandwidth (that is, not including the D channel)?
56 kbps
64 kbps
128 kbps
256 kbps