Wide Area Network Technologies Flashcards
Which switching technology is used by the telephone company for telephone calls?
Packet
Circuit
WAN
Circuit
Circuit switching is used by the telephone companies for the network of telephone users
Which switching method allows for data transmissions even when part of the network fails?
Packet
Circuit
WAN
Packet
With a packet-switching network, the failed portion will be routed around the point of failure to continue to deliver packets
How is error checking managed on a Frame Relay network?
By network devices
By the user at the receiving PC
By the protocol used
By the protocol used
Frame Relay depends on the protocols used to manage error checking
If the network is congested and the destination device requests that the source device slow its transmission, what will occur?
The source will find a different route to send the data.
The destination will drop all packets for 30 seconds.
Nothing will happen.
Nothing will happen.
Just because a device is requested to slow transmissions, that does not mean the device will perform the action
What happens if a company uses more bandwidth than it has paid for?
Its packets will be dropped no matter the state of the network.
Its packets will be delivered even if the network is busy.
Its packets will be delivered if the bandwidth is available.
Its packets will be delivered if the bandwidth is available.
The packets will be delivered if the bandwidth is available; if it is not, they will be dropped
How many streams does the SONET network transfer?
1
2
3
1
The SONET network will multiplex multiple streams into one stream and transmit this single stream over the SONET network. Multiple streams can be combined to form the single SONET data stream
Which of the following consists of electrical pulses on a SONET network?
STM
STS
PTE
STS
The synchronous transport signal (STS) is in the form of electrical pulses
What can be used in a SONET network to allow a user’s data to remain private?
Multiplexer
LTE
Scrambler
Scrambler
The scrambler is used to randomize the stream pattern to allow the data to be encrypted. This requires a descrambler on the other end of the connection to convert the data into a usable form
What is the speed of one SONET level?
- 24 Mbps
- 84 Mbps
- 08 Mbps
51.84 Mbps
One SONET level is 51.84 Mbps. If more are added, the value is multiplied by the number of levels
What levels are the OC levels matched to?
ATM
SDH
SONET
T1
SDH
SONET
The OC levels are standards for transmitting over fiber-optic cable. The levels match those of SDH and SONET, which require fiber optics
What is the highest OC level?
64
128
192
192
192 is the highest level currently set for OC
If the primary ring fails, what is used for redundancy?
The entire secondary ring
A portion of the primary ring that has not failed and a part of the secondary ring that is equal to the primary ring that failed
A portion of the primary ring that has not failed and a part of the secondary ring that is equal to the primary ring that has not failed
A portion of the primary ring that has not failed and a part of the secondary ring that is equal to the primary ring that has not failed
The part that is used for redundancy is the portion of the primary ring that has not failed, as well as the same part of the secondary ring that has not failed
How does the FDDI token pass on the rings when functioning normally?
From one ring to the other
Randomly
In opposite directions
In opposite directions
The token is circulated in opposite directions. This helps to keep the flow of the token the same on both rings even after a failure
At what speed does FDDI operate?
10 Mbps
100 Mbps
1 Gbps
100 Mbps
FDDI operates at 100 Mbps, whether it is fiber-optic or copper cabling
In which area networking environments is ATM usable?
Dial-up
Workgroup
WAN
LAN
WAN
LAN
ATM technology can be used to create LANs and connect them to a WAN
