Note: These answers will give you a 76.2%. Please correct any answers you
think are wrong
Which two statements describe the function of time-division multiplexing?
Multiple data streams share one common channel.
Conversations that require extra bandwidth receive any unused time slices.
Time slots are utilized on a first-come, first-served basis. *****
Packets that are sent during transmission are reconstructed at the receiving end.
Priority can be dedicated to one data source.
At which two layers of the OSI model does a WAN operate? (Choose two.)
Layer 1 ****
Layer 2 ****
Which three statements describe functions of the Point-to-Point Protocol with
regards to the OSI model? (Choose three.)
operates at all layers of the OSI model
provides a mechanism to multiplex several network layer protocols ****
can be configured on both synchronous and asynchronous serial interfaces
uses Layer 3 of the OSI model to establish and maintain a session between
uses the data link layer to configure such options as error detection and
uses network control protocols to test and maintain connectivity between
When customers use credit cards to make purchases at a small business, a
modem is heard dialing a telephone number to transfer the transaction data to the
central office. What type of WAN serial connection is in use?
circuit switched *****
Permanent virtual circuits and switched virtual circuits are both part of which
option for WAN connectivity?
circuit switching ****
Which two options can LCP negotiate? (Choose two.)
link quality ****
dynamic flow control
compression and network layer address for IP
connection-oriented or connectionless communication methods
Why are Network Control Protocols used in PPP?