Chapter 2 Physical Layer Revision

"X" is the capacity at which a medium can carry data OR the amount of data that can possibly flow. Identify X.

Throughput refers to the measure of bits transferred across the media over a given period of time.

• FALSE

• TRUE

"Y" refers to the amount of usable data that is transferred. Identify Y.

• Bandwidth

• Goodput

• Latency

• Throughput

Latency refers to the amount of time, including delays, for data to travel from one given point to another.

• TRUE

• FALSE

Select the main role of Physical Layer in transmitting data over network.

• Determine path packets taken through the network

• Provides physical addressing to the device

• Provides reliable delivery through link establishment and flow control

• Create signals that represent the bits in each frame to the media

Choose the CORRECT physical layer media that used electrical pulses as media signal.

• fiber-optic cable

• Bluetooth

• Copper cable

• Wireless

Choose the Physical Layer Technology that used light for communication.

• Twisted Pair Cable

• Console cable

• Fiber-optic

• Coaxial cable

Identify the type of cable shown in the figure.

• Console cable

• UTP cable

• STP cable

• Coaxial cable

Select the function of a twisted wire in twisted pair cable.

• To make it neat

• To make it less expensive

• To reduce noise problem

• To allow pair cables to fit

Identify the BEST term “attenuation” mean in data communication.

• loss of signal strength as distance increases

• time for a signal to reach its destination

• strengthening of a signal by a networking device

• leakage of signals from one cable pair to another