Chapter 4: The Physical and Data Link
Layers UPDATED ACTUAL Exam
Questions and CORRECT Answers
Frame Format - CORRECT ANSWER - Is what defines the structure of the 1's and 0's
being transmitted.
Reliability - CORRECT ANSWER - The availability and integrity of the data
transmission.
Frequency - CORRECT ANSWER - The number of complete waves that pass a given
point in a certain amount of time
Hertz - CORRECT ANSWER - One electrical energy cycle from positive voltage (1) to
negative voltage (0).
Four most common types of transmission media: - CORRECT ANSWER - -Copper
Unshielded twister-pair(UTP) & shielded twisted-pair (STP)
-Coaxial Cable
-Glass/Fiber Optics
-Air
Unshielded Twisted Pair (UTP) - CORRECT ANSWER - Networking cable that has four
twisted pairs of copper wire and a flexible outer coating.
Shielded Twisted Pair (STP) - CORRECT ANSWER - Copper network cable that has two
or four pairs of twisted wires shielded by a braided mesh and covered with an outside coating.
Coaxial Cable - CORRECT ANSWER - insulated copper wire; used to carry high-speed
data traffic and television signals
, RG-6 - CORRECT ANSWER - Typically used for home audio, video, and TV
transmission equipment.
RG-58 - CORRECT ANSWER - Used for RF transmissions and antennae cabling to radio
equipment.
RG-58/U - CORRECT ANSWER - 10bASE2 Ethernet, also known as Thinnet.
RG-59/U - CORRECT ANSWER - Closed circuit television (CCTV) transmission to
monitors.
RG-8U - CORRECT ANSWER - 10Base5 Ethernet, also known as Thicknet.
RG-60U - CORRECT ANSWER - High Definition television (HDTV) and high-speed
cable modems.
Fiber Optics - CORRECT ANSWER - signals carried by light beams over glass fibers
Wavelength Division Multiplexing (WDM) - CORRECT ANSWER - A technique that
allows multiple wavelengths of light to travel through a single fiber strand, allowing for
bidirectional and full-duplex communications.
Single Mode Fiber - CORRECT ANSWER - Light travels straight through the core
Multi-Mode Fiber - CORRECT ANSWER - Light bounces off the cladding.
Air - CORRECT ANSWER - This is the transmission medium for infrared, satellite,
wireless, or radio frequency.
Layers UPDATED ACTUAL Exam
Questions and CORRECT Answers
Frame Format - CORRECT ANSWER - Is what defines the structure of the 1's and 0's
being transmitted.
Reliability - CORRECT ANSWER - The availability and integrity of the data
transmission.
Frequency - CORRECT ANSWER - The number of complete waves that pass a given
point in a certain amount of time
Hertz - CORRECT ANSWER - One electrical energy cycle from positive voltage (1) to
negative voltage (0).
Four most common types of transmission media: - CORRECT ANSWER - -Copper
Unshielded twister-pair(UTP) & shielded twisted-pair (STP)
-Coaxial Cable
-Glass/Fiber Optics
-Air
Unshielded Twisted Pair (UTP) - CORRECT ANSWER - Networking cable that has four
twisted pairs of copper wire and a flexible outer coating.
Shielded Twisted Pair (STP) - CORRECT ANSWER - Copper network cable that has two
or four pairs of twisted wires shielded by a braided mesh and covered with an outside coating.
Coaxial Cable - CORRECT ANSWER - insulated copper wire; used to carry high-speed
data traffic and television signals
, RG-6 - CORRECT ANSWER - Typically used for home audio, video, and TV
transmission equipment.
RG-58 - CORRECT ANSWER - Used for RF transmissions and antennae cabling to radio
equipment.
RG-58/U - CORRECT ANSWER - 10bASE2 Ethernet, also known as Thinnet.
RG-59/U - CORRECT ANSWER - Closed circuit television (CCTV) transmission to
monitors.
RG-8U - CORRECT ANSWER - 10Base5 Ethernet, also known as Thicknet.
RG-60U - CORRECT ANSWER - High Definition television (HDTV) and high-speed
cable modems.
Fiber Optics - CORRECT ANSWER - signals carried by light beams over glass fibers
Wavelength Division Multiplexing (WDM) - CORRECT ANSWER - A technique that
allows multiple wavelengths of light to travel through a single fiber strand, allowing for
bidirectional and full-duplex communications.
Single Mode Fiber - CORRECT ANSWER - Light travels straight through the core
Multi-Mode Fiber - CORRECT ANSWER - Light bounces off the cladding.
Air - CORRECT ANSWER - This is the transmission medium for infrared, satellite,
wireless, or radio frequency.
