COSC 354 - Networks Chapter 3 Exam Questions and Answers Already Passed Latest Update
2025-2026
How is data transferred? - Answers - By a medium
There are two major categories of media. - Answers - Conducted media
- Wireless media
What is a Twisted Pair Wire? - Answers - One or more pairs of single conductor wires that have
been twisted around each other.
- Twisting the wires helps to eliminate electromagnetic interference between the two wires.
- Shielding can further help eliminate interference
What is Twisted Pair wire classified by? Also how many? - Answers - Classified by category.
- Currently Category 1 through Category 7
- Although CAT1 , CAT2, and CAT4 are nearly obsolete.
Twisted Pair is the most...? - Answers - Common form of wire, and relatively inexpensive.
- Easy to install and can suffer from electromagnetic noise.
Coaxial Cable is? - Answers - A single wire wrapped in a foam insulation surrounded by a
braided metal shield, then covered in a plastic jacket. Cable comes in various thicknesses.
Baseband coaxial technology uses? - Answers - Digital signaling in which cable carries only on
channel of digital data.
Broadband coaxial technology uses? - Answers - Analog signals and is capable of supporting
multiple channels.
What good applications does coaxial cable have? - Answers - Good with cable television.
- More expensive and not as easy to install.
, Because of shielding in coaxial cable... - Answers - It can carry a wide bandwidth of frequencies.
Fiber-Optic Cable is? - Answers - A thin glass cable approximately a little thicker than a human
hair surrounded by a plastic coating and packaged in a insulated cable.
- A photo diode or laser generates pulses of light which travel down the fiber optic cable and are
received by a photo receptor.
Fiber-Optic cable is capable of supporting - Answers - Millions of bits per second for 1000s of
meters.
Thick Fiber-Optic cable is used for - Answers - shorter distance transmissions.
Thin Fiber-Optic cable is used for - Answers - longer transmission distances; known as single
mode fiber.
Fiber-Optic cable is susceptible to.. - Answers - Reflection.
- Thus, fiber-optic cable is not perfect either.
- Noise is still a potential problem
Which cable can carry the highest data rate for the longest distances. - Answers - Fiber-Optic
Which Cable is the most expensive? - Answers - Coaxial cable
What forms of electromagnetic waves that are used to transmit data? - Answers - Radio,
satellite transmissions, and infrared light
In wireless transmissions what is the medium? - Answers - Space is
Terrestrial Microwave Transmission - Answers - Land-based, line-of-sight transmission.
Approximately 20-30 miles between towers. Transmits data at hundreds of millions of bits per
second. Signals will not pass through solid objects. Popular with telephone companies and
business to business transmissions.
Satellite Microwave Transmission - Answers - Similar to terrestrial microwave except the signal
travels from a ground station on earth to a satellite and back to another ground station.
- Can also transmit signals from one satellite to another.
Satellites can be classified by? (What are they?) - Answers - How far out into orbit each one is
(LEO, MEO, GEO, and HEO)
2025-2026
How is data transferred? - Answers - By a medium
There are two major categories of media. - Answers - Conducted media
- Wireless media
What is a Twisted Pair Wire? - Answers - One or more pairs of single conductor wires that have
been twisted around each other.
- Twisting the wires helps to eliminate electromagnetic interference between the two wires.
- Shielding can further help eliminate interference
What is Twisted Pair wire classified by? Also how many? - Answers - Classified by category.
- Currently Category 1 through Category 7
- Although CAT1 , CAT2, and CAT4 are nearly obsolete.
Twisted Pair is the most...? - Answers - Common form of wire, and relatively inexpensive.
- Easy to install and can suffer from electromagnetic noise.
Coaxial Cable is? - Answers - A single wire wrapped in a foam insulation surrounded by a
braided metal shield, then covered in a plastic jacket. Cable comes in various thicknesses.
Baseband coaxial technology uses? - Answers - Digital signaling in which cable carries only on
channel of digital data.
Broadband coaxial technology uses? - Answers - Analog signals and is capable of supporting
multiple channels.
What good applications does coaxial cable have? - Answers - Good with cable television.
- More expensive and not as easy to install.
, Because of shielding in coaxial cable... - Answers - It can carry a wide bandwidth of frequencies.
Fiber-Optic Cable is? - Answers - A thin glass cable approximately a little thicker than a human
hair surrounded by a plastic coating and packaged in a insulated cable.
- A photo diode or laser generates pulses of light which travel down the fiber optic cable and are
received by a photo receptor.
Fiber-Optic cable is capable of supporting - Answers - Millions of bits per second for 1000s of
meters.
Thick Fiber-Optic cable is used for - Answers - shorter distance transmissions.
Thin Fiber-Optic cable is used for - Answers - longer transmission distances; known as single
mode fiber.
Fiber-Optic cable is susceptible to.. - Answers - Reflection.
- Thus, fiber-optic cable is not perfect either.
- Noise is still a potential problem
Which cable can carry the highest data rate for the longest distances. - Answers - Fiber-Optic
Which Cable is the most expensive? - Answers - Coaxial cable
What forms of electromagnetic waves that are used to transmit data? - Answers - Radio,
satellite transmissions, and infrared light
In wireless transmissions what is the medium? - Answers - Space is
Terrestrial Microwave Transmission - Answers - Land-based, line-of-sight transmission.
Approximately 20-30 miles between towers. Transmits data at hundreds of millions of bits per
second. Signals will not pass through solid objects. Popular with telephone companies and
business to business transmissions.
Satellite Microwave Transmission - Answers - Similar to terrestrial microwave except the signal
travels from a ground station on earth to a satellite and back to another ground station.
- Can also transmit signals from one satellite to another.
Satellites can be classified by? (What are they?) - Answers - How far out into orbit each one is
(LEO, MEO, GEO, and HEO)
