Networking Fundamentals Review Questions
Page 101
1. _____ Signals are sent through copper core cable as pulsating electrical energy.
2. Pulsating light waves are commonly sent through _____ cable.
3. Wireless technology commonly transmits _____ waves, _____ waves, and _____ through
the atmosphere.
4. What are the two types of electrical signals?
5. Time affects the degree of the slope in a(n) _____ signal.
6. Time affects the duration of the voltage level in a(n) _____ signal.
7. How often an analog or digital cycle repeats in one second is called _____.
8. Frequency is measured in _____ and is represented by the abbreviation _____.
9. How many times does an analog cycle repeat in a 2.3kHz electronic signal?
10. How many times does a digital cycle repeat in a 10MHz electronic signal?
11. What is attenuation?
12. Noise and crosstalk are types of _____.
13. What is latency?
14. A method of transmitting data in the form of a digital signal, using the entire bandwidth
of a cable is called _____.
15. A method of transmitting data in the form of several analog signals at the same time is
called _____.
16. List the three modes in which communication can occur.
17. What is the difference between half-duplex and full-duplex communication?
18. _____ is opposition to current flow in a DC circuit, and _____ opposition to current flow
in an AC circuit.
19. The size of a conductor’s diameter is described by what rating?
20. Which conductor is larger, one that has a 22AWG rating or one that has 24AWG rating?
21. RG-58 is also referred to as _____.
22. List the following characteristics of a 10Base2 network: topology, cable type, connector
type, maximum segment length, minimum cable length, and data rate.
23. Explain the 5-4-3 rule and list the 802.3 classifications to which it applies.
24. List the following characteristics of a 10BaseT network: topology, cable type, connector
type, maximum segment length, minimum cable length, and data rate.
25. What will happen to an electronic signal in a 10BaseT network if it passes through more
than four hubs?
26. What is the term used for a circuit path that is shorter than its intended path?
27. What is the term used for an incomplete circuit path?
28. What is the term used to describe a wire that comes in contact with a metal enclosure that
is touching the earth?
29. Name three possible cable problems that might result from improperly wiring twisted
cable pairs.
Answers:
1. Electronic
2. Fibre-optic cable
3. Pulsating, radio, micro and infrared light, waves
4. Analog and digital
5. Analog
6. Digital
7. Frequency
8. Hertz, Hz
9. 2300 cycles
10. 10 times 10 to the power of 6, cycles
11. All electronic signals degenerate or lose amplitude, over long distances. The loss of
signal strength is referred to as attenuation.
12. Interference
13. Latency is the amount of time is takes a signal to travel from its source to its destination.
14. Baseband transmission
15. Broadband transmission
16. Simplex, half-duplex, and full-duplex
17. Full duplex: a communication mode in which bi-directional communication occurs
simultaneously
Half duplex: a communication mode in which bi-directional communication occurs in
one direction at a time. \
18. resistance, impedance
19. AWG rating
20. The smaller the number the larger the diameter of the wire: hence a 22AWG conductor is
larger than a 24 AWG rated conductor.
21. Thinnet
22. 10Base2:
Topology: bus
Cable- type:RG-58 \ Thinnet
Connector- type: IEEE 802.3
Maximum segment length:185 m
Minimum cable length: .5 m
Data rate:10Mbps
23. A 10Base2 network must follow the 5-4-3 rule. This rule states that a 10Base2 network
can have a total of 5 segments, 4 repeaters, and 3 segments that are connected to the
computers. The rule was developed to limit signal latency. Both the 10Base2 and
10Base5 classifications follow this rule.
24. 10BaseT:
Topology: star
Cable- type: category 3, 4 or 5 cable
Connector- type: IEEE 802.3
Maximum segment length:100 m
Minimum cable length: .6 m
Data rate:10Mbps
25. The latency of the signal becomes excessive and causes the electronic signal to exceed
its TLL setting. The electronic signal is then destroyed.
26. In cabling, when two conductors are improperly connected and result in a shorter circuit
path, it is known as “short”. When a “short” occurs in a network cable, data takes a
shorter route and does not reach its destination.
27. An incomplete circuit is known as an “open” circuit, because there is an open spot along
the length of the conductor. When an “open” occurs in a network system, no data can
travel past the point of open.
28. A “ground” occurs when a conductor connects to the earth through a continuous path.
When a “ground” occurs in a network cable, all data is prevented from reaching its
destination.
29. Reversed pair: a wiring fault in which conductors within a twisted pair cable pair reverse
their connection at the opposite end of the cable.
Crossed pair: a wiring fault in which two pairs within a twisted pair cable have switched
positions at the opposite end of the cable.
Split pair: a wiring fault in which one conductor from each of two pairs within a twisted
pair cable have switched positions at the opposite end of the cable.