Exam (elaborations)
COS Assignment 2
- Institution
- University Of South Africa (Unisa)
Questions and answers for COS2626 Assignment 2 of 2022 100% correct
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Computer Networks ICOS2626
2022
Assignment 2
Unique Number: 879235
School of Computing
,Question 1
Which of the following statements regarding bandwidth and throughput are TRUE
(More than one statement applies)?
a. Bandwidth is the theoretical potential for data to transmit during a given period of time.
b. Throughput refers to the number of data bits (0s and 1s) that are actually received across
a connection each second.
c. Bandwidth is also referred to as payload rate or effective data rate.
d. Throughput and bandwidth are measured in Mbps (megabits per second) or Gbps
(gigabits per second)
Question 2
Which one of the following statements describes a transmission flaw that is occurring
due to attenuation?
a. A customer modem is continuously losing signal due to large distance from the
transmitting device.
b. A network switch interface is dropping due to a powerful radio transmitter in the adjacent
room.
c. A customer's video conferencing application is experiencing delay in audio and video
that comes and goes.
d. Two network interfaces are experiencing problems at the same time due to the cables
having adjacent runs.
Question 3
Which statements regarding simplex, half-duplex and duplex transmission are FALSE
(More than one statement applies)?
a. When signals are free to travel in both directions over a medium simultaneously, the
transmission is considered duplex.
b. A football coach calling out orders to his team through a megaphone is using half-duplex
communication.
c. An apartment's intercom system that requires you to press a "talk" button to allow your
voice to be transmitted over the wire uses duplex communication.
d. Modern NICs (Network Interface Cards) use half-duplex by default.
, Question 4
Netcom Solutions is an Internet Service Provider that has purchased a wholesale
bandwidth from network service provider GT&P. Netcom Solutions has been using
duplex technologies running through copper wires for its distribution. It now wants
to upgrade to multiplexing technologies using fiber-optic cables so that it can allow
multiple signals to travel simultaneously. Analyze which one of the following types of
multiplexing technologies Netcom should choose in this situation for its connection
with GT&P so that it can operate with more channels.
a. WDM (Wavelength Division Multiplexing)
b. FDM (Frequency Division Multiplexing)
c. TDM (Time Division Multiplexing)
d. DWDM (Dense Wavelength Division Multiplexing)
Question 5
Which one of the following statements regarding twisted pair cable is FALSE?
a. CAT 5 (Category 5) – A twisted-pair cabling standard with a maximum supported
bandwidth of 100 Mbps and a maximum rated frequency of 100 MHZ.
b. The following diagram depicts a STP (Shielded Twisted Pair) cable.
c. STP and UTP (Unshielded Twisted Pair) can both transmit data at 10 Mbps, 100 Mbps,
1 Gbps, and 10 Gbps, depending on the grade of cabling and the transmission method
in use.
d. UTP is more noise resistant than STP.
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