CIS 260 TEST 3 QUESTIONS ANSWERED CORRECTLY LATEST UPDATE 2026
What is RFI? - Answers Radio frequency interference (RFI) is the disruption of electronic devices
caused by unwanted radio signals from natural or man-made sources.
What is EMI? - Answers Electromagnetic interference (EMI) is the disturbance in electronic devices
caused by electromagnetic energy from nearby equipment or environmental sources.
What is cross talk? - Answers a signal transmitted on one channel of a transmission system creates an
undesired effect in another circuit or channel
What is a power spike - Answers a temporary increase in voltage on a power line
What is a power sag - Answers a short drop in voltage (usually about 10%) below the main supply
level
What is a surge protector - Answers A small device that protects computers and other electronic
devices from damage by high-voltage power spikes
What is a UPS - Answers Uninterruptible Power Supply, a power supply that can feed a computer
power for a duration of time during a power outage
What is a UTP cable? - Answers Unshielded Twisted Pair
a twisted pair cable with no additional shielding under the jacket or around the individual wires, this is
the most common type of TP cable.
Where are TP and UTP cables typically found? - Answers Almost every network, small and large
utilizes these cables
What are the advantages and disadvantages of UTP cables - Answers Cheap, flexible, can be made
quickly
Susceptible to interference, limited range, Performance degradation
What are the advantages and disadvantages of TP cables - Answers Cheap, flexible, made quickly
More susceptible to interference than UTP, limited range, performance degradation
What are the advantages and disadvantages of fiber optic cables - Answers They are extremely fast
and can carry data over a large area without loss, immune to EMI
Cables are delicate and expensive to install, usually require compatible hardware
What is a packet sniffer - Answers software (or sometimes even hardware) that allows users to
capture packets being sent across a network and inspect the contents
What is 1000/100baseT? - Answers BaseT is a ethernet network standard
1000Base-T supports transmission speeds of up to 1000Mbps
100Base-T supports transmission speeds of up to 100Mbps
What is a domain? - Answers a collection of users, devices, hardware, and software all connected
either wirelessly or wired
What device connects computers together - Answers switches
What is a subnet - Answers A small segment of computers that is part of a larger network
What is a VLAN - Answers virtual subnets are segregated using switch ports, eliminating the need for
physical moves, adds and changes.
Straight Thru vs Crossover Cable - Answers Straight Thru cables have the same wire connections at
each end
Crossover cables do not have the same wire configuration at each end
What is the backbone of a network - Answers The central part that connects different segments or
subnetworks, allowing data to travel efficiently between them. A large cable segment that joins two
or more LANs across several buildings or possibly in the same
building
What is NAT - Answers Network Address Translation (NAT) allows the private IP addresses to be used
in a private network while still being able to communicate with the Internet.
What is RFI? - Answers Radio frequency interference (RFI) is the disruption of electronic devices
caused by unwanted radio signals from natural or man-made sources.
What is EMI? - Answers Electromagnetic interference (EMI) is the disturbance in electronic devices
caused by electromagnetic energy from nearby equipment or environmental sources.
What is cross talk? - Answers a signal transmitted on one channel of a transmission system creates an
undesired effect in another circuit or channel
What is a power spike - Answers a temporary increase in voltage on a power line
What is a power sag - Answers a short drop in voltage (usually about 10%) below the main supply
level
What is a surge protector - Answers A small device that protects computers and other electronic
devices from damage by high-voltage power spikes
What is a UPS - Answers Uninterruptible Power Supply, a power supply that can feed a computer
power for a duration of time during a power outage
What is a UTP cable? - Answers Unshielded Twisted Pair
a twisted pair cable with no additional shielding under the jacket or around the individual wires, this is
the most common type of TP cable.
Where are TP and UTP cables typically found? - Answers Almost every network, small and large
utilizes these cables
What are the advantages and disadvantages of UTP cables - Answers Cheap, flexible, can be made
quickly
Susceptible to interference, limited range, Performance degradation
What are the advantages and disadvantages of TP cables - Answers Cheap, flexible, made quickly
More susceptible to interference than UTP, limited range, performance degradation
What are the advantages and disadvantages of fiber optic cables - Answers They are extremely fast
and can carry data over a large area without loss, immune to EMI
Cables are delicate and expensive to install, usually require compatible hardware
What is a packet sniffer - Answers software (or sometimes even hardware) that allows users to
capture packets being sent across a network and inspect the contents
What is 1000/100baseT? - Answers BaseT is a ethernet network standard
1000Base-T supports transmission speeds of up to 1000Mbps
100Base-T supports transmission speeds of up to 100Mbps
What is a domain? - Answers a collection of users, devices, hardware, and software all connected
either wirelessly or wired
What device connects computers together - Answers switches
What is a subnet - Answers A small segment of computers that is part of a larger network
What is a VLAN - Answers virtual subnets are segregated using switch ports, eliminating the need for
physical moves, adds and changes.
Straight Thru vs Crossover Cable - Answers Straight Thru cables have the same wire connections at
each end
Crossover cables do not have the same wire configuration at each end
What is the backbone of a network - Answers The central part that connects different segments or
subnetworks, allowing data to travel efficiently between them. A large cable segment that joins two
or more LANs across several buildings or possibly in the same
building
What is NAT - Answers Network Address Translation (NAT) allows the private IP addresses to be used
in a private network while still being able to communicate with the Internet.
