ITSS 4370 FINAL EXAM QUESTIONS AND ANSWERS
Cat 5e - CORRECT ANSWER✅✅§ e(nhanced) cables are identical in construction to Cat5 but are built
under strict standards to reduce crosstalk issues.
§ Most common used.
Cat 6 - CORRECT ANSWER✅✅-cables are wound tighter and are often outfitted with foil or braided
shielding. This shielding protects the twisted pairs, helping to prevent crosstalk and noise interference.
-can technically support speeds up to 10 Gbps, but can only do so for distances of up to 55 meters
Cat 6a - CORRECT ANSWER✅✅-a(ugmented) cables support twice the maximum bandwidth and are
capable of higher transmission speeds over longer cable lengths.
-are always shielded.
Cat 7 - CORRECT ANSWER✅✅§ cables support higher bandwidth and significantly faster transmission
speeds. cables can transmit up to 100 Gbps at a range of 15 meters.
§ cables are always shielded, and use a modified GigaGate45 connector, which is backwards compatible
with regular Ethernet ports.
Fiber Optic Cable - CORRECT ANSWER✅✅o are comprised of 1 to 144 fibers; fibers are made of coated
glass.
o have cladding glass that allows light to bounce off the wall or the fiber and continue to travel along its
path.
o Fibers are also jacketed to protect against mechanical and environmental damage.
o Loose tube (telco) fiber optic cables include a metallic strength member to prevent damage to the
glass fibers when pulling, and both a fiber jelly and a core water-blocking grease.
Single Mode - CORRECT ANSWER✅✅Uses a thin 9-micrometer core fiber surrounded by a 116-
micromenter glass cladding (125 micrometers overall) that supports one transmission mode, or one
color of light.
, Multi-Mode - CORRECT ANSWER✅✅Uses a thicker 50- to 62.5-micrometer core fiber surrounded by
75- or 62.5-micrometer glass cladding (125 micrometers overall) that supports multiple mode colors of
light.
Repeaters & Regenerators - CORRECT ANSWER✅✅o Transmission of a data stream over copper or
optical media results in degradation of the signal over distance with the introduction of noise.
o To extend the distance a signal can be transmitted, it can be 1) reamplified, 2) reshaped, and 3)
retimed.
Repeaters - CORRECT ANSWER✅✅OR extenders are used to overcome distance limitations of copper
and optical transmission media and simply reamplify the signal. Such a repeater is sometimes called a 1R
repeater
Regenerators - CORRECT ANSWER✅✅o are used to overcome distance limitations of copper and optical
transmission media but reamplifying, reshaping and retiming the signal. This is called a 3R regenerator.
Network Interface Unit (NIU) - CORRECT ANSWER✅✅o serves as the point of demarcation between the
carrier network and the customer's network.
o Sometimes called a network interface device (NID).
Contains a test jack for a technician to plug in a lineman's handset, test set, or a "butt set."Also contains
surge protection.
Network Interface Card (NIC) - CORRECT ANSWER✅✅o ), or network interface controller, is a hardware
component, either a separate card that plugs into the expansion slot on a device, or as a chipset
soldered directly to a motherboard, that allows a device to communicate over a network.
o may be wired (Ethernet) or wireless (Wi-Fi).
o Technically, is both a layer 1 and layer 2 device as it's responsible for transmitting and receiving layer 1
data and is also reachable via layer 2 switching.
o The NIC's ROM stores the factory-assigned medium access control (MAC) address, a 48-bit address
unique from all others, which switches use to send data to a device within a network.
o Modern NICs are designed to operate according to IEEE 802.3 for Ethernet and IEEE 802.11 for Wi-Fi.
Cat 5e - CORRECT ANSWER✅✅§ e(nhanced) cables are identical in construction to Cat5 but are built
under strict standards to reduce crosstalk issues.
§ Most common used.
Cat 6 - CORRECT ANSWER✅✅-cables are wound tighter and are often outfitted with foil or braided
shielding. This shielding protects the twisted pairs, helping to prevent crosstalk and noise interference.
-can technically support speeds up to 10 Gbps, but can only do so for distances of up to 55 meters
Cat 6a - CORRECT ANSWER✅✅-a(ugmented) cables support twice the maximum bandwidth and are
capable of higher transmission speeds over longer cable lengths.
-are always shielded.
Cat 7 - CORRECT ANSWER✅✅§ cables support higher bandwidth and significantly faster transmission
speeds. cables can transmit up to 100 Gbps at a range of 15 meters.
§ cables are always shielded, and use a modified GigaGate45 connector, which is backwards compatible
with regular Ethernet ports.
Fiber Optic Cable - CORRECT ANSWER✅✅o are comprised of 1 to 144 fibers; fibers are made of coated
glass.
o have cladding glass that allows light to bounce off the wall or the fiber and continue to travel along its
path.
o Fibers are also jacketed to protect against mechanical and environmental damage.
o Loose tube (telco) fiber optic cables include a metallic strength member to prevent damage to the
glass fibers when pulling, and both a fiber jelly and a core water-blocking grease.
Single Mode - CORRECT ANSWER✅✅Uses a thin 9-micrometer core fiber surrounded by a 116-
micromenter glass cladding (125 micrometers overall) that supports one transmission mode, or one
color of light.
, Multi-Mode - CORRECT ANSWER✅✅Uses a thicker 50- to 62.5-micrometer core fiber surrounded by
75- or 62.5-micrometer glass cladding (125 micrometers overall) that supports multiple mode colors of
light.
Repeaters & Regenerators - CORRECT ANSWER✅✅o Transmission of a data stream over copper or
optical media results in degradation of the signal over distance with the introduction of noise.
o To extend the distance a signal can be transmitted, it can be 1) reamplified, 2) reshaped, and 3)
retimed.
Repeaters - CORRECT ANSWER✅✅OR extenders are used to overcome distance limitations of copper
and optical transmission media and simply reamplify the signal. Such a repeater is sometimes called a 1R
repeater
Regenerators - CORRECT ANSWER✅✅o are used to overcome distance limitations of copper and optical
transmission media but reamplifying, reshaping and retiming the signal. This is called a 3R regenerator.
Network Interface Unit (NIU) - CORRECT ANSWER✅✅o serves as the point of demarcation between the
carrier network and the customer's network.
o Sometimes called a network interface device (NID).
Contains a test jack for a technician to plug in a lineman's handset, test set, or a "butt set."Also contains
surge protection.
Network Interface Card (NIC) - CORRECT ANSWER✅✅o ), or network interface controller, is a hardware
component, either a separate card that plugs into the expansion slot on a device, or as a chipset
soldered directly to a motherboard, that allows a device to communicate over a network.
o may be wired (Ethernet) or wireless (Wi-Fi).
o Technically, is both a layer 1 and layer 2 device as it's responsible for transmitting and receiving layer 1
data and is also reachable via layer 2 switching.
o The NIC's ROM stores the factory-assigned medium access control (MAC) address, a 48-bit address
unique from all others, which switches use to send data to a device within a network.
o Modern NICs are designed to operate according to IEEE 802.3 for Ethernet and IEEE 802.11 for Wi-Fi.
