Term
Which Ethernet standard is known as "Fast Ethernet", even though there are now much faster versions today? (pg. 92)
A. 10BASE-T
B. 100BASE-T
C. 100BASE-FX
D. 100BASE-SX |
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Definition
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Term
| What is the maximum speed, distance between node and hub/switch, and minimum cable type of 100BASE-T? (pg. 92) |
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Definition
| 100 Mbps, 100 meters between switch/hub and node, and Cat 5 or higher |
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Term
True or False:
Ethernet networks are baseband, meaning that only a single signal travels over the wires of the network at a given time. (pg. 92) |
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Definition
True.
Television and cable Internet are broadband. |
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Term
| What are three disadvantages of using unshielded twisted pair (UTP) cabling compared to fiber cabling? (pg. 94) |
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Definition
- Distance limitation (100-meter distance vs. two kilometers)
- Electromagnetic interference (EMI) - UTP lacks electrical shielding
- Security - UTP and copper cabling are easy to tap into
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Term
A short-distance, LED-based alternative to 100BASE-FX that was backwardly compatible with 10BASE-FL. (pg. 95)
A. 1000BASE-T
B. 100BASE-TX
C. 1000BASE-LX
D. 100BASE-SX |
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Definition
D. 100BASE-SX. Think of the "S" as "short" (and the "L" in 1000BASE-LX as "long").
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Term
Feature that allows a NIC to send and receive data at the same time (pg. 95)
A. Multimode
B. Carrier-sense
C. Full-duplex
D. Collision detection |
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Definition
C. Full-duplex
Multimode is a type of fiber optic cable.
Carrier-sense is a MAC protocol that allows devices to listen to a shared transmission medium before transmitting data.
Collision detection is an algorithm in game development, not networking. |
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Term
True or false:
Full-duplex doubles network bandwidth, but doesn't increase network speed directly (pg. 96) |
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Definition
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Term
Also known as 1000BASE-T, the most common type of Ethernet found on new NICs. (pg. 97)
A. Ultrafast Ethernet
B. Superfast Ethernet
C. Gigabit Ethernet
D. Fast Ethernet |
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Definition
C. Gigabit Ethernet. The first part of the name, 1000, indicates it's maximum speed (one thousand megabits per second).
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Term
The distance a signal has to travel before it completes its particular shape and starts to repeat. (pg. 97)
A.Wavelength
B. Bandwidth
C. Hertz
D. Frequency |
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Definition
A. Wavelength
Bandwidth isn't a measure of distance, but amount and speed.
Hertz is a unit of frequency, which itself is the number of occurrences of a repeating event per unit of time. |
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Term
The long distance carrier for Gigabit Ethernet that uses lasers on single mode cables to shoot data at distances up to 5 kilometers. (pg. 98)
A. 100BASE-T
B. 100BASE-X
C. 100BASE-SX
D. 100BASE-LX |
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Definition
D. 100BASE-LX. Think of the L as "long" and "lasers".
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Term
Fiber connector considered to be the predominant fiber connector and is very popular, particular in the U.S. (pg. 98)
A. MT-RJ
B. LC
C. ST
D. SC |
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Definition
| B. The LC, or local connector |
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Term
A removable module that enables connectivity between a device and a cable. (pg. 100)
A. Transceiver
B. Optic
C. Reader
D. Receiver |
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Definition
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Term
A ___ enables connection between two different types of network, such as copper and optical fiber. (pg. 100)
A. Switch
B. Modem
C. Media Converter
D. De-Interlacer |
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Definition
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Term
The 10 Gigabit Ethernet (10Gbe) standards are defined by several factors. Which of these is NOT one? (pg. 101)
A. The type of fiber used
B. The wavelength of the laser or lasers
C. The Physical layer signaling type
D. The maximum bandwidth that the network can handle |
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Definition
D. The maximum bandwidth that the network can handle |
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Term
| True or false: A bi-directional receiver can't work with duplex receivers on a fiber-optic network. (pg. 101) |
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Definition
| True: A corresponding BiDi transceiver must be installed on the other end of the fiber for it to work. |
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Term
With 100BASE-T, what is the maximum distance between the switch and the node? (pg. 92)
A. 1000 meters
B. 400 meters
C. 100 meters
D. 150 meters |
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Definition
C. 100 meters, even though the "100" in the name represents the maximum transmission speed, not maximum distance.
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Term
What type of cable and connector does 100BASE-FX use? (pg. 94)
A. Multimode fiber with ST or SC connectors
B. STP Cat 6 with RJ-45 connectors
C. Single-mode fiber with MT-RJ connectors
D. UTP Cat 5e with RJ-45 connectors |
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Definition
A. 100BASE-FX uses multimode fiber with either ST or SC connectors |
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Term
Which of the following connectors would you typically find with a 40 GbE installation? (pg. 106)
A. LC
B. SFP
C. QSFP+
D. XSFP+ |
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Definition
C. 40 Gbe installations over fiber typically use QSFP+ (enhanced quad small form factor pluggable) connectors |
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Term
What standard does IEEE 802.3ab describe? (pg. 97)
A. 1000BASE-LX
B. 1000BASE-T
C. 1000BASE-X
D. 1000BASE-SX |
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Definition
B. 1000BASE-T, also known as Gigabit Ethernet.
1000-BASE-X, 1000BASE-LX and 1000BASE-SX are all IEEE 802.3z standards. |
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Term
What is the big physical difference between 1000BASE-SX and 100BASE-FX? (pg. 94-95)
A. -SX commonly uses the LC connector, whereas -FX frequently uses the SC connector.
B. -SX is single-mode, whereas -FX is multimode.
C. -SX uses the ST connector exclusively.
D. There is no difference
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Definition
A. While they look similar, 1000BASE-SX uses the LC connector, while 100BASE-FX frequently uses the SC connector.
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Term
What is the maximum distance for 1000BASE-LX without repeaters?
A. 1 mile
B. 2500 meters
C. 20,000 feet
D. 5000 meters |
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Definition
| D. 5000 meters, or 5 kilometers |
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Term
What is a big advantage to using fiber-optic cable?
A. Fiber is common glass; therefore, it's less expensive.
B. Fiber is not effected by EMI.
C. Making custom cable lengths is easier with fiber.
D. All that orange fiber looks impressive in the network closet. |
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Definition
B. Fiber is not effected by EMI because it uses glass and light |
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Term
How many wire pairs does 1000BASE-T use?
A. 1
B. 2
C. 3
D. 4 |
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Definition
D. 1000BASE-T uses all four pairs of wires |
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Term
What is the standard connector for the 10 GbE fiber standard?
A. ST
B. SC
C. MT-RJ
D. There is no standard |
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Definition
D. No standard; the 10GbE has left it up to manufacturers |
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Term
What is the maximum cable length of 10GBASE-T on Cat 6?
A. 55 meters
B. 100 meters
C. 20 meters
D. 70 meters |
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Definition
A. With Cat 6 cable, 10GBASE-T is limited to 55 meters |
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