Term
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Definition
| Network Cabling that interconnects telecommunications closets (IDFs) and equpiment rooms (MDFs). This cabling (also called vertical cabling) runs between floors and wings of a building and between buildings to carry network traffic destined for devices outside the work area. It's often fiber-optic but could be UTP. |
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Term
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Definition
| The connection of all cables and connectors tying a network together. |
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Term
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Definition
| A length of cable between two network devices, such as a NIC and a switch. Any intermediate passive (unpowered) devices are considered part of the total segment length. |
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Term
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Definition
| A type of patch cable that uses the 586B standard on one end and the 586A standard on the other end. This arrangement crosses the transmit and receive wires so that transmit on one end connects to receive on the other end. Often used to connect two devices of the same type to one another - eg. switch to switch |
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Term
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Definition
| Interference one wire generates on another wire when both wires are in a bundle. |
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Term
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Definition
| A grade of cable suitable for data networking. |
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Term
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Definition
| The location in the cable plant where a connection to a WAN is made and where an organization's LAN equipment ends and a third party provider's equipment cabling begins. |
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Term
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Definition
| A method for transmitting data in which two wires of opposite polarity are used. One wire transmits using positive voltage and the other uses negative. Differential signals enhance reliability by providing a canceling affect on EMI and crosstalk. |
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Term
| Electromagnetic Intereference (EMI) |
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Definition
| A disturbance to the operation of an electronic circuit or it's data, caused by devices, caused by devices that emit an electromagnetic field. |
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Term
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Definition
| The method used to represent bits on a medium |
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Term
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Definition
| The location of cabling and equipment that connects an organization's network to a third party telecommunications provider. It can also serve as an equipment room and the main cross-connect for all backbone cabling. |
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Term
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Definition
| A room that houses servers, routers, switches and other major network equipment and serves as a connection point for backbone cabling running between telecommunications closets (IDFs). When it's used to connect backbone cabling between buildings and IDFs, it's called a 'main distribution frame'. |
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Term
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Definition
| A LAN that's expanded beyond it's normal distance limitations with wireless communication. |
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Term
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Definition
| A cable type that carries data over thin strands of glass by using optical (light) pulses to represent bits. |
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Term
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Definition
| A unit expressing how many times per second a signal or electromagnetic wave occurs. |
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Term
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Definition
| The network cabling running from the work area's wall jack to the telecommunications closet (IDF), usually terminated at a patch panel. The total maximum distance for horizontal wiring is 100 meters. |
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Term
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Definition
| A very longth wavelength light source in the invisible spectrum that can be used to transmit data wirelessly. |
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Term
| Intermediate Distribution Frame (IDF) |
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Definition
| A telecommunications closet that houses the cabling and devices for work area computers. |
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Term
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Definition
| Devices that use infrared signals to communicate. IrDA stands for Infrared Device Association. |
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Term
| Main Distribution Frame (MDF) |
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Definition
| An equipment and cabling room that serves as the connecting point for backbone cabling between buildings and between IDFs; also called the 'main cross connect'. |
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Term
| MDI Crossed (MDI-X) Devices |
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Definition
| Network devices that connect bu using RJ-45plugs over twisted pair cabling; they transmit over 3 and 6 and receive over 1 and 2 of an RJ-45 connector. |
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Term
| Medium dependent interface (MDI) devices |
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Definition
| Network devices that connect by using RJ-45 plugs over twisted pair cabling; they transmit on pins 1 and 2 and receive on pins 3 and 6 of an RJ-45 connector. |
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Term
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Definition
Low-powered, two-way radio communication systems, such as those used
in taxis, police radios, and other private radio systems. Also called “single-frequency radio.” |
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Term
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Definition
A short cable for connecting a computer to an RJ-45 jack or connecting a
patch-panel port to a switch or hub. See also straight-through cable. |
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Term
| Radio Frequency Interference (RFI) |
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Definition
Similar to EMI, but RFI is usually interference caused by
strong broadcast sources. See also electromagnetic interference (EMI). |
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Term
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Definition
A device used in the work area in wall plates and surface-mounted boxes to plug
a patch cable that connects a computer to the horizontal wiring. |
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Term
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Definition
A connector used to terminate twisted-pair cable for making patch cables. It has
eight wire traces to accommodate a standard twisted-pair cable with four wire pairs. |
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Term
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Definition
A radio communication system that uses multiple frequencies
simultaneously, thereby improving reliability and reducing susceptibility to interference over
narrowband radio. |
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Term
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Definition
A standard patch cable that uses the same wiring standards on both
ends so that each wire is in the same location on both ends of the cable (pin 1 goes to pin 1,
pin 2 to pin 2, and so forth). See also patch cable. |
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Term
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Definition
A specification for organizing cabling in data and voice networks,
regardless of the media type or network architecture. |
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Term
| Telecommunications Closet (TC) |
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Definition
Usually an enclosed space or room that provides
connectivity to computer equipment in the nearby work area; can also serve as the entrance
facility in small installations. Typical equipment includes patch panels to terminate
horizontal wiring runs, hubs, and switches. |
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Term
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Definition
The attachment of RJ-45 plugs on a cable to make a patch cable or punching
down the cable wires into terminal blocks on a jack or patch panel. |
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Term
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Definition
A device that transmits and receives. In wireless networking, an access point is
a transceiver. |
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Term
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Definition
A cable containing one or more pairs of insulated strands of copper
wire twisted around one another and housed in an outer sheath. |
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Term
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Definition
A grade of cable that’s not suitable for data networking but is suitable for voice
communication. |
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Term
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Definition
| The location of workstations and other user devices, in short, the place where people work with computers and other network devices. |
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Term
Which of the following is a common characteristic of a network medium? (Choose all that apply)
A. Bandwidth rating
B. Interference Susceptibility
C. Broadband Rating
D. Maximum Segment Length |
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Definition
A. Bandwidth rating
B. Interference Susceptibility
D. Maximum Segment Length |
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Term
Which of the following types of fiber-optic connectors provides high density and requires only one connector for tow cables?
A. SC
B. ST
C. MT-RJ
D. RJ-45 |
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Definition
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Term
Which of the following conditions requires cables not to exceed a recommended maximum length?
A. Diminution
B. Capacitance
C. Bandwidth
D. Attenuation |
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Definition
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Term
Which of the following is the process for representing bit signals on the medium?
A. Encryption
B. Encoding
C. Decryption
D. Decoding |
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Definition
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Term
What happens to signals as they travel the length of the medium?
A. They decode
B. They amplify
C. They attenuate
D. They implode |
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Definition
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Term
Which of the following is UTP susceptible to? (Choose all that apply)
A. EMI
B. Crosstalk
C. Signal Enhancement
D. LEDs |
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Definition
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Term
The space between a false ceiling and the true ceiling where heating and cooling air circulates is called the?
A. Duct-Equivalent airspace
B. Conduit
C. Return air
D. Plenum |
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Definition
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Term
What type of connector is used most commonly with TP network wiring?
A. RJ-11
B. RJ-45
C. BNC
D. MT-RJ |
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Definition
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Term
You have been hired to install a network at a large government agency that wants to reduce the likelihood of electronic eavesdropping on its network. What type of cable is most resistant to eavesdropping?
A. UTP
B. STP
C. Coaxial
D. Fiber Optic |
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Definition
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Term
Which of the following is a characteristic of unshielded twisted-pair cable? (Choose all that apply)
A. Consists of four wires
B. Commonly used in physical bus topologies
C. Has a distance limitation of 100 meters
D. Is susceptible to electrical interference. |
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Definition
C. Has a distance limitation of 100 meters
D. Is susceptible to electrical interference |
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Term
Which of the following is a characteristic of fiber-optic cabling? (Choose all that apply)
A. Can be used in electrically noisy environments
B. Requires only a single strand of fiber for network connections
C. Carries data over longer distances than UTP
D. Has low bandwidth |
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Definition
A. Can be used in electrically noisy environments
C. Carries data over longer distances than UTP |
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Term
You're preparing to install a conventional Ethernet network in your new office building, but your boss tells you to be ready to handle a switchover to 1 Gbps Ethernet next year. What types of cable could you install? (Choose all that apply)
A. Cat 5
B. Fiber Optic
C. Cat 4
D. Cat 6
E. Coax |
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Definition
A. Cat 5
B. Fiber Optic
D. Cat 6 |
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Term
When two cables run side by side, signals traveling down one wire might interfere with signals traveling on the other wire. What is this phenomenon called?
A. RFI
B. Attenuation
C. Impedence
D. Crosstalk |
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Definition
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Term
What characteristic of twisted-pair cabling helps mitigate the effects of crosstalk?
A. Differential signals
B. Copper Conductors
C. Four pairs of wires
D. 100-ohm impedance |
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Definition
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Term
Which of the following is a wiring standard for twisted-pair cable connections? (Choose all that apply)
a. IEEE 802.3a
b. TIA/EIA 568a
c. IEEE 802.3b
d. TIA/EIA 568b |
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Definition
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Term
Which of the following is a component of a structured cabling system? (Choose all that apply)
A. Patch cables
B. RJ-11 plugs
C. Coax cable
D. Horizontal Wiring |
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Definition
A. Patch cables
D. Horizontal Wiring |
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Term
Where are you most likely to find backbone cabling (Choose all that apply)
a. MDF
b. In the work area
c. Between IDF's
d. Connecting a work area to an IDF |
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Definition
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Term
Which of the following is a tool needed to make a patch cable? (Choose all that apply)
A. 110 Punchdown tool
B. Cable stripper
C. Crimping tool
D. RJ-45 Jack |
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Definition
B. Cable stripper
C. Crimping tool |
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Term
Which type of connection is most likely to require a crossover cable?
A. PC to Hub
B. Hub to Router
C. Router to Switch
D. PC to Router |
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Definition
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Term
Which UTP limitations can be solved by fiber-optic cable? (Choose all that apply)
A. Bandwidth
B. EMI susceptibility
C. Installation Cost
D. Segment Length |
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Definition
A. Bandwidth
B. EMI susceptibility
D. Segment length |
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Term
How many strands of fiber-optic cable are needed for a network connection?
A. 1
B. 2
C. 4
D. 8 |
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Definition
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Term
Which statement is true about fiber-optic cables?
A. MMF uses lasers and has a thicker core
B. SMF uses lasers and has a thinner core
C. MMF uses LEDs and has a thinner core
D. SMF uses LEDs and has a thicker core |
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Definition
| B. SMF uses lasers and has a thinner core |
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Term
Which if the following wireless technologies does a 802.11 wireless network unsing the 2.4 GHz range use?
A. Infrared
B. Narrowband Radio
C. Frequency Hopping
D. Direct-Sequence Spread Spectrum |
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Definition
| D. Direct Sequence Spread Spectrum |
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Term
When might you want to use a rollover cable?
a. To connect a PC to another PC
b. To connect a router to a switch
c. To add a switch to a LAN
d. To configure a cisco device |
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Definition
| d. To configure a cisco device |
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