Term
| Networks employ two types of signaling methods: ___ transmissions and ___ transmission. |
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Definition
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Term
___ transmissions use digital signaling
over a single wire. |
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Definition
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Term
| Communication on ___ transmissions is bidirectional, allowing signals to be sent and received, but not at the same time. |
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Definition
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Term
| To send multiple signals on a single cable, baseband uses ___ ___ ___. |
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Definition
| Time Division Multiplexing (TDM) |
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Term
| Time Division Multiplexing (TDM) divides a single ___ into time slots. |
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Definition
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Term
True or False?
TDM doesn’t change how baseband transmission works, only how data is placed on the cable. |
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Definition
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Term
| Most networks use ___ transmissions. Examples are 10GBaseT and 10GBaseLR. |
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Definition
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Term
| By LAN network standards, ___ transmissions use analog transmissions. |
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Definition
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Term
| For ___ transmissions to be sent and received, the medium must be split into two channels. (Alternatively, two cables can be used: one to send and one to receive transmissions.) |
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Definition
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Term
| Broadband transmissions create multiple channels using ___ ___ ___. |
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Definition
| Frequency Division Multiplexing (FDM) |
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Term
| ___ ___ ___ allows broadband media to accommodate traffic going in different directions on a single medium at the same time. |
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Definition
| Frequency Division Multiplexing (FDM) |
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Term
| Data can be transmitted over electric power lines via ___ ___ ___ ___. |
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Definition
| Broadband over Power Lines (BPL) |
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Term
| Broadband over Power Lines (BPL) is traditionally limited to the premises (such as a home network) because a ___ prevents the signal from being useful after the data passes through. |
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Definition
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Term
| The HomePlug Powerline Alliance provides specifications for ___ ___ ___ ___ implementations. |
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Definition
| Broadband over Power Lines (BPL) |
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Term
| Simplex, half duplex, and full duplex are referred to as ___ modes. |
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Definition
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Term
| Dialog modes determine the ___ in which data can flow through the network media. |
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Definition
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Term
| ___ mode enables one-way communication of data through the network, with the full bandwidth of the cable used for the transmitting signal. |
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Definition
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Term
| One-way communication is of little use on LANs, so ___ mode is rare for network implementations. |
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Definition
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Term
| ___-___ mode accommodates transmitting and receiving on the network, but not at the same time. |
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Definition
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Term
Devices configured for ___-___ mode can
simultaneously transmit and receive. This means that 100Mbps network cards theoretically can transmit at 200Mbps using this mode. |
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Definition
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Term
| The preferred dialog mode for network communication is ___-___ mode. |
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Definition
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Term
| Network cabling is commonly called ___. |
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Definition
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Term
| Two types of media interference can adversely affect data transmissions over network media: ___ interference and ___. |
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Definition
electromagnetic interference (EMI)
crosstalk |
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Term
| ___ interference is a problem when cables are installed near electrical devices, such as air conditioners or fluorescent light fixtures. |
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Definition
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Term
| ___ ___ ___ cable is susceptible to EMI, but ___ cable is not. |
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Definition
unshielded twisted-pair (UTP)
fiber |
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Term
| ___ refers to how the data signals on two separate media interfere with each other. |
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Definition
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Term
| Fiber-optic uses optical signals, not electrical, giving it a greater resistance to ___ and ___. |
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Definition
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Term
| ___ refers to the weakening of data signals as they travel through a medium. |
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Definition
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Term
| ___-___ cable does not suffer from attenuation. |
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Definition
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Term
| Fiber-optic cable exhibits ___ ___, a weakening of the signal as it travels through the cable. |
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Definition
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Term
| Most attenuation-related or chromatic dispersion-related difficulties on a network require using a ___ ___ to detect. |
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Definition
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Term
| The transmission rate of media is often incorrectly called the ___, which is actually the width of the range of electrical frequencies or the number of channels that the medium can support. |
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Definition
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Term
| Transmission rates normally are measured by the number of ___ ___ that can traverse the medium in a single second. |
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Definition
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Term
| In networks using cable-based media, there are three basic choices: ___ ___, ___ and ___-___. |
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Definition
| twisted pair, coaxial and fiber-optic |
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Term
| Twisted-pair and coaxial cables both use ___ wire to conduct the signals. |
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Definition
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Term
| Fiber-optic cable uses a ___ or ___ conductor and transmits the signals as light. |
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Definition
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Term
| Today, ___ ___ has proven to be the cable medium of choice. |
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Definition
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Term
| Because of its cost, ___-___ cable has been primarily restricted to use as a network backbone where segment length and higher speeds are needed. |
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Definition
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Term
| Fiber-optic cable is increasingly common in ___ room environments as a server-to-switch connection method, and in building-to-building connections in ___ ___ ___s. |
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Definition
server
metropolitan area networks (MANs) |
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Term
| ___ Twisted Pair is much more common than ___ Twisted Pair and is used for most networks. |
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Definition
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Term
| Shielded twisted pair is used where greater resistance to ___ and ___ is required. |
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Definition
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Term
| Category __ twisted pair cable can transmit data up to 10Mbps with a possible bandwidth of 16MHz. |
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Definition
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Term
| Category __ twisted pair cable has potential data throughput of 16Mbps. Often implemented in the IBM Token-Ring Network, this cable is no longer used. |
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Definition
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Term
| Category __ twisted pair cable was used with Fast Ethernet operating at 100Mbps with a transmission range of 100 meters. |
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Definition
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Term
| The IEEE 802.11__ standard specifies 1000Mbps over Category 5 cable. |
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Definition
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Term
| Category __ is a high-performance UTP cable that can transmit data up to 10Gbps. |
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Definition
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Term
| Category 6 cable typically is made up of __ twisted pairs of copper wire. |
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Definition
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Term
| Category 6 UTP uses a ___ ___, which separates each of the four pairs of wires. |
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Definition
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Term
| A longitudinal separator reduces the amount of ___ in the cable and makes the faster ___ rates possible. |
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Definition
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Term
| Category 6a, also called ___ 6, offers improvements over Category 6 by offering a minimum of 500MHz of bandwidth. |
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Definition
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Term
| Coaxial cable has a ___ core and insulation made of ___. |
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Definition
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Term
True or False?
Fiber-optic is the most secure of all cable media. |
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Definition
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Term
True or False?
Fiber is compatible with most electronic network equipment. |
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Definition
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Term
| ___-___ fiber uses a single direct beam of light, which allows for greater distances and increased transfer speeds. |
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Definition
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Term
| ___ fiber allows multiple beams of light to travel through the cable. This weakens the signal, reducing the length and speed at which the data signal can travel. |
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Definition
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Term
| ___ cables are coated with a nonflammable material, and they do not give off toxic fumes if they catch fire. |
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Definition
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Term
| ___ connectors are associated with coaxial media and 10Base2 networks. |
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Definition
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Term
| ___ connectors are small plastic connectors used on telephone cables. They have capacity for six small pins but in many cases not all the pins are used. |
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Definition
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Term
| ___ connectors are used with twisted-pair cabling and support up to 8 pins. |
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Definition
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Term
| ___-___ connectors are screw-on connections used to attach coaxial cable to devices. This includes RG-59 and RG-6 cables. |
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Definition
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Term
| RS-232 (Recommended Standard 232) is a standard for ___ connections that use a 25-pin DB-25 connector or a nine-pin DB-9 connector. |
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Definition
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Term
| The RS-232 standard specifies serial cable distances up to __ feet and a transfer speed up to 20kbps. |
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Definition
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Term
True or False?
Serial cables can be either shielded or unshielded. |
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Definition
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Term
| A ___ ___ is used to connect two dissimilar types of network media. |
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Definition
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Term
| 568A and 568B are telecommunications standards that specify pin arrangements for the ___ connectors on UTP or STP cables. 568 refers to the order in which the wires within the Category 5 cable are terminated and attached to the connector. |
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Definition
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Term
| Two types of cables are used to connect devices to hubs and switches: ___ cables and ___-___ cables. In the first, two of the wires are crossed; in the second, all the wires run straight through. |
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Definition
crossover
straight-through |
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Term
| A ___ cable can be used to directly network two PCs without using a hub or switch. When this is done, the cable performs the function of the switch. |
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Definition
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Term
| To make a crossover ___ cable, one end is wired according to the 568A standard and the other to the 568B standard. |
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Definition
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Term
| A ___ crossover cable is used to connect two T1 CSU/DSU devices in a back-to-back configuration using RJ-45 connectors on both ends. |
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Definition
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Term
| The ___ cable is a Cisco proprietary cable used to connect a PC to a Cisco router. |
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Definition
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Term
| A ___ cable, also known as a plug, is used to test and isolate network problems. It uses UTP cable and RJ-45 connectors. |
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Definition
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Term
| The cable in a network can be divided into two distinct sections: ___ cabling and ___ (backbone) cabling. |
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Definition
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Term
| ___ cabling connects client systems to the network. |
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Definition
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Term
| ___ cabling runs between floors to connect different locations on the network. |
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Definition
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Term
| ___ or ___ cross-connect is where outside cables enter the building for distribution. This can include Internet and phone cabling. |
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Definition
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Term
| ___ cross-connect is where the vertical and horizontal connections meet. |
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Definition
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Term
| Typically used in larger networks, ___ cross-connect provides a cross-connection between the main and horizontal cross-connects. |
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Definition
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Term
| ___ cabling connects the telecommunications room to the end user. |
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Definition
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Term
| The ___ cross-connect includes all connecting hardware, such as patch panels and patch cords, and is the termination point for all network horizontal cables. |
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Definition
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Term
| ___ cabling runs within walls and ceilings and therefore is called permanent cable or structure cable. |
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Definition
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Term
| The length of cable running from the horizontal connects to the telecommunication outlet should not exceed __ meters. Patch cables should not exceed __ meters. This is due to the 100-meter distance limitation of most UTP cable. |
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Definition
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Term
___ cable can connect locations outside the local LAN that require high-speed connections, so it is often fiber-optic
cable or high-speed UTP cable. |
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Definition
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Term
| The ___ ___ provides a connection point between network equipment such as hubs and switches and the ports to which PCs are connected. |
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Definition
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Term
| A patch panel is a freestanding or wall-mounted unit with a number of ___ port connections on the front. |
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Definition
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Term
| The wires from a telephony or UTP cable are attached to the ___ block using a ___ tool. |
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Definition
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Term
| The ___ block is also known as an insulation displacement connector (IDC). |
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Definition
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Term
| A type __ punchdown block is an older design used to connect wiring for telephone systems and other low-speed network systems. |
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Definition
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Term
| A type __ punchdown block has 50 rows of IDC contacts to accommodate 25-pair twisted-pair cable. |
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Definition
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Term
| A type __ punchdown block is used to connect network cable to patch panels. |
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Definition
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Term
| A type __ punchdown block supports higher frequencies and less crosstalk, so it supports higher-speed networks and higher grade twisted-pair cable. |
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Definition
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Term
| There are two types of wiring closets: ___ Distribution Frame and ___ Distribution Frame. |
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Definition
Main Distribution Frame (MDF)
Intermediate Distribution Frame (IDF) |
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Term
| One of the key components in the ___ ___ ___ wiring closet is a primary patch panel. The network connector jacks attached to this patch panel lead out to the building for network connections. |
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Definition
| Main Distribution Frame (MDF) |
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Term
| When multiple wiring closets are used, the MDF connects to IDFs via a ___ cable. This cable may be UTP, fiber, or coaxial. UTP Gigabit Ethernet or high-speed fiber are the preferred media. |
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Definition
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Term
| The hardware at the demarcation point is a smart jack known as the ___ ___ ___. |
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Definition
| Network Interface Device (NID) |
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Term
The ___ feature of the smart jack is used for testing purposes. It enables remote testing so technicians
do not always need to visit the local network to isolate problems. |
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Definition
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Term
| The ___ ___ feature of the smart jack is similar to the function of repeaters in an Ethernet network. |
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Definition
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Term
| The ___ ___ feature of the smart jack protects the system from environmental damage. |
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Definition
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Term
The ___ ___ feature of the smart jack
provides an alert if something goes wrong with the smart jack and therefore the connections at the demarcation point. |
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Definition
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Term
| A ___ Service Unit/___ Service Unit acts as a translator between the LAN data format and the WAN data format. |
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Definition
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Term
| Some consider a ___ a type of digital modem, but unlike a normal modem which changes the signal from digital to analog, this device changes the signal from one digital format to another. |
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Definition
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Term
| After a segment of network cable has been placed, the final task is wiring ___. |
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Definition
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Term
| ___ is the process to connect the network cable to the wall jack, plug, or patch panel. |
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Definition
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Term
| Termination can be verified by checking the LED on the ___ card or by ___ing other devices on the network. |
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Definition
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