Term
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Definition
| The strength of a n electrical signal is directly proportional to its __________. |
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Term
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Definition
| The distance between corresponding points on a wave's cycle is called its ________. |
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Term
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Definition
| the use of 1s and 0s to represent information is characteristic of a _______ system. |
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Term
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Definition
| Every pluse in a digital signal is a ____. |
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Term
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Definition
| A digital signal is composed of a pulse of positive voltage represents a __. |
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Term
| Convert Binary to Decimal |
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Definition
To convert a byte to a decimal number, determine the value represented by each bit, then add
those values together. If a bit in the byte is 1 (in other words, if it’s “on”), the bit’s numerical
equivalent in the coding scheme is added to the total. If a bit is 0, that position has no value
and nothing is added to the total. For example, the byte 11111111 equals: 1 × 27 + 1 × 26 +
1 × 25 + 1 × 24 + 1 × 23 + 1 × 22 + 1 × 21 + 1 × 20, or 128 + 64 + 32 + 16 + 8 + 4 + 2 + 1.
Its decimal equivalent, then, is 255. In another example, the byte 00100100 equals: 0 × 27 +
0 × 26 + 1 × 25 + 0 × 24 + 0 × 23 + 1 × 22 + 0 × 21 + 0 × 20, or 0 + 0 + 32 + 0 + 0 + 4 + 0 +
0. Its decimal equivalent, then, is 36. |
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Term
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Definition
| is a term used by networking professionals to describe the nondata information that must accompany data for a signal to be properly routed and interpreted by the network. |
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Term
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Definition
| can be used to make a signal conform to a specific pathway. |
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Term
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Definition
| In _________ transmission, signals may travel in both directions over a medium but in only one direction at a time. |
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Term
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Definition
| Technology used to modify analog signals to make them suitable for carrying data over a communication path is called ___________. |
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Term
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Definition
| When signals are free to travel in both directions over a medium simultaneously, the transmission is considered _________. |
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Term
| FDM (Frequency Division Multiplexing) |
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Definition
| Is a type of multiplexing that assigns a unique frequency band to each communications subchannel. Signals are modulated with different carrier frequencies, then multiplexed to simultaneously travel over a single channel. |
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Term
| WDM (Wavelength division multiplexing) |
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Definition
| is a technology used with fiber-optic cable, which enables one fiber-optic connection to carry multiple light signals simultaneously. |
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Term
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Definition
| Transmission involves one transmitter and multiple receivers. |
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Term
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Definition
| Transmission involves one transmitter and multiple, undefined receivers. |
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Term
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Definition
| Transmission issues signals to multiple, defined recipients. |
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Term
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Definition
| The data transmission characteristic most frequently discussed and analyzed networking professionals is ____________. |
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Term
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Definition
| In ____________ transmission signals are modulated as radio frequency (RF) analog waves that use different frequency ranges. |
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Term
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Definition
| Typically in ___________ transmission, digital signals are sent through direct current (DC) pulses applied to the wire. |
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Term
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Definition
| Ethernet is an example of a ________system found on many LAN's. |
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Term
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Definition
| One of the most common transmission flaws affecting signal is _______. |
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Term
| EMI (electromagnetic interference) |
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Definition
| is a common source of noise. |
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Term
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Definition
| Occurs when a signal traveling on one wire or cable infringes on the signal traveling over an adjacent wire or cable. |
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Term
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Definition
| The most significant factor in choosing a transmission method is it's __________. |
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Term
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Definition
| Part of a network that contain end nodes is a _____________. |
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Term
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Definition
| Part of a network that contain end nodes is a _____________. |
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Term
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Definition
| Part of the network that does not contain end nodes is an __________. |
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Term
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Definition
| The maximum distance a signal can travel and still be interpreted accurately is equal to a segment's ______________. |
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Term
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Definition
| Are the pieces of hardware that connect the wire to the network device. |
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Term
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Definition
| Cable consists of a central metal core (often copper) surrounded by an insulator, a braided metal shielding, called braiding or shield, and an outer cover, called the sheath or jacket. |
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Term
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Definition
| cable consists of color coded pairs of insulated copper wires, each with diameter of 0.4 to 0.8mm (approximately the diameter of a straight pin). Every two wires are twisted around each other to form pairs, and all the pairs are encased in a plastic sheath. |
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Term
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Definition
| The more twists per foot in a pair of wires, the more resistant the pair will be to ________________ |
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Term
| UTP (untwisted shielded pair) |
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Definition
| Cabling consists of one or more insulated wire pairs encased in a plastic sheath. |
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Term
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Definition
| Modern LANs use ____ or higher wiring. |
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Term
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Definition
| Cable contains one or several glass or plastic fibers at its center, or core. Surrounding the fibers is a layer o glass or plastic called cladding. Outside the cladding, a plastic buffer protects the cladding and core. Strands of Kevlar covered with a plastic sheath surrounding the plastic buffer. |
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Term
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Definition
| Serial refers to a style of data transmission in which the pulses that represent bits follow one another along a _______ line |
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Term
| EIA/TIA RS-232 (recommended standard 232) |
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Definition
| describes a popular serial data transmission method. |
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Term
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Definition
| The _______ connector is used in RS-232 transmissions. |
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Term
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Definition
| In a ______ cable, the usual wire positions are exactly reversed in one of the two RJ-45 terminations. |
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Term
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Definition
| The term ________ describes the hardware that makes up the enterprise-wide cabling system. |
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Term
| TIA/EIA Commercial Building Wiring Standard |
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Definition
| is also known as structured cabling. |
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Term
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Definition
| The points where circuits interconnect with the other circuits is known as ________ |
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Term
| Telecommunications Closet |
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Definition
| The term _______________ identifies a room containing connectivity for groups of workstations in its area. |
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Term
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Definition
| Describes wiring that connects workstations to the telecommunications closet. |
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Term
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Definition
| Many network problems can be traced to poor cable _________ techniques. |
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