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23 Cards in this Set
- Front
- Back
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Recognizes a special ink. Often used in banking.
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MICR (Magnetic Ink Character Recognition)
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The simplest scanning technology is mark sensing. A pencil mark is made in a predeterined grid.
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OMR (Optical Mark Recognition)
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This scanning system recognizes letters, numbers, and special characters.
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OCR (Optical Character Recognition)
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Name the three types of scanning systems that use optical recognition techonology.
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OMR, OCR, bar code
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Term for professionals with advanced degrees. (Engineers, IT techs, doctors, scientists)
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Knowledge Workers
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Professional IT service offering storage assessment, design, managment, and operations, along with online data storage and back up either offsite or on-site.
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Storage Service Provider (SSP)
There is an associated security risk with moving an organization's data offsite. Security and troubleshooting are important issues that an Admin will need to address with the division. |
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Interconnected microcomputer hard disk drives are replacing the mainframe disk pack for secondary storage. This combines 10 to more than 100 small hard dick drives into a single unit. Provides large capacities and high access speeds; data can be accessed in parallel (at the same time) over multiple channels from many disks. A special microcontroller coordinates the hard drives' microprocessors so it appears as a single logical drive to the computer sys. Provide a fault-tolerant environment since the redundant design offers multiple copies of data on several disks.
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Redundant Arrays of Independant Disks (RAID)
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Telecommunications processors are devices necessary for the communications function. Name the five types of processors.
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Modem: (POTS "plain old telephone service) Converts digital data codes into analog signals and vice versa. MOdulates --> DEModulated...what happens between 2 modems.
Front-end processor: Small, specialized computer that communicates with the main computer sys and manages all the routine telecomm. tasks. Multiplexer: Allows one comm. channel to carry data from multiple sources at the same time. Need one at sending and another multiplexer at receiving end like a modem. Bridge: Comm. processor that provides a connection between two similar networks. Gateway: Comm. processor needed to connect two dissimilar networks; translates so they can communicate. |
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An expansion card that connects the microcomputer to a network enabling the exchange of data between computers. The cables or wire transceivers of the microcom. must be connected to this:
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Network Interface Card (NIC)
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Name the three types of line channels
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Twisted wire, coaxial cable, fiber optics
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Name three types of wireless transmission for telecommunication channels:
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Microwave, Satellite, Radio technologies
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Line channels that are continuous; the line needs to be strung and maintained for reliable data transmission are called:
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Tethered lines
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A telephone line is also known as:
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POTS (Plain old telephone service) - Made of twisted wire
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Name the advantages & disadvantages of twisted wire telecomm. channels.
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Advantages:
Inexpensive Easy to install Disadvantages: Slow; low bandwidth Subject to transmission interference/errors Low security; very easy to tap |
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Name the advantages & disadvantages of coaxial cable telecomm. channels:
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Advantages compared to twisted wire:
Higher bandwidth Less susceptible to interference Disadvantages: Somewhat difficult to install; inflexible Medium security; easy to tap |
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Name the advantages & disadvantages of Fiber Optic Cable telecomm. channels:
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Advantages:
Very high bandwidth High transmission accuracy Very good security Difficult to tap Disadvantages: Difficult to install |
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Name the advantages & disadvantages of Microwave telecomm. channels:
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Advantages:
High bandwidth Lower cost than tethered cable Disadvantages Need unobstructed line of transmission Susceptible to interference from environment |
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Name the advantages & disadvantages of Satellite telecomm. channels:
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Advantages:
High bandwidth Serves large area Disadvantages: Need unobstructed line of transmission Encryption required for security Transmission time delay |
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Name the advantages & disadvantages of Wireless Networks as telecomm. channels:
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Advantages:
Easy to install Disadvantages: Short-distance transmission Transmission interference Low security; very easy to tap |
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Name the advantages & disadvantages of Cellular Radio and Mobile Computing telecomm. channels:
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Advantages:
Convenience Disadvantages: Service range Medium security; easy to tap |
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Some long distance telephone connections link business telephones in two locations. Companies pay a fixed monthly charge for the use of a leased line. These private lines are called:
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Tie Lines
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A dedicated service line that consists of 24 individual channels, each supporting 64k bits per second (bps). Each 64k bit channel can be configured to carry analog (voice) or digital (data) traffic. Businesses and ISPs lease or purchase these lines from telephone companies for dedicated comm. service for connecting to the internet.
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T-1 line, also known as DS1 (Dedicated Service Lines)
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A dedicated service line that consists of 672 indiv. channels, each supporting 64k bits per second (bps) and configured to carry voice or data traffic. Mainly used for ISPs connecting to the Internet backbone.
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T-3 lines are sometimes referred to as DS3 lines.
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