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22 Cards in this Set
- Front
- Back
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Active Directory (AD) |
The centralized directory database that contains user account information and security for the entire group of computers on a network. |
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Active Directory Domain Services (AD DS) |
The Active Directory service that manages the process that allows a user to sign on to a network from any computer on the network and get access to the resources that Active Directory allows. |
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API (application programming interface) call |
The process an application uses to make a request of the OS. |
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Application layer |
The seventh layer of the OSI model. Application layer protocols enable software programs to negotiate formatting, procedural, security, synchronization, and other requirements with the network. |
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ARP (Address Resolution Protocol) |
A core protocol in the TCP/IP suite that belongs in the Network layer of the OSI model. ARP obtains the MAC (physical) address of a host, or node, and then creates a local database that maps the MAC address to the host’s IP (logical) address. |
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Backbone |
The central conduit of a network that connects network segments and significant shared devices (such as routers, switches, and servers) and is sometimes referred to as “a network of networks.” |
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Bandwidth |
(1) The amount of traffic, or data transmission activity, on a network. (2) A measure of the difference between the highest and lowest frequencies that a medium can transmit. |
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Connectionless/Best-effort protocol |
A type of Transport layer protocol that services a request without requiring a verified session and without guaranteeing delivery of data. |
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Bus topology |
A topology in which a single cable connects all nodes on a network without intervening connectivity devices. |
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Call tracking system |
A software program used to document technical problems and their resolutions; also known as help desk software. |
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CAN (campus area network) |
A network of connected LANs within a limited geographical area, such as the buildings on a university campus. |
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Catastrophic failure |
A failure that destroys a component beyond use. |
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Client-Server applications |
Data or a service requested by one computer from another. |
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Client-Server network model |
A network where resources are managed by the NOS via a centralized directory database. |
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Connection-oriented protocol |
A type of Transport layer protocol that requires the establishment of a connection between communicating nodes before it will transmit data. |
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Convergence |
The use of data networks to carry voice, video, and other communications services in addition to data. |
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Data Link layer |
The second layer in the OSI model. The Data Link layer, also called the Link layer, bridges the networking media with the Network layer. Its primary function is to divide the data it receives from the Network layer into frames that can then be transmitted by the Physical layer. |
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MAC (Media Access Control)/Data Link layer address |
A 48- or 64-bit network interface identifier that includes two parts: the OUI, assigned by IEEE to the manufacturer, and the extension identifier, a unique number assigned to each NIC by the manufacturer. |
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Datagram |
A UDP message. |
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Decapsulation |
Removing a header or trailer from a lower OSI layer. |
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Delay-sensitive |
Transmissions that will suffer significantly compromised user experiences if portions of the transmission are delayed, such as with voice and video transmissions. |
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Demarcation point/Demarc |
The point of division between a telecommunications service carrier’s network and a building’s internal network. |
