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Direct Sequence Spread Spectrum – DSSS. Modulation technique used by 802.11b wireless devices
DNS – Domain Name System. Translates Domain Names to IP addresses
DOCSIS – Data Over Cable Service Interface Specifications. The standard interface for cable modems
Domain name – A name that is associated with an IP address
Download – To send a request from one computer to another and have the file transmitted back to the requesting computer
DSL – Digital Subscriber Line. High bandwidth Internet connection over telephone lines
Duplex – Sending and Receiving data transmissions at the sane time
Dynamic DNS service – DDNS is provided by companies to allow users with Dynamic IP addresses to obtain a Domain Name that will always by linked to their changing IP address. The IP address is updated by either client software running on a computer or by a router that supports DDNS, whenever the IP address changes.
Dynamic IP address – IP address that is assigned by a DHCP server and that may change. Cable Internet providers usually use this method to assign IP addresses to their customers.
E
EAP – Extensible Authentication Protocol
Email – Electronic Mail is a
Encryption – Converting data into cyphertext so that it cannot be easily read
Enterprise – Large organizations that use computers
Ethernet – The most widely used technology for Local Area Networks.
F
Fiber optic – A way of sending data through light impulses over glass or plastic wire or fiber
File server – A computer on a network that stores data so that the other computers on the network can all access it
File sharing – Allowing data from computers on a network to be accessed by other computers on the network will different levels of access rights
Firewall – A device that protects resources of the Local Area Network from unauthorized users outside of the local network
Firmware – Programming that is inserted into a hardware device that tells it how to function
Fragmentation – Breaking up data into smaller pieces to make it easier to store
FTP – File Transfer Protocol. Easiest way to transfer files between computers on the Internet
G
Gain – The amount an amplifier boosts the wireless signal
Gateway – A device that connects your network to another, like the internet
Gbps – Gigabits per second
Gigabit Ethernet – Transmission technology that provides a data rate of 1 billion bits per second Graphical user interface – GUI
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