greater the probability that the original data can be recovered. Even if one or more bits in the chip are damaged during transmission, statistical techniques embedded in the radio can recover the original data without the need for retransmission. To an unintended receiver, DSSS appears as low power wideband noise and is rejected (ignored) by most narrowband receivers.
Dynamic DNS (Domain Name System) – A system for keeping a domain name linked to a changing IP address. A dynamic DNS Service Provider maintains a database of the updated IP addresses linked to a domain name.
Dynamic IP Address - An IP address that is automatically assigned to a client station in a TCP/IP network, typically by a DHCP server. Network devices that serve multiple users, such as servers and printers, are usually assigned static IP addresses.
Dynamic Routing - The ability for a router to forward data via a different route based on the current conditions of the communications circuits. For example, it can adjust for overloaded traffic or failing lines and is much more flexible than static routing, which uses a fixed forwarding path.
Ethernet - IEEE standard network protocol that specifies how data is placed on and retrieved from a common transmission medium. Has a transfer rate of 10 Mbps. Forms the underlying transport vehicle used by several
Fast Ethernet - A 100 Mbps technology based on the
Firewall – A firewall is a set of related programs, located at a network gateway server, which protects the resources of a
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network from users from other networks. (The term also implies the security policy that is used with the programs.) An enterprise with an intranet that allows its workers access to the wider Internet installs a firewall to prevent outsiders from accessing its own private data resources and for controlling what outside resources to which its own users have access. A firewall, working closely with a router, examines
Firmware - Programming that is inserted into programmable
Flash Memory - Flash memory is an electronic storage device capable of recording several megabytes of data files.
Fragmentation - Breaking a packet into smaller units when transmitting over a network medium that cannot support the original size of the packet.
Hardware - Hardware is the physical aspect of computers, telecommunications, and other information technology devices. The term arose as a way to distinguish the “box” and the electronic circuitry and components of a computer from the program you put in it to make it do things. The program came to be known as the software.
Hub - The device that serves as the central location for attaching wires from workstations. Can be passive, where there is no amplification of the signals; or active, where the hubs are used like repeaters to provide an extension of the cable that connects to a workstation.
IEEE (Institute of Electrical and Electronics Engineers) - The IEEE fosters the development of standards that often become
national and international standards. The organization publishes a number of journals, has many local chapters, and
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