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Flash memory A type of memory that does not lose data when power is re-
moved from it. Flash memory is commonly used as a supplement to or
replacement for hard disks in portable computers. In this context, flash
memory either is built in to the unit or, more commonly, is available as a
PC Card that can be plugged in to a PCMCIA slot.
FTP Acronym for File Transfer Protocol . The standard Internet protocol for
downloading, or transferring, files from one computer to another.
Gateway
A device that acts as a central point for networked devices, receives
transmitted messages, and forwards them. GlobeSurfer 3G can link many
computers on a single network, and can share an encrypted Internet con-
nection with wired and wireless devices.
Gateway address The IP address you use when you make a connection out-
side your immediate network.
Hexadecimal A numbering system that uses 16 rather than 10 as the base for
representing numbers. It is therefore referred to as a base-16 numbering
system. The hexadecimal system uses the digits 0 through 9 and the let-
ters A through F (uppercase or lowercase) to represent the decimal num-
bers 0 through 15. For example, the hexadecimal letter D represents the
decimal number 13. One hexadecimal digit is equivalent to 4 bits, and 1
byte can be expressed by two hexadecimal digits.
HomePNA An industry standard that ensures that through existing telephone
lines and a registered jack, computer users on a home network can share
resources (such as an Internet connection, files, and printers) without in-
terfering with regular telephone service. HomePNA currently offers data
transmission speeds of up to 10 Mbps.
HomeRF An industry standard that combines 802.11b and portable phone
standards for home networking. It uses frequency hopping (switching of
radio frequencies within a given bandwidth to reduce the risk of unau-
thorized signal interception). HomeRF offers data transmission speeds
of up to 1.6 Mbps at distances of up to 150 feet.
Host name
The DNS name of a device on a network, used to simplify the
process of locating computers on a network.
Hub A device that has multiple ports and that serves as a central connection
point for communication lines from all devices on a network. When data
arrives at one port, it is copied to the other ports.
IEEE Acronym for Institute of Electrical and Electronics Engineers . A society of
engineering and electronics professionals that develops standards for the
electrical, electronics, computer engineering, and science-related indus-
tries. The IEEE (Eye-triple-E) is a non-profit, technical professional asso-
ciation of more than 377,000 individual members in 150 countries. The
full name is the Institute of Electrical and Electronics Engineers, Inc., al-
though the organization is most popularly known and referred to by the
letters I-E-E-E.
Infrastructure network A network configuration in which wireless devices
connect to a wireless access point (such as GlobeSurfer 3G) instead of
connecting to each other directly.
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