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GlobeSurfer
®
II 1.8 - 7.2 - 7.2 S
REFERENCE MANUAL
DSL
Acronym for ‘Digital Subscriber Line’. A constant, high-speed digital connection to the Internet that uses standard copper telephone wires.
DSL modem
A device that enables a broadband connection to access the Internet. DSL modems rely on telephone lines that operate at DSL speeds.
Duplex
A mode of connection. Full-duplex transmission allows for the simultaneous transfer of information between the sender and the receiver. Half-
duplex transmission allows for the transfer of information in only one direction at a time.
Dynamic IP address
The IP address assigned (using the DHCP protocol) to a device that requires it. A dynamic IP address can also be assigned to a gateway or
router by an ISP.
Edge computer
The computer on a network that connects the network to the Internet. Other devices on the network connect to this computer. The computer
running the most current, reliable operating system is the best choice to designate as the edge computer.
Encryption
The translation of data into a secret code. Encryption is the most effective way to achieve data security. To read an encrypted file, you must
have access to a secret key or password that enables you to decrypt it.
Ethernet
A networking standard that uses cables to provide network access. Ethernet is the most widely-installed technology to connect computers
together.
Ethernet cable
A type of cable that facilitates network communications. An Ethernet cable comes in a couple of flavors. there is twisted pair, and coax
Ethernet cables. Each of these allow data to travel at 10Mbit per second.
Firewall
A security system that helps protect a network from external threats, such as hacker attacks, originating outside the network. A hardware
Firewall is a connection routing device that has specific data checking settings and that helps protect all of the devices connected to it.
Firmware
Software information stored in nonvolatile memory on a device.
Flash memory
A type of memory that does not lose data when power is removed 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
®
II can link many
computers on a single network, and can share an encrypted Internet connection with wired and wireless devices.
Gateway address
The IP address you use when you make a connection outside 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 letters A through F (uppercase or lowercase) to represent the decimal
numbers 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 interfering with regular telephone service. HomePNA currently offers
data transmission speeds of up to 10 Mbps.
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