Precidia ipocket232, User Manual

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iPocket 232 User Guide Appendix A: Glossary of Terms and Acronyms
23-CML000293 iPocket232 Inc. A-2
DES
Data Encryption Standard. A standard cryptography method that uses a 56-bit
private key. DES performs encryption operations on 64-bit blocks of data in 16
rounds. DES was developed by IBM in 1977 and was considered “strong”
encryption.
3DES
TripleDES provides even stronger encryption than DES, by extending the 56-bit
private key to 192 bits.
DHCP
Dynamic Host Configuration Protocol. A protocol for assigning dynamic IP
addresses to devices on a network.
DIN
Deutsches Institut für Normung E.V ., a standards organization.
DLE
Data Link Escape . Mnemonic for ASCII 16, a transmission control character
that changes the meaning of a limited number of contiguously following
characters or coded representations.
DSR
Data Set Ready. A modem signal line (pin 6 of DB-9 connectors), used for RS-
232 hardware flow control. It is the counterpart to Data Terminal Ready (DTR).
DSU
Data Service Unit. A device that connects a terminal or computer to a digital
line.
DTE
Data Terminal Equipment . The interface used to exchange between computers.
DTR
Data Terminal Ready . A modem signal line (pin 4 of DB-9 connectors), used for
RS-232 hardware flow control. It is the counterpart to Data Set Ready (DSR).
Ethernet
An industry standard local area network architecture that serves as the basis for
IEEE 802.3. Ethernet uses a bus or star topology and supports data transfer rates
of 10 and 100 Mbps.
ETX
End of Text . Mnemonic for the ASCII 3 character, signaling the end of a text
frame.
FCC
Federal Communication Commission.
Gateway
A device that enables data to flow between different networks, forming an
Internet. In this case, a router connects two broadcast networks at the IP layer 3.
Hex
Hexadecimal . It refers to a base-16 numbering system, as opposed to binary,
which is a base-2 numbering system. Hexadecimal numbers consist of numbers
0-9, and letters A-F. Hexadecimal is commonly used to express 8-bit binary
numbers. One hexadecimal digit can represent the arrangement of four binary
digits. Two hexadecimal digits can represent eight binary digits, or a byte.