Manual

Appendix A: Glossary of Terms and Acronyms iPocket232 User Guide
A-2 Precidia Technologies Inc. 23-CML000293
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 Inter-
net. 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 numbering 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.