iPocket232 User Guide Appendix A: Glossary of Terms and Acronyms
23-CML000293 iPocket232 Inc. A-2
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.
TripleDES provides even stronger encryption than DES, by extending the 56-bit
private key to 192 bits.
Dynamic Host Configuration Protocol. A protocol for assigning dynamic IP
addresses to devices on a network.
Deutsches Institut für Normung E.V., a standards organization.
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.
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).
Data Service Unit. A device that connects a terminal or computer to a digital
line.
Data Terminal Equipment. The interface used to exchange between computers.
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).
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.
End of Text. Mnemonic for the ASCII 3 character, signaling the end of a text
frame.
Federal Communication Commission.
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.
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.
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