Manual

iPocket232 User Guide Appendix A: Glossary of Terms and Acronyms
23-CML000293 Precidia Technologies Inc. A-3
HTTP HyperText Transfer Protocol. A stateless protocol used by the World Wide Web.
HTTP defines how messages are formatted and transmitted, and which actions
Web servers and browsers should take in response to various commands. Defined
in RFC2616.
binary numbers, where a byte contains 8 bits. One hexadecimal digit can repre-
sent the arrangement of four binary digits. Two hexadecimal digits can represent
eight binary digits, or a byte.
CMP Internet Control Message Protocol. An extension to IP, ICMP supports packets
containing error, control, and informational messages. Defined in RFC792.
ID Identification/Identifier/Identity.
IEEE Institute of Electrical and Electronic Engineers.
I/O Input/Output.
IP Internet Protocol. The network layer for the TCP/IP protocol suite, widely used
with Ethernet networks. IP is a connectionless, best-effort packet switching pro-
tocol. It provides packet routing, fragmentation and re-assembly through the data
link layer. Defined in RFC791.
IP Address The notation that expresses the four-byte (32-bit) address as a sequence of four
decimal numbers separated by dots. IP addresses are made up of four numbers
from 0 to 255, separated by periods (e.g. 255.255.255.0).
IPsec Internet Protocol Security. A protocol providing security for transmission of sen-
sitive information over unprotected networks, such as the Internet. IPsec acts at
the network layer, protecting and authenticating IP packets between participating
devices (peers), such as routers.
LAN Local Area Network. A data communications network which is geographically
limited (typically to a 1 km radius), allowing easy interconnection of terminals,
microprocessors and computers with adjacent buildings.
LRC Longitudinal Redundancy Checking. An error checking method that generates a
parity byte from a specified string or block of bytes.
LSB Least Significant Bit/Byte. Bit zero, the bit in a binary number giving the number
of ones, the last or rightmost bit.
MD5 Message Digest 5. An algorithm used to verify data integrity through the creation
of a 128-bit message digest from data input. Defined in RFC1321.