iPocket232 User Guide Appendix A: Glossary of Terms and Acronyms
23-CML000293 iPocket232 Inc. A-3
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
represent the arrangement of four binary digits. Two hexadecimal digits can
represent eight binary digits, or a byte.
Internet Control Message Protocol. An extension to IP, ICMP supports packets
containing error, control, and informational messages. Defined in RFC792.
Identification/Identifier/Identity.
Institute of Electrical and Electronic Engineers.
Internet Protocol. The network layer for the TCP/IP protocol suite, widely used
with Ethernet networks. IP is a connectionless, best-effort packet switching
protocol. It provides packet routing, fragmentation and re-assembly through the
data link layer. Defined in RFC791.
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).
Internet Protocol Security. A protocol providing security for transmission of
sensitive 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.
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.
Longitudinal Redundancy Checking. An error checking method that generates a
parity byte from a specified string or block of bytes.
Least Significant Bit/Byte. Bit zero, the bit in a binary number giving the number
of ones, the last or rightmost bit.
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