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Glossary
10BASE-T IEEE 802.3 specification for 10 Mbs Ethernet
ARP Address Resolution Protocol
Baud Rate Data transmission rate
bps Bits per second, the actual data rate
Cat5 Cable Type of cable used on a LAN to connect computers, printers, and transmitters and receivers to a hub on
the network
CIF Common Intermediate Format; video format with 352 x 288 pixels
Default Gateway The router’s IP address (for example, 192.168.0.1)
DHCP Dynamic Host Configuration Protocol
DNS Domain Name Service
FTP File Transfer Protocol
Full Duplex Simultaneous data transmission in both directions
G.711, G.728 Standard audio coding algorithms defined by ITU-T
H.224 Standardized protocol for data communication and remote control
H.261 Standard motion video coding algorithm defined by ITU-T
H.323 Standard for M-JPEG video and audio compression defined by ITU-T
HTML Hypertext Markup Language
HTTP Hypertext Transfer Protocol
Hub A device on the network that connects multiple computers together to form a LAN
ICMP Internet Control Message Protocol
ID Identification: machine readable number or name
IGMP Internet Group Management Protocol
IEEE Institute of Electrical and Electronics Engineers
Internet Protocol The main protocol used on the Internet. Forms—in conjunction with the Transmission Control Protocol
(TCP)—the TCP/IP protocol suite.
IP See Internet Protocol
IP Address A unique four-byte number that identifies each unit on the Internet or network. Usually written in dotted
decimal notation with periods separating the bytes. This address is required to communicate on the net-
work (for example, 192.168.0.100)
ISDN Integrated Services Digital Network
ISP Internet Service Provider
JPEG Joint Photographic Expert Group (procedure to encode still images)
Kbps Kilobits per second; the actual data rate
LAN Local Area Network. Multiple computers linked together into a network to share information within a lim-
ited geographic area (such as a building or a campus) controlled by a network operating system and using
a transport protocol.
MAC Address Media Access Control/hardware address
Mbps Megabits per second; the actual data rate
MPEG-4 Used for transmission of audiovisual data with very low transfer rates (for example, via Internet); further
development of MPEG-2 (enhanced video compression standard)
NAT Network Address Translator. A proposal for IP address for re-use where the local IP address is mapped to
a globally unique address
Network Address Translator A proposal for IP address re-use where the local IP address is mapped to a globally unique address
Parameter Values used for the configuration of the network system
Picture A video picture that has been digitized at a particular resolution
PPP Point-To-Point Protocol. A protocol allowing a computer using TCP/IP to connect directly to the Internet
Router A physical device that connects multiple LANs; a router knows where to direct a given packet of data
QCIF Quarter CIF, video format with 176 x 144 pixels
Server Push A continuous stream sent from the transmitter to the web browser