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Terminology Description
D
DHCP
Dynamic Host Configuration Protocol: Client-server network protocol. The DHCP
server provides corresponding configuration parameters for the DHCP client's
request. These parameters are usually the information that the client host needs
when connecting to the Internet. DHCP also provides a mechanism for assigning
IP addresses to hosts.
DNS
Domain Name Server: A functional entity in a TCP/IP network through which a
user can access a corresponding server only through a domain name. In the
TCP/IP network, the domain name and the IP address correspond one-to-one.
The domain name is easy to remember. However, the servers in the network can
only be identified by IP addresses. The translation between the domain name
and the IP address is called domain name resolution. The domain name
resolution server to complete the DNS is the server for domain name resolution.
DVI
Digital Visual Interface: When a device in the network is overloaded or cannot
receive data again at a specified time, data packet discarding occurs.
F
Firewall
Firewall. Set up a combination of components between different network or
network security domains. It protects the network by monitoring, limiting, and
changing the flow of data across the firewall, shielding the information, structure,
and health of the network as much as possible from the outside.
G
G.711
The speech codec standard (A-law or U-law) using Pulse Code Modulation
(PCM) has a data rate of 64 kbit/s.
G.722
A speech coding standard using adaptive differential pulse code modulation
(ADPCM). The data speed is 48kbit/s, 56kbit/s or 64kbit/s.
GMT
Greenwich Mean Time
GUI
Graphical User Interface
H
H.239
ITU-T recommended standard for allowing simultaneous transmission of data
content such as video and computer desktops in a video conference.
H.264
H.264 provides the same high quality image with only half the bit rate of H.263,
and has strong error resistance.
