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Chapter 3
Appendix
Glossary
ANY Connection
CODEC
(COder DECoder)
DHCP
(Dynamic Host
Configuration Protocol)
DHCP Server
DNS
(Domain Name System)
DNS Server
DSCP
(DiffServ Code Point)
IP address
IP Diffserv
LAN
(Local Area Network)
MAC address value
NAT-Traversal (NAT Translation
Function)
Ping
(Packet Internet Groper)
Private-CA
Root-CA
RTP (Real-time Transport
Protocol)
SIP (Session Initiation
Protocol)
If the SSID of the wireless LAN client is set to 'ANY connection', any wireless LAN access point can
be connected to.
However, access points that reject LAN clients set to 'ANY connection' cannot be connected to.
Algorithm for compressing and decompressing digital video and audio data.
This product supports G.711μ-Law, G711A-Law, and G729.
This is the protocol (communication procedure) for automatically configuring the network settings. The
DHCP server automatically configures the network settings for the network's DHCP clients.
This is the server that automatically assigns DHCP.
Information that can be assigned to client such as IP address, subnet mask, IP address of gateway
and DNS server, and the like are set; this information is provided to accessing clients; and when the
communications are ended, the address is automatically recovered and assigned to other computers.
Used in TCP/IP networks, this is a system related to the actual IP address and the name affixed to
computer.
This is the computer that possesses information related to IP address and name affixed to computer,
and that responds to inquiries from outside.
This is the code (program) for deciding on the actions for routers, etc., in identifying and carrying out
transaction processing to suits the types of services (traffic) on the internet with various features such
as motion picture and voice. For this purpose, a TOS (type of service) field inside the IP packet is
redefined as a DS (DiffServ) field, and in order to decide on actions that the DiffServ target node
(such as router) performs on this DS field, a value is set which becomes the basis for quality of
service.
This is the address (location number) affixed for the purpose of distinguishing all connected devices in
networks built on TCP/IP protocol.
Technology that identifies the types of traffic (this traffic is called services) transmitted and received
by internet users, and offers communications quality (QoS: Quality of Service) that satisfies that type.
This is the abbreviation for local area network. It refers to small-scale computer networks.
This is the ID number that is assigned to be unique for each Ethernet card. There is no duplication of
this number in Ethernet cards worldwide.
This phone also has a unique MAC address.
This is the mechanism for carrying out address translation for communications between hosts within
the organization which have private IP addresses and hosts on the internet having a global IP
address.
A global IP address is an IP address used on the global internet that is unique, while a private IP
address refers to the IP address used only within architectures that are not connected to the internet.
This is the program for diagnosing TCP/IP network such as internet and intranet. When an IP address
to be investigated whether or not it is connected is specified, data is sent using ICMP, and the
network is diagnosed based on whether the other party replies.
Private (user) certificate used for 802.1x authentication.
Root (certification authority) certificate used for 802.1x authentication.
Real-time data transport protocol. RTP is designed on the assumption of being used in applications
such as for remote conferencing making use of image and voice, and has the objective of transporting
the image and voice data in a form appropriate for real time. In RTP, data is divided into packets
based on unit time and transported with the time information of data added to the packets.
This is one of the call control protocols and used in internet calls employing VoIP, and the like. The
transport function, caller number notification function and others, when compared to similar protocols,
provide functions close to that of the public telephone network, and the time required for connection is
also short.
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