Terminology

Others

●IP address

Identification number assigned to each computer that is connected to a network. The address is used for communication between network devices.

●LAN (Local Area Network)

A network structured within a relatively small range such as in a single building or an office of a company.

●DHCP (Dynamic Host Control Protocol)

Method of automatically assigning IP address within a network. When a computer is connected to a network, the DHCP server automatically assigns the IP address.

●WAN (Wide Area Network)

A network structured within a wide area such as between the main office of a company and its branch offices. Internet is also generally referred to as WAN.

●Netmask

An IP address has the following two roles: 1) address for identifying the network, and 2) address for identifying individual computers. Netmask is a 32-bit value that defines the number of bits of the IP address to use for identifying the network.

●Gateway

Hardware and software that translates different types of protocols when a computer communicates with another computer outside the network. The gateway IP address is referred to as the gateway address.

●RTP (Realtime Transport Protocol)

Protocol to transmit in realtime digitalized video/audio data via a network.

●RTSP (Real Time Streaming Protocol)

Protocol to control realtime transmission of video/audio data via a network.

●HTTP (Hypertext Transport Protocol)

Protocol used when transferring HTML (Hypertext Markup Language) files between WWW server and browser.

●Protocol

A set rule for a computer or communication device to perform communication over a network, etc.

●IEEE802,11b

International standard for wireless LAN with maximum communication speed of 11Mbps.

●Channel (wireless LAN)

Frequency range used by wireless LAN. The same frequency must be set by two sides for proper communication.

If there is an access point, adapter, etc., using the same band in the proximity, there may be a hindrance in the communication and may reduce throughput or the quality of communication. When setting, check the settings of surrounding access points, etc., to avoid doubling.

●ESS-ID (wireless LAN)

Network identification name used by wireless LAN. The name is used to distinguish other wireless LAN devices.

●Ad hoc mode (wireless LAN)

A mode for direct communication without passing through an access point.

●Infrastrucre (wireless LAN)

Form of communication via an access point.

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Others

Terminology

●Encryption mode

Setting for encrypting the flow of data during wireless communication. Following settings are available:

None (Open System): No encryption. Setting will be unavailable and throughput will be improved. However, there is the risk of infor-

	mation leakage.
40blt WEP:	Encryption is performed using 40-blt encryption key.
128blt:	Encryption is performed using 104-blt + 24-blt (1V) keys. Although throughput will decline compared to Open
	System, security of data will be improved.

●Access point (wireless LAN)

Relay point for infrastructure communication. It can also serve as the relay point for cable LAN or wireless LAN.

●ASF (Advanced Streaming Format)

Data streaming format developed by Microsoft Corporation (U.S.) for transmission of video and audio.

●Host name

Name of a device (not limited to a computer but all connection devices with an IP address) on a network.

●Port number

Number used for detecting applications and service during TCP/IP communication.

●TCP/IP

Abbreviation for Transmission Control Protocol/Internet Protocol and is one of the protocols used during network connection.

●UDP

Different from TCP, UDP is a low-level protocol that does not perform receive checks. In some cases, missing and distorted images may occur due to packet loss.