Terminology - Sanyo PLC-XU88-WXU30 Owner's Manual

Chapter 10 Appendix

Terminology

DHCP server (Dynamic Host Configuration Protocol)
It is necessary to set an IP address for each computer or equivalent equipment when a network is
established by TCP/IP. If there exists DHCP server on the network, it will assign IP addresses to client
computers every time they request it. If there exists equipment with DHCP server functions (such
as a Windows 2000 server and a dial-up router) on the network, the DHCP server function may be
automatically operating. Ask your system administrator whether the DHCP server is operating.
ESSID (Extended Service Set Identifier)
ESSID is the ID that is set to computers on Wireless LAN or access point in order to prevent each
computer from being crossed. The computers or access point to which the same ESSID is set can
communicate with each other. If an ESSID is different, it is impossible to communicate. ESSID dis-
tinguishes between lowercase and uppercase characters, and allows you to use English one byte
characters and half-size symbols up to 32 characters.
WEP (Wired Equivalent Privacy)
WEP is a security protocol for Wireless LAN. It protects computers on Wireless LAN and access
point from unauthorized access by setting a description code onto them. It is necessary to set the
same decryption code for equipment.
Wi-Fi (the Standard for Wireless Fidelity)
Wi-Fi is short for Wireless fidelity and a marketing brand name for IEEE 802.11b High-Rate. Only the
products that have passed an inter-operation test carried by WECA is approved as Wi-Fi. Any prod-
ucts approved as Wi-Fi are certified as interoperable with each other by WECA. It is recommended
to use the products approved by Wi-Fi when you introduce network equipment such as local area
network.
Wireless Channel
It is necessary to divide frequency spectrums into some Wireless channels for Wireless communi-
cation, and to tune to the same channel between Wireless equipment. If you use the same channel
on the same floor, and there are some Wireless LANs that have a different ESSID for each, the com-
munication speed may become slow. In that case, using different channels for each Wireless LAN is
effective, which lowers a possibility of mutual interference between Wireless LANs
WECA (Wireless Ethernet Compatibility Alliance)
WECA is an organization promoting IEEE802.11b High -Range standard and assuring the compat-
ibility of products that meet the standard.
MAC address (Media Access Control Address)
MAC address is a physical address for every network interface. The MAC address consists of 6-byte
hex number. The first 3 bytes are a Vendor ID controlled and assigned by IEEE. The last 3 bytes
are controlled and assigned by the manufacturers of network interface (no duplication of MAC
address). Therefore, MAC address is a unique physical address in the world. Ethernet sends and
receives frames on the basis of MAC address.
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