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Appendix A
A-7
Glossary
• 802.11b
See IEEE802.11b
• Ad-Hoc Network
An ad-hoc network is the designation for a number of computers
which form an independent wireless 802.11 WLAN together with a
wireless adapter. Ad-hoc networks are operated independently (with-
out access points) on a peer-to-peer basis. The ad-hoc mode is also
referred to as IBSS mode (Independent Basic Service Set). Its applica-
tion makes sense in very small networks, e.g. if two notebooks are to
be networked without an access point.
• DCE
Data Communications Equipment, a configuration option of the
RS232 interface of the ComPoint Butterfly SC. A DCE can in all cases
only be directly connected to a DTE. To set up DTE/DTE or DCE/
DCE connections, you have to use a cable adapter or a null modem.
This interface corresponds, for instance, to a RS232 jack (female) at
the modem.
• Default Gateway
Designates the address of the router to which the complete traffic is
sent which is not intended to go over the proper network.
• DHCP
Dynamic Host Configuration Protocol: A protocol which performs
the IP configuration for individual computers in the network auto-
matically and centrally. If a networked computer is to be integrated
into the network or the Internet via the Internet protocol (TCP/IP), it
requires a number of basic settings which are essential for any com-
munication. This process can be performed without the interaction
of a user via a DHCP server, since the DHCP server knows the settings
and forwards them to the clients. Without such a DHCP server, the
user has to make the settings manually. Each time he changes the net-
work, e.g. when he takes his notebook from one location to another,
he has to enter the settings again. If a DHCP server is used, this pro-
cess is automatically performed each time.
• DNS
DNS means Domain Name System and administrates the allocation
of IP addresses to domain names. DNS is used, for instance, to allo-
cate the corresponding IP address to the domain www.funkwerk-
ec.com.