Mobility Electronics NP644 - Manual (Page 29)

NP644 IEEE 802.11g Wireless Network USB Adaptor 29
YML787 Rev1
Channel: The bandwidth which wireless Radio operates is divided into
several segments, which we call them “Channels”. AP and the client
stations that it associated work in one of the channels.
CSMA/CA: In local area networking, this is the CSMA technique that combines
slotted time -division multiplexing with carrier sense multiple access/
collision detection (CSMA/CD) to avoid having collisions occur a
second time. This works best if the time allocated is short compared
to packet length and if the number of situations is small.
CSMA/CD: Carrier Sense Multiple Access/Collision Detection, which is a
LAN access method used in Ethernet. When a device wants to
gain access to the network, it checks to see if the network is quiet
(senses the carrier). If it is not, it waits a random amount of time
before retrying. If the network is quiet and two devices access
the line at exactly the same time, their signals collide. When the
collision is detected, they both back off and wait a random amount
of time before retrying.
DHCP: Dynamic Host Configuration Protocol, which is a protocol that lets
network administrators manage and allocate Internet Protocol
(IP) addresses in a network. Every computer has to have an IP
address in order to communicate with each other in a TCP/IP based
infrastructure network. Without DHCP, each computer must be
entered in manually the IP address. DHCP enables the network
administrators to assign the IP from a central location and each
computer receives an IP address upon plugged with the Ethernet
cable everywhere on the network.