Helmholz NETLink 700-881-MPI21 - Page 61

NETLink
®
Ethernet Products
61
Channel: Transmission frequency that is to be used in the ad hoc mode. The access points
provide the channel in the infrastructure mode
Client A device that requests services. The requests are sent to a server, which returns
the relevant answers to the client.
dBi:
Antenna gain in decibel with regard to an isotropic radiator
DHCP Dynamic Host Configuration Protocol, DHCP server can dynamically pass an ->
IP address and other parameters to DHCP clients on request.
DNS Domain Name System is a shared database system in LAN as well as in the
internet that transforms IP addresses into plain text addresses
Domain
name
The domain is the name of an Internet page. It consists of the name and an
extension. The domain of Helmholz is: www.helmholz.de
Encryp-
tion:
Encryption is the general term for encoding procedures
Endspan
The Endspan device is also usually a switch which, as PSE, has the PoE functionality.
Firewall A service running on a server that blocks certain services/ports and prohibits
unauthorized access
Flow Con-
trol:
A process that sends a break frame if the data buffer is almost full.
Gap The Gap Update Factor specifies after how many token cycles the master
checks
whether an additional master is signaling its presence on the bus
Gateway This is a machine that works like a router. Unlike a router , a gateway can also
route data packets from different hardware networks.
HMI Human-Machine Interface denotes the interface between the human operator
and a system through which the operator can operate the system or intervene in
the process
Hex:
A key for NETLink
®
WLAN that is entered in hexadecimal notation
HSA
Highest station address that is polled
Hub A mediation system between LAN segments. Unlike a switch, on a hub, all data
arising in the Ethernet are applied to all ports
Infrastruc-
ture:
Operation type according to WLAN standard IEEE 802.11 that needs an access
point. The access point is generally linked to an internal firm network via LAN
in this mode
Interfaces General definition of interfaces, such as a network interface card that constitutes
an Ethernet interface
IP address Internet protocol address. The IP is the address of a device in a network at which
it can be reached. It consists of four bytes
and is expressed in decimal notation.
Example: 192.168.4.49
ISO on top
of TCP
see RFC1006
Keytype:
Character set that is to be used for the key. HEX or Passphrase (ASCII)
LAN Local area network, a network of computers that are relatively close to each
other physically.
MAC-
Adresse
The Media Access Control address is used only once for each single network
component that is not changeable. It consists of 6 bytes and is written in