Administration Manual ip500pbxw – English
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network keys
(Also known as encryption keys.) 64-bit and 128-bit encryption keys used in WEP wireless security
schemes. The keys encrypt data over the WLAN, and only wireless PCs configured with WEP keys
that correspond to the keys configured on the device can send/receive encrypted data.
network mask
A network mask is a sequence of bits applied to an IP address to select the network ID while
ignoring the host ID. Bits set to 1 mean ‘select this bit’ while bits set to 0 mean ‘ignore this bit.’ For
example, if the network mask 255.255.255.0 is applied to the IP address 100.10.50.1, the network
ID is 100.10.50, and the host ID is 1. See binary, IP address, subnet.
NIC
Network
Interface
Card
An adapter card that plugs into your computer and provides the physical interface to your network
cabling. For Ethernet NICs this is typically an RJ-45 connector. See Ethernet, RJ-45.
packet
Data transmitted on a network consists of packets. Each packet contains a payload (the data), plus
overhead information such as where it came from (source address) and where it should go
(destination address).
pass phrase
A secret password used in WPA wireless data encryption. Encryption is based on a WPA master
key that is derived from the pass phrase and the network name (SSID) of the device. The pass
phrase should be at least 20 characters long in order to deter a hacker attempting to crack the pass
phrase by recording a series of frames then trying commonly used passwords offline until one
works (known as offline PSK dictionary attacks).
ping
Packet Internet (or Inter-Network) Groper
A program used to verify whether the host associated with an IP address is online. It can also be
used to reveal the IP address for a given domain name.
port
A physical access point to a device such as a computer or router, through which data flows into and
out of the device.
PPP
Point-to-Point
Protocol
A protocol for serial data transmission that is used to carry IP (and other protocol) data between
your Service Provider and your computer. The WAN interface on the system uses two forms of
PPP called PPPoA and PPPoE. See PPPoA, PPPoE.
PPPoA
Point-to-Point Protocol over ATM
One of the two types of PPP interfaces you can define for a Virtual Circuit (VC), the other type
being PPPoE. You can define only one PPPoA interface per VC.
PPPoE
Point-to-Point Protocol over Ethernet
One of the two types of PPP interfaces you can define for a Virtual Circuit (VC), the other type
being PPPoA. You can define one or more PPPoE interfaces per VC.
protocol
A set of rules governing the transmission of data. In order for a data transmission to work, both
ends of the connection have to follow the rules of the protocol.
remote
In a physically separate location. For example, an employee away on travel who logs in to the
company’s intranet is a remote user.
RIP
Routing Information Protocol
The original TCP/IP routing protocol. There are two versions of RIP: version I and version II.
RJ-11
Registered Jack Standard-11
The standard plug used to connect telephones, fax machines, modems, etc. to a telephone port. It
is a 6-pin connector usually containing four wires.
RJ-45
Registered Jack Standard-45
The 8-pin plug used in transmitting data over phone lines. Ethernet cabling usually uses this type of
connector.
routing
Forwarding data between your network and the Internet on the most efficient route, based on the
data’s destination IP address and current network conditions. A device that performs routing is
called a router.
SDNS
Secondary Domain Name System (server)
A DNS server that can be used if the primary DSN server is not available. See DNS.
SSID
Service Set Identifier (also known as the Extended Service Set Identifier (ESSID)) is a unique
identifier that differentiates one wireless device from another. Wireless PCs configured with the
same SSID can access that device.
