Dynamix UM-A User Manual page 144

IAD : Integrated Access Device: A device that multiplexes and demultiplexes communications in the
CPE onto and out of a single telephone line for transmission to the CO.
IP : Internet Protocol: The method by which information is sent from one computer to another through
the Internet. Each of these host computers have a unique IP address which distinguishes it from all the
other computers on the internet. Each packet of data sent includes the sender's IP address and the
receiver's IP address.
LAN : Local Area Network: A group of computers, typically covering a small geographic area, that
share devices such as printers, hard disk drives, scanners, and optical drives. Computers in a LAN
typically share an internet connection through some sort of router that connects the computers to a
WAN.
LLC : Logical Link Control: Provides an interface point to the MAC sublayer. LLC Encapsulation is
needed when several protocols are carried over the same Virtual Circuit.
MAC Address : Media Access Control Address: A unique hardware number on a computer or device
that identifies it and relates it to the IP address of that device.
MC : Multicast: Communication involving a single sender and multiple specific receivers in a network.
MRU : Maximum Receive Unit: MRU: Maximum Receive Unit (MRU) is the largest size packet that
can be received by the modem. During the PPP negotiation, the peer of the PPP connection will
indicate its MRU and will accept any value up to that size. The actual MTU of the PPP connection will
be set to the smaller of the two (MTU and the peer's MRU). In the normal negotiation, the peer will
accept this MRU and will not send packet with information field larger than this value.
MSS : Maximum Segment Size: The largest size of data that TCP will send in a single, unfragmented
IP packet. When a connection is established between a LAN client and a host in the WAN side, the
LAN client and the WAN host will indicate their Maximum Segment Size during the TCP connection
handshake.
MTU : Maximum Transmission Unit: The largest size packet that can be sent by the modem. If the
network stack of any packet is larger than the MTU value, then the packet will be fragmented before
the transmission. During the PPP negotiation, the peer of the PPP connection will indicate its MRU and
will accept any value up to that size. The actual MTU of the PPP connection will be set to the smaller
of the two (MTU and the peer's MRU).
NAPT : Network Address and Port Translation: An extension of NAT, NAPT maps many private
internal addresses into one IP address. The outside network (WAN) can see this one IP address but it
cannot see the individual device IP addresses translated by the NAPT.
NAT : Network Address Translation: The translation of an IP address of one network to a different IP
address known by another network. This gives an outside (WAN) network the ability to distinguish a
device on the inside (LAN) network, as the inside network has a private set of IP address assigned by
the DHCP server not known to the outside network.
PAP : Password Authentication Protocol: An authentication protocol in which authorization is done
through a user name and password.
PDU : Protocol Data Unit: A frame of data transmitted through the data link layer 2.
Ping : Packet Internet Groper: A utility used to determine whether a particular device is online or
connected to a network by sending test packets and waiting for a response.
PPP : Point-to-Point Protocol: A method of transporting and encapsulating IP packets between the user
PC and the ISP. PPP is full duplex protocol that is transmitted through a serial interface.
4/1 Port ADSL Router P 143