Operation Manual

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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.
Proxy: A device that closes a straight connection from an outside network (WAN) to an inside network (LAN).
All transmissions must go through the proxy to get into or out of the LAN. This makes the internal addresses
of the devices in the LAN private.
PVC: Permanent Virtual Circuit: A software defined logical connection in a network; A Virtual Circuit that is
permanently available to the user.
RIP: Routing Information Protocol: A management protocol that ensures that all hosts in a particular network
share the same information about routing paths. In a RIP, a host computer will send its entire routing table to
another host computer every X seconds, where X is the supply interval. The receiving host computer will in
turn repeat the same process by sending the same information to another host computer. The process is
repeated until all host computers in a given network share the same routing knowledge.
RIPv1: RIP Version 1: One of the first dynamic routing protocols introduced used in the internet, RIPv1 was
developed to distribute network reach ability information for what is now considered simple topologies.
RIPv2: RIP Version 2: Shares the same basic concepts and algorithms as RIPv1 with added features such as
subnet masks, authentication, external route tags, next hop addresses, and multicasting in addition to
broadcasting.
Router Mode: Router Mode is used when there is more than one PC connected to the LAN-side Ethernet
and/or USB port. This enables the ADSL WAN access to be shared with multiple nodes on the LAN. Network
Address Translation (NAT) is supported so that one WAN-side IP address can be shared among multiple
LAN-side devices. DHCP is used to serve each LAN-side device and IP address.
SNAP: SubNetwork Attachment Point.
SNMP: Simple Network Management Protocol: Used to govern network management and monitor devices
on the network. SNMP is formally described in RFC 1157.
SNR: Signal-to-Noise Ratio: Measured in decibels, SNR is a calculated ratio of signal strength to background
noise. The higher this ratio, the better the signal quality.
Subnet Mask: Short for SubNetwork Mask, subnet mask is a technique used by the IP protocol to filter
messages into a particular network segment, called a subnet. The subnet mask consists of a binary pattern
that is stored in the client computer, server, or router. This pattern is compared with the incoming IP address
to determine whether to accept or reject the packet.
TCP: Transfer Control Protocol: Works together with Internet Protocol for sending data between computers
over the Internet. TCP keeps track of the packets, making sure that they are routed efficiently.
TFTP: Trivial File Transfer Protocol: A simple version of FTP protocol that has no password authentication or
directory structure capability.
Trellis Code: An advanced method of FEC (Forward Error Correction). When enabled, it makes for better
error checking at the cost of slower packet transmission. Setting Trellis Code to Disabled will cause increased
packet transmission with decreased error correction.
TTL: Time To Live: A value in an IP packet that indicates whether or not the packet has been propagating
through the network too long and should be discarded.