User guide

Glossary Ubee Interactive
28 Ubee DVW2110 Wireless Voice Cable Modem and Router Subscriber User Guide • December 2011
Subnet
A portion of a network that shares a common address component. On TCP/IP networks,
subnets are defined as all devices whose IP addresses have the same prefix. For example, all
devices with IP addresses that start with 10.1.10 would be part of the same subnet. IP
networks are divided using a subnet mask.
Subnet Mask
Combined with the IP address, the IP subnet mask allows a device to know which other
addresses are local to it, and which must be reached through a gateway or router. A number
that explains which part of an IP address comprises the network address and which part is the
host address on that network.
Telnet
A network protocol used on the Internet or a local area network. Provides bi-directional
interactive text-oriented communications using a virtual terminal connection.
Terminal Access Controller Access-Control System (TACACS)
A remote authentication protocol used to communicate with an authentication server to
determine if the user is allowed to access the network.
Time Division Multiple Access (TDMA)
A method in which cable modems must time-share the upstream channel because there are
many cable modems and only one upstream channel frequency.
Transmission Control Protocol (TCP)
A method (protocol) used with the IP to send data in the form of message units (datagrams)
between network devices over a LAN or WAN. While IP handles the actual delivery of the data
(routing), TCP keeps track of the individual units of data (packets) that a message is divided
into for efficient delivery over the network. TCP requires the receiver of a packet to return an
acknowledgment of receipt to the sender of the packet.
Transmission Control Protocol/Internet Protocol (TCP/IP)
The basic communication language or set of protocols to communicate over a network
(developed specifically for the Internet). TCP/IP defines a suite or group of protocols.
Trivial File Transfer Protocol
A file transfer protocol used to transfer automatically configuration or boot files.
Uniform Resource Identifier (URI)
A string of characters used to identify a name or a resource on the Internet.
Upstream
A term to describe the direction of data from the customer to the network service provider.
Uniform Resource Locator (URL)
A URI that specifies where a known resource is available and how to retrieve it.