Ubee DDW365 User Manual page 87

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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 (TFTP)
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.
Uniform Resource Locator (URL)
A uniform resource identifier (URI) that specifies where a known resource is available and
how to retrieve it.
Upstream
A term to describe the direction of data from the customer to the network service provider.
Ubee DDW365 Wireless Cable Modem Subscriber User Guide • October 2013
Glossary
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