Specifications

Wireless USB Adapter
61
TFTP (Trivial File Transfer Protocol) – A version of the TCP/IP FTP protocol
that has no directory or password capability.
Throughput – The amount of data moved successfully from one place to
another in a given time period.
Topology – A network’s topology is a logical characterization of how the
devices on the network are connected and the distances between them.
The most common network devices include hubs, switches, routers, and
gateways. Most large networks contain several levels of interconnection, the
most important of which include edge connections, backbone connections,
and wide-area connections.
Wireless USB Adapter
62
UDP (User Datagram Protocol) – A communications method (protocol) that
offers a limited amount of service when messages are exchanged between
computers in a network that uses the Internet Protocol (IP). UDP is an
alternative to the Transmission Control Protocol (TCP) and, together with IP, is
sometimes referred to as UDP/IP. Like the Transmission Control Protocol,
UDP uses the Internet Protocol to actually get a data unit (called a datagram)
from one computer to another. Unlike TCP, however, UDP does not provide
the service of dividing a message into packets (datagrams) and reassembling
it at the other end. Specifically, UDP doesn’t provide sequencing of the
packets that the data arrives in. This means that the application program that
uses UDP must be able to make sure that the entire message has arrived and
is in the right order. Network applications that want to save processing time
because they have very small data units to exchange (and therefore very little
message reassembling to do) may prefer UDP to TCP.
Upgrade – To replace existing software of firmware with a newer version.
Upload – To send a file transmitted over a network. In a communications
session, upload means transmit, and download means receive.
URL (Uniform Resource Locator) – The address that defines the route to a
file on the Web or any other Internet facility. URLs are typed into the browser
to access Web pages, and URLs are embedded within the pages themselves
to provide the hypertext links to other pages.