Digisol DG-FS1526, User Manual, Page: 61 / 62

DG-FS1526 User Manual
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9 Glossary
Auto-negotiation:
Auto-negotiation is an Ethernet procedure by which two connected devices choose common
transmission parameters, such as speed, duplex mode, and flow control. In this process, the connected devices first share
their capabilities as for these parameters and then choose the highest performance transmission mode they both support.
Backpressure:
The build-up of data behind an I/O switch if the buffers are full and incapable of receiving any more
data; the transmitting device halts the sending of data packets until the buffers have been emptied and are once more capable
of storing information
.
Flow-control:
Flow control is the process of managing the pacing of data transmission between two nodes to prevent a
fast sender from outrunning a slow receiver. It provides a mechanism for the receiver to control the transmission speed, so
that the receiving node is not overwhelmed with data from transmitting node.
Address Learning:
Address learning is a service that characterizes a learning bridge, in which the source MAC
address of each received packet is stored so that future packets destined for that address can be forwarded only to the bridge
interface on which that address is located.
TCP:
The Transmission Control Protocol (TCP) is one of the core protocols of the Internet Protocol Suite. TCP is one of
the two original components of the suite, complementing the Internet Protocol (IP), and therefore the entire suite is
commonly referred to as TCP/IP. TCP provides reliable, ordered delivery of a stream of bytes from a program on one
computer to another program on another computer.
UDP:
User Datagram Protocol. UDP provides a datagram mode for packet-switched communications. It uses IP as the
underlying transport mechanism to provide access to IP-like services. UDP packets are delivered just like IP packets –
connection-less datagrams that may be discarded before reaching their targets. UDP is useful when TCP would be too
complex, too slow, or just unnecessary.
FTP:
File Transfer Protocol (FTP) is a standard network protocol used to copy a file from one host to another over a TCP-
based network, such as the Internet. FTP is built on client-server architecture and utilizes separate control and data
connections between the client and server.
Http:
The Hypertext Transfer Protocol (HTTP) is a networking protocol for distributed, collaborative, hypermedia
information systems.
TELNET:
Telnet defines a remote communication facility for interfacing to a terminal device over TCP/IP.
ToS:
Type of Service level, which processes the precedence part of the IP packet ToS (3 bits) as an index to the eight QoS
Class values.