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D-Link DGS-1005D Unmanaged Gigabit Ethernet Switch
latency – The delay between the time a device receives a packet and the time the packet is forwarded out of the
destination port.
line speed – See baud rate.
main port – The port in a resilient link that carries data traffic in normal operating conditions.
MDI – Medium Dependent Interface. An Ethernet port connection where the transmitter of one device is connected to
the receiver of another device.
MDIX – Medium Dependent Interface Cross-over. An Ethernet port connection where the internal transmit and
receive lines are crossed.
MIB – Management Information Base. Stores a device’s management characteristics and parameters. MIBs are used
by the Simple Network Management Protocol (SNMP) to contain attributes of their managed systems. The Switch
contains its own internal MIB.
multicast – Single packets copied to a specific subset of network addresses. These addresses are specified in the
destination-address field of the packet.
protocol – A set of rules for communication between devices on a network. The rules dictate format, timing,
sequencing, and error control.
resilient link – A pair of ports that can be configured so that one will take over data transmission should the other fail.
See also main port and standby port.
RJ-45 – Standard 8-wire connectors for IEEE 802.3 10BASE-T networks.
RMON – Remote Monitoring. Subset of SNMP MIB II, which allows monitoring and management capabilities by
addressing up to ten different groups of information.
RPS – Redundant Power System. A device that provides a backup source of power when connected to the Switch.
server farm – A cluster of servers in a centralized location serving a large user population.
SLIP – Serial Line Internet Protocol. A protocol that allows IP to run over a serial line connection.
SNMP – Simple Network Management Protocol. A protocol originally designed to be used in managing TCP/IP
internets. SNMP is presently implemented on a wide range of computers and networking equipment and may be used
to manage many aspects of network and end station operation.
Spanning Tree Protocol – (STP) A bridge-based system for providing fault tolerance on networks. STP works by
allowing you to implement parallel paths for network traffic, and to ensure that redundant paths are disabled when the
main paths are operational and enabled if the main paths fail.
stack – A group of network devices that are integrated to form a single logical device.
standby port – The port in a resilient link that will take over data transmission if the main port in the link fails.
switch – A device that filters, forwards, and floods packets based on the packet’s destination address. The Switch
learns the addresses associated with each switch port and builds tables based on this information to be used for the
switching decision.
TCP/IP – A layered set of communications protocols providing Telnet terminal emulation, FTP file transfer, and other
services for communication among a wide range of computer equipment.
Telnet – A TCP/IP application protocol that provides virtual terminal service, letting a user log in to another computer
system and access a host as if the user were connected directly to the host.
TFTP – Trivial File Transfer Protocol. Allows you to transfer files (such as software upgrades) from a remote device
using your switch’s local management capabilities.
UDP – User Datagram Protocol. An Internet standard protocol that allows an application program on one device to
send a datagram to an application program on another device.
VLAN – Virtual LAN. A group of location- and topology-independent devices that communicate as if they are on a
common physical LAN.
VLT – Virtual LAN Trunk. A Switch-to-Switch link which carries traffic for all the VLANs on each Switch.
VT100 – A type of terminal which uses ASCII characters. VT100 screens have a text-based appearance.