3com 4005 Istruzione Sull'Installazione
G
LOSSARY
ambient air temperature
The temperature of air that surrounds any electrical part or device. Usually refers
to the effect of such temperature in aiding or slowing down removal of heat by
radiation and convection from the part or device in question.
to the effect of such temperature in aiding or slowing down removal of heat by
radiation and convection from the part or device in question.
ASIC
Application Specific Integrated Circuit. A chip that is custom designed for a
specific application.
specific application.
autonegotiation
A feature that allows some 10/100 Mbps or 10/100/1000 Ethernet ports to
self-determine the proper setting for one or more of the following features
between two devices: speed, duplex mode, or flow control.
self-determine the proper setting for one or more of the following features
between two devices: speed, duplex mode, or flow control.
backbone
A relative term that refers to the main segment of a network. A campus backbone
typically runs between buildings. A building backbone connects departments or
floors within a building. A backbone can even function on a large scale
metropolitan or national data or telecommunications network.
typically runs between buildings. A building backbone connects departments or
floors within a building. A backbone can even function on a large scale
metropolitan or national data or telecommunications network.
backplane
The main bus, or physical set of traces, that carries data within a chassis.
bandwidth
Data measured in bits per second that a channel can transmit. The theoretical
bandwidth for an Ethernet segment is 10 mega bits per second (Mbps); for a Fast
Ethernet, 100 Mbps; and for Gigabit Ethernet, 1000 Mbps.
bandwidth for an Ethernet segment is 10 mega bits per second (Mbps); for a Fast
Ethernet, 100 Mbps; and for Gigabit Ethernet, 1000 Mbps.
bridge
Equipment that connects different LANs, allowing communication between
devices that reside on separate LAN segments or collision domains. Bridges are
protocol-independent, but hardware-specific, with communication limited to the
data link layer (Layer 1) and physical layer (Layer 2) of the OSI reference model.
devices that reside on separate LAN segments or collision domains. Bridges are
protocol-independent, but hardware-specific, with communication limited to the
data link layer (Layer 1) and physical layer (Layer 2) of the OSI reference model.
bus topology
A network architecture that has all of its nodes connected to a single cable. A
star-wired topology is usually preferred over a bus topology.
star-wired topology is usually preferred over a bus topology.
campus network
A LAN that consists of several smaller LANs within and between buildings.
client/server
A single-user computer that requests application or network services from a server.
CoS
Class of Service. A process which differentiates traffic into eight numbered classes
and assigns priorities to those classes. Some network devices can read those
priorities and process traffic in accordance with those priorities.
and assigns priorities to those classes. Some network devices can read those
priorities and process traffic in accordance with those priorities.
collision
Overlapping transmission of two or more Ethernet nodes onto media. All data is
unusable. Both cease transmitting and restart at random intervals.
unusable. Both cease transmitting and restart at random intervals.
connectionless
communications
A form of packet-switching that relies on global addresses in each packet rather
than on predefined virtual circuits.
than on predefined virtual circuits.
connection-oriented
communications
A form of packet-switching that requires a predefined circuit from source to
destination to be established before data can be transferred.
destination to be established before data can be transferred.