User`s manual

In-Band
A connection to the Switch directly through the RS232C port. Accessing the
Switch through a terminal or workstation, or modem directly connected to the
serial port. See out-of-band.
Intelligent Switch
A routing switch; a switch that uses Layer 3 information to maintain routing tables
and perform routing functions.
IP
Internet Protocol; a connectionless routing service that makes it possible to
encapsulate addressing information, fragment and reassemble packets to route
packets across different networks.
ISO
International Standards Organization
Jabber
An Ethernet packet that is invalid because it is too long, greater than 1518 bytes.
The Switch discards all jabbers.
Jitter
A flickering signal caused by packet transmission delays
Latency
Any delay introduced into the network that prevents packet forwarding at wire
speed
LAN
Local area network; a network where computers are connected in close
proximity, such as in the same building or office park; a system of LANs
connected at a distance is called a wide-area network (WAN)
Layer 1
The first, or physical, layer of the OSI model. Delivers data across a network link.
This layer must regulate signaling and keep the signal strong. Hubs, repeaters
and concentrators operate at Layer One. All packets received are forwarded over
the wire.
Layer 2
The second, or data link layer, of the OSI model. The MAC layer. Transmits
packets across a Layer 1 physical link by reading the hardware or MAC source
and destination addresses in each packet. Switches operate at Layer 2. Switches
have a forwarding table of the hardware addresses of the devices connected to
them. When packets arrive, the Switch reads the Layer 2 address and if it
matches one in the table, forwards it to that port. Otherwise, it forwards or
"floods" the packet to all ports.
Layer 3
The third, or routing, layer of the OSI model. The network layer. Forwards
packets to destinations beyond a switch.
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