Netgear 7200 Series Layer 2 Managed Switch Software User Manual Page 134

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User Manual for the NETGEAR 7200 Series Layer 2 Managed Switch Software
B-2 Glossary
202-10010-01
100BASE-TX
The IEEE specification for 100 Mbps Fast Ethernet over Category 5 twisted-pair cable.
1000BASE-SX
The IEEE specification for 1000 Mbps Gigabit Ethernet over fiber-optic cable.
1000BASE-T
The IEEE specification for 1000 Mbps Gigabit Ethernet over Category 5 twisted-pair cable.
gain access.
A
Aging
When an entry for a node is added to the lookup table of a switch, it is given a timestamp. Each time a packet
is received from a node, the timestamp is updated. The switch has a user-configurable timer that erases the
entry after a certain length of time with no activity from that node.
Auto-negotiation
A feature that allows twisted-pair ports to advertise their capabilities for speed, duplex and flow control.
When connected to a port that also supports auto-negotiation, the link can automatically configure itself to
the optimum setup.
Auto Uplink
Auto Uplink
TM
technology (also called MDI/MDIX) eliminates the need to worry about crossover vs.
straight-through Ethernet cables. Auto Uplink
TM
will accommodate either type of cable to make the right
connection.
AVL tree
Binary tree having the property that for any node in the tree, the difference in height between the left and
right subtrees of that node is no more than 1.
B
BPDU
See “Bridge Protocol Data Unit” on page 3.
Bandwidth
The information capacity, measured in bits per second, that a channel could transmit. Bandwidth examples
include 10 Mbps for Ethernet, 100 Mbps for Fast Ethernet, and 1000 Mbps (I Gbps) for Gigabit Ethernet.
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