AirLive SNMP-24MGB - Manual (Page 322)

8. Network Glossary
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AirLive SNMP-24MGB User’s Manual
speed, and is backward compatible with 10/100Base-TX standard.
802.1d STP
Spanning Tree Protocol. It is an algorithm to prevent network from loop topology. Spanning
tree allows a network design to include spare (redundant) links to provide automatic backup
paths if an active link fails, without the danger of bridge loops, or the need for manual
enabling/disabling of these backup links. Bridge loop must be avoided because of flooding
issue in the network.
802.1Q Tag VLAN
In 802.1Q VLAN, the VLAN information is written into the Ethernet packet itself. Each
packet carries a VLAN ID(called Tag) as it traveled across the network. Therefore, the
VLAN configuration can be configured across multiple switches. In 802.1Q spec, possible
4096 VLAN ID can be created. Although for some devices, they can only view in frames
of 256 ID at a time.
802.1x
802.1x is a security standard for wired and wireless LANs. In the 802.1x parlance, there are
usually supplicants (client), authenticator (switch or AP), and authentication server (radius
server) in the network. When a supplicants request a service, the authenticator will pass
the request and wait for the authentication server to grant access and register accounting.
The 802.1x is the most widely used method of authentication by WISP.
802.1w
Rapid Spanning Tree Protocol. It is a refinement of STP, which provides faster spanning
tree convergence after a topology change. While STP can take 30 or 50 seconds to
respond to a topology change, RSTP is typically able to respond to changes within a
second.
DHCP
Dynamic Hosting Configuration Protocol. A protocol that enables a server to dynamically
assign IP addresses. When DHCP is used, whenever a computer logs onto the network, it
automatically gets an IP address assigned by DHCP server. A DHCP server can either be a
designed PC on the network or another network device, such as a router.