HP T1453-90001 Manual do Utilizador descarregar pdf (Página 77)

Glossary

VPPA:

Glossary 77

Virtual PPA or VPPA: Virtual Interfaces

which are dynamically created by you (using

lanadmin or SAM). The interfaces are

“virtual” because they do not have a unique

hardware instance. A virtual PPA is the PPA

associated with a VLAN.

VLAN: Virtual LAN.VLANs, are a

mechanism to determine which end stations

should receive broadcast trafﬁc, since it

should not be sent arbitrarily to every

connected user. Each packet transmitted by

an end-station is assigned to a VLAN. An

end-station only receives all the multicast

and broadcast trafﬁc on theLANs to which it

belongs, and an end-station receives unicast

trafﬁc addressed to it on the VLAN to which

it belongs.

VLAN-aware: Devices such as switches and

end-stations that can recognize VLAN tags,

but they do not actually interpret them. See

also tag-aware.

VLAN ID: A VLAN ID uniquely identiﬁes

the VLAN to which a frame belongs.

VLAN tag: A 4-byte extension to the MAC

header consisting of a 2-byte VLAN protocol

ID (0x8100) and 2-bytes of tag control

information. VLAN tags enable trafﬁc from

more than one VLAN to use the same port.

VPPA: see Virtual PPA.

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