sw1 (hub) .
A, B C. :
MAC- | |
A | |
B | |
C |
A B, forwarding, .
D. A D, unknown unicast , MAC- D. flooding , 1 ( ).
D, .
. :
MAC- | |
A | |
B | |
C | |
D | |
E | |
F |
E F, , . filtering, MAC- , .
. :
. , . . VLAN , .
-. - Vlan - ( , ). , , .
() Ethernet. ieee 802.1q. Ethernet , Vlan, ( , 12 4096 Vlan, ).
VLAN:
1. VLAN' ;
2. VLAN' , , , , 802.1X. 802.1X , RADIUS-. VLANe (: 802.1X RADIUS).
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27
STP ( Spanning Tree Protocol)- , OSI. STP Ethernet , . .
:
1. .
2. , , . . .
3. . , , . - .
4. , . ( ) .
-Rootguard = ; - bridge ID= +MAC; cost = , 2 15
: Root() Port, Designated() Port, Non-designated Port, Disabled() Port
VTP ( VLAN Trunking protocol ) , VLAN ( ), . Cisco. VTP VLAN.
VTP . VTP , 2- , VLAN . , VTP , . VTP ISL IEEE 802.1Q.