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Describe Physical Infrastrucure Connection Of Wlan Component. 2.7

 

THE PHYSICAL INFRASTRUCTURE CONNECTIONS OF WLAN COMPONENTS REFER TO THE PHYSICAL CONNECTIONS BETWEEN VARIOUS COMPONENTS OF A WIRELESS LOCAL AREA NETWORK (WLAN), INCLUDING ACCESS POINTS (APS), WIRELESS LAN CONTROLLERS (WLCS), ACCESS AND TRUNK PORTS, AND LINK AGGREGATION (LAG).

ACCESS POINTS (APS)

ARE THE MAIN COMPONENTS THAT PROVIDE WIRELESS ACCESS TO THE NETWORK. THEY CAN BE CONNECTED TO THE NETWORK THROUGH EITHER A WIRED ETHERNET CONNECTION OR A WIRELESS CONNECTION TO A NEARBY AP. WHEN CONNECTED TO THE NETWORK WIRED, AN AP IS TYPICALLY CONNECTED TO A SWITCH PORT IN ACCESS MODE. THIS MEANS THAT THE AP IS ONLY CONNECTED TO A SINGLE VLAN AND CAN ONLY COMMUNICATE WITH DEVICES THAT ARE ALSO ON THAT VLAN.

WIRELESS LAN CONTROLLERS (WLCS)

 ARE CENTRAL COMPONENTS IN A WLAN THAT PROVIDE MANAGEMENT AND CONTROL FOR CONNECTED APS. THEY ARE TYPICALLY CONNECTED TO THE NETWORK THROUGH A WIRED ETHERNET CONNECTION. A WLC CAN BE CONNECTED TO A SWITCH PORT IN EITHER ACCESS MODE OR TRUNK MODE. IF THE WLC IS CONNECTED TO A SWITCH PORT IN ACCESS MODE, THEN IT CAN ONLY COMMUNICATE WITH APS THAT ARE ALSO ON THE SAME VLAN. IF THE WLC IS CONNECTED TO A SWITCH PORT IN TRUNK MODE, THEN IT CAN COMMUNICATE WITH APS THAT ARE ON ANY VLAN.

ACCESS PORTS

ACCESS PORT ARE SWITCH PORTS THAT PROVIDE A DIRECT CONNECTION BETWEEN A SWITCH AND AN END DEVICE, SUCH AS A LAPTOP OR DESKTOP COMPUTER. ACCESS PORTS ARE TYPICALLY CONFIGURED AS UNTAGGED MEMBERS OF A SINGLE VLAN. THIS MEANS THAT ALL TRAFFIC THAT PASSES THROUGH AN ACCESS PORT IS ASSIGNED TO THE VLAN THAT THE PORT IS A MEMBER OF.

TRUNK PORTS

TRUNK PORTS  ARE SWITCH PORTS THAT PROVIDE A CONNECTION BETWEEN SWITCHES AND SUPPORT THE TAGGING OF MULTIPLE VLANS. TRUNK PORTS ARE USED TO CONNECT APS TO SWITCHES AND WLCS. WHEN AN AP IS CONNECTED TO A TRUNK PORT, IT CAN COMMUNICATE WITH DEVICES THAT ARE ON ANY VLAN THAT IS TAGGED ON THE TRUNK PORT.

LINK AGGREGATION (LAG)

LINK AGGREGATION  IS A TECHNIQUE THAT CAN BE USED TO COMBINE MULTIPLE PHYSICAL PORTS INTO A SINGLE LOGICAL PORT. THIS CAN BE USED TO INCREASE THE BANDWIDTH BETWEEN TWO DEVICES, OR TO PROVIDE REDUNDANCY IN CASE ONE OF THE PHYSICAL PORTS FAILS. LAG IS OFTEN USED TO CONNECT APS TO SWITCHES AND WLCS.

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