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Thank you so much for your fast reply. just one more question, do you think the following device is good for wireless CCNP ?<br />
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Cisco AIR-WLC2106-K9 V05 2100 Series Wireless Lan Controller
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Thank you so much for your fast reply. just one more question, do you think the following device is good for wireless CCNP ?

Cisco AIR-WLC2106-K9 V05 2100 Series Wireless Lan Controller

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2106 is OK too. &nbsp;It'll do what you need for the CCNP but it usually costs more than a 4402.
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2106 is OK too.  It'll do what you need for the CCNP but it usually costs more than a 4402.

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Hi I want to set up wireless lab for CCNP. Any expert can give me answer regarding Cisco wireless lab minimum WLC ? <br />
How about this one -- Cisco AIR-WLC4402-50-K9 Wireless LAN Controller ? What that K9 mean in the device name ? <br />
Thank you
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Hi I want to set up wireless lab for CCNP. Any expert can give me answer regarding Cisco wireless lab minimum WLC ? 
How about this one -- Cisco AIR-WLC4402-50-K9 Wireless LAN Controller ? What that K9 mean in the device name ? 
Thank you

set up wireless lab for its CCNP.

Wireless networking is a method by which homes, telecommunications networks and enterprise (business) installations avoid the costly process of introducing cables into a building, or as a connection between various equipment locations. Wireless telecommunications networks are generally implemented and administered using radio communication. This implementation takes place at the physical level (layer) of the OSI model network structure. The key hardware components of a wireless computer network include adapters, routers and access points, antennas and repeaters.

Wireless Hardware

Wireless networking is anything related to the transfer of data between two (or more) devices without the use of a physical connection, ranging from getting advice on a new Bluetooth headset to configuring sophisticated enterprise level networks.