CCNA 2 - Capitulo 12.2

CCNA 2 - Capitulo 12.2

1. WLAN COMPONENTES

   • WIRELESS NICs
     • WIRELESS DEPLOYMENTS REQUIRE
       • 1 ) END DEVICE WITH WIRELESS NIC
       • 2 ) NETWORK DEVICE ( WIRELESS ROUTER OR WIRELESS AP
     • LAPTOPS , TABLETS , SMARTPHONES INCLUDES
       • NICs THAT INCORPORATE A RADIO
         • TRANSMITTER
         • RECEIVER
     • USB WIRELESS ADPTER CAN BE USED ALSO
   • WIRELESS HOME ROUTER
     • 1 - ADVERTISES ITS WIRELESS SERVICES ?
       • BY SENDING BEACONS CONTAINING
         • SHARED SERVICE SET IDENTIFIER (SSID)
     • WIRELESS ROUTER SERVER AS AN
       • ACCESS POINT
         • PROVIDES
           • IEEE 802.11 A,B,G,N,AC WIRELESS ACCESS
       • SWITCH
         • THIS PROVIDES
           • WIRED INTERCONNECT (10/100/1000)
       • ROUTER
         • DEFAULT GATEWAY
           • CONNECTING AS THE INTERNET
     • SMALL BUSINESS OR RESIDENTIAL
     • 2 - DEVICES WIRELESSLY DISCOVER SSID AND ATTEMPT TO ASSOCIATE AND AUTHENTICATE
     • CAN IMPLEMENT WIFI RANGE EXTENDERS
   • WIRELESS ACCESS POINS
     • AP CATEGORIES
       • AUTONOMOUS APs
         • CLI OR GRAPHICAL
           • EX : WIRELESS HOME ROUTER
         • OPERATE INDEPENDENT OF OTHER APS (STANDALONE)
           • EACH AP WOULD RIQUERE MANUAL CONFIGURATON AND MANAGEMENT
       • CONTROLLER BASED APs
         • TREE COMPONENTS
           • LIGHTWEIGHT ACCESS POINT (LAPs)
             • EX : UNIFI
             • USES LWAPP / CAPWAPP TO COMMUNICATE WITH A WLAN CONTROLLER (WLC)
           • WLAN CONTROLLER (WLC)
             • EX : UNIFI CONTROLER
           • LIGHTWEIGHT ACCESS POINT PROTOCOL (LWAPP)
         • DON'T REQUIRES INITIAL CONFIGURATION
         • USEFUL WHERE MANY APS ARE REQUIRED
         • EACH AP IS AUTOMATICALLY CONFIGURED AND MANAGED BY THE WLC
         • CAUTION
           • 1 - THE INTERCONNECTION BETWEEN THE SWITCH AND THE WLC IS COMMONLY DONE VIA THE LAG PROTOCOL.
             • ALL PORTS SWITCH CONNECTED TO THE WLC NEED TO BE TRUNKING AND CONFIGURE ETHERCHANNEL
             • OBS : WLC DOES NOT SUPPORT PAGP OR LACP
           • 2 - LAG PROVIDES REDUNDANCY AND LOAD BALANCNG
     • WIRELESS CLIENTS USE THEIR WIRELESS NIC TO DISCOVER
       • APs ADVERTISING THEIR SSID
   • WIRELESS ANTENNAS
     • TYPES
       • OMNIDIRECTIONAL ANTENNAS
         • 360 GRAUS
         • HOUSE , OPEN OFFICE , CONFERENCE ROOMS , AND OUTSIDE AREAS
         • EX : ANTENNA OF NIC DESKTOP MOTHERBOARD OFFBOARD
       • DIRECTIONAL ANTENNAS
         • FOCUS SIGNAL IN
           • GIVEN DIRECITON
         • EX : YAGI & PARABOLIC DISH ANTENNAS
       • MIMO (MULTIPLE INPUT MULTIPLE OUTPUT) ANTENNAS
         • UP TO EIGHT ANTENNAS CAN BE USED
         • MULTIPLE ANTENNAS TO INCREASE AVAILABLE BANDWIDH
         • AVAILABLE FOR IEEE 802.11 N ; AC ; AX