CCNA 3 - Capitulo 7.6

CCNA 3 - Capitulo 7.6

1. WAN CONCEPTS

   • MORDERN WAN CONNECTIVITY
     • 3 - INTERNET BASED
       • BROADBAND VPN
         • VPN TECNOLOGY
           • SEVERAL BENEFITS TO USING VPN
             • COST SAVINGS
               • ORGANIZATION TO USE GLOBAL INTERNET TO CONENCT REMOTE OFFICES
               • ELIMINATES DEDICATED WANs SUCH MPLS
             • SECURITY
               • ENCRYPT AND AUTHETICATION
             • SCALABILITY
             • COMPABILITY WITH
               • BROADBAND TECHNOLOGY SUCH DSL AND CABLE
           • ARE IMPLEMENTED AS THE FOLLOWIG
             • SITO TO SITE
               • VPN SETTING ARE CONFIGURED ON ROUTERS
             • REMOTE ACCESS
               • VPN CLIENT SOFTWARE OR USING HTPS IN A BROWSER
           • WHATS IS VPN ?
             • ENCRYPTED CONNECTION BETWEEN PRIVATE NETWORKS OVER A PUBLIC NETWORK SUCH AS THE INTERNET
           • INSTEAD OF USING A DEDICATED LAYER 2 SUCH LEASE LINE
             • VPN USES VIRTUAL CONNECTIONS CALLED VPN TUNNELS
         • ISP CONNECTIVITY OPTIONS
           • SINGLE HOMED
             • ORGANIZATION CONNECT ONLY ISP
           • DUAL HOMED
             • ORGANIZATION CONNECT SAME ISP , BUT USING
               • TWO LINKS SAME ISP
             • PROVIDES REDUNDACY AND LOAD BALANCING
               • BUT, IF ISP FAILS , ORGANIZATION LOSES INTERNET
           • MULTI HOMED
             • ORGANIZATION CONNECT TWO DIFFERENTES ISPs
               • ONE LINK - ISP1
               • SECOND LINK - ISP2
             • PROVIDES REDUNDACY AND LOAD BALANCING
           • DUAL MULTIHOMED
             • MOST RESILIENCY AND HIGH COST
             • ORGANIZATION CONNECT TWO DIFFERENTES ISPs WITCH TWO LINKS
               • TWO LINKS - 1 ISP
               • TWO LINKS - ISP 2
         • BROADBAND VPN
           • WIRELESS OPTIONS
             • WIFI MUNICIPAL
               • FREE OR SUBSTANTIALLY LESS THAN PRICE BROADBAND
               • SUBCRIVER NEEDS A WIRELESS WHICH STRONGER RADIO
               • DISADVANTAGE ?
                 • HIGH COST ; LIMITED CAPACITY PER SUBSCRIBER
             • CELULLAR
               • DEVICES USE RADIO WAVES TO COMMUNICATE MOBILE PHONE TOWER
               • 3G GENERATION
               • LONG TERM EVOLUTION (LTE)
                 • IS PART FOR FOURTH GENERATION 4G TECHNOLOGY
               • 4G GENERATION
                 • 450 DOWN / 100 UPSTREAM
               • 5G GENERATION
                 • 100 Mbps TO 10 GBPS
             • SATELITE INTENET
               • RURAL USERS OR REMOTE LOCATIONS WHERE CABLE AND SAL ARE NOT AVAILABLE
               • SUBCRIBER NEED A SATELITE DISH , TWO MODENS , AND COAXIAL CABLES
               • ANTENNA TO HAVE A CLEAR VIEW
             • WIMAX (802.16)
               • HIGH SPEED
               • OPERATE SIMILAR WIFI , BUT AT HIGHER SPEED , OVER DISTANCE , AND GREATER NUMBER OF USERS
               • UTILIZES WIMAX TOWER THAT ARE LIKE CELL PHONE TOWERS
               • USERS MUST SUBCRIBER TO AN ISP
             • CAN BE NEGATIVELY AFFECTED BY OTHER FACTORS SUCH
               • DISTANCE
               • INTERFERENCE
               • NUMBER OS USERS ACESSING THE SHARED SPACE
         • THE CONNECTIVITY OPTIONS ARE COMBINED WITH VPN TECHNOLOGIES