CCNA - Capitulo 8.3

CCNA - Capitulo 8.3

1. INTERNET LAYER

   • IPV6 - 8 FIELDS - HEADER
     • VERSION (6bits)
       • 6 (0110)
     • TRAFFIC CLASS (8 bits or 1 BITE )
       • EQUIVALENT DS IPV4
         • QOS
     • FLOW LABEL (20 bits)
       • REAL-TIME E APPLICATIONS , STREAMING , AUDIO ,
       • ALL PACKETS THA SAME FLOW LABEL
         • TYPE OF HADLING
     • NEXT HEADER
       • PASS THE DATA
         • UPPER-LAYER PROTOCOL
           • INDICATES THAT THE PACKET IS CARRYING
       • EQUIVALENT PROTOCOL FIELD IPV4
     • HOP LIMIT
       • 0 ? TIME EXCEEDED
       • REPLACES IPV4 TTL FIELD
       • PROTOCOL USED ?
         • ICMPv6
     • SOUCE ADDRESS (128 bites or 16 BYTES )
       • ALWAYS UNICAST
     • PAYLOAD LENGHT (16bits)
       • LENGHT OF THE DATA PORTION OR PAYLOAD
       • THIS DOES NOT INCLUDE THE LENGHT IPV6 HEADER
     • EARLY 1990s
     • DESTINATION ADDRESS (128 bites or 16 BYTES )
       • UNICAST , MULTICAST , ANYCAST
     • IPV6 DOES NOT INCLUDE HEADER CHECKSUM ?
       • IS PERFORMED BOTH THE LOWER AND UPPER LAYER
       • DOES NOT NEED TO BE RECALCULATED BY EACH ROUTER
         • WHICH ALSO IMPROVES NETWORK PERFORMANCE
       • FRAGMENTATION IPV6 ALWAYS SOURCE EX : END DEVICES
       • FRAGMENTATION IS NOT PERFORMED BY ROUTERS.
     • HEADER FIXED 40 BYTES

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