CCNA - Capitulo 12

CCNA - Capitulo 12

1. ADDRESSING IPV6

   • IPV4 ISSUES
     • DEPLETION OF IPV4 ADDRESS
     • NAT
   • NEW FEATURES INTRODUCED
     • 128 BITS
     • ICMPv6
       • ADDRESS RESOLUTION (ND)
       • SLAAC
     • END TO END MODEL
   • INTERNET OF THINGS
     • POSSIBILITY OF ADDRESSING WITHOUT SUFFERING FROM A LACK OF ADDRESSES
   • THREE CATEGORIES
     • DUAL STACK
       • BOOT IPV4 AND IPV6 STACKS SIMULTANEOSLY
       • NATIVE IPV6
       • CUSTOMER NETWORKS HAS AN IPV6 CONNECTION TO HEIR ISP
         • AND IS ABLE TO ACCESS CONTENT INTERNET OVER IPV6
     • TUNNELING
       • TRANSPORTING AN IPV6 PACKET OVER AN IPV4
       • IPV6 PACKET
         • ENCAPSULATED INSED IPV4 PACKET
     • TRANSLATION
       • AN IPV6 PACKET IS TRANSLATED TO AN IPV4 PACKET AND
       • NETWORK ADDRESS TRANSLATION 64 (NAT 64 )
       • AN IPV4 PACKET IS TRANSLATED TO AN IPV6 PACKET.
     • IPV4 AND IPV4 COEXISTENCE
       • TECHNIQUES HELP MIGRATE

2. ADDRESS REPRESENTATION

   • PREFERRED FORMAT
     • HEXTET
       • 2001 : 0db8 : 0000 : 1111 : 0000 : 0000 : 0000: 0200
         • x: x: x: x: x: x: x: x: x,
           • EACH "X" IS SINGLE HEXTET WHICH 16 BITS OUR FOUR HEXADECIMAL DIGITS
             • TOTAL 32 HEXADECIMAL VALUES
   • RULE 1 - OMIT LEADING ZEROS
     • OMIT ANY LEADING 0s IN ANY HEXTET
       • EX : 00AB > AB
       • EX : 0A00 > A00
       • OBS : NOT TO TRAILING Os
   • 2) DOUBLE COLON (::)
     • CAN ONLY BE USED ONCE WITHIN AN ADDRESS
       • INCORRECT : 2001:DB8::ABCD::1234
     • 16-bit HEXTETS CONSISTING OF ALL ZEROS
       • EX : 2001:DB8:CAFE:1:0:0:0:1
         • 2001:DB8:CAFE:1::1
     • USED IN CONJUNCTION WITH THE OMIT LEADING ZEROS TECHNIQUE.
     • ADDRESS HAS MORE CONTIGUOES STRING OF ALL-0 STRINGS ?
       • USE THE DOUBLE COLLON (::) THE LONGEST STRING
       • IF THE STRINGS ARE EQUAL ? USE THE FIRST STRING