IPv6 prefix question

In Wendall Odom's book he states that Global Unicast addresses start with 2000::/3 meaning that it could be either 2000 or 3000. Is my understanding correct below?

0010
or
0011

Is the reason it could be 2 or 3? If that is correct then link local addresses are FE80::/10 which means:

1111(F)1110(E)10(eight...stupid smileys) which is the /10. Does that mean I can use the remaining two bits to get 1001 (9) 1010 (A) 1011 (B)?

I'm pretty sure I answered my own question but I'm just making sure.

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Comments

jscimeca715

Another question, and one that I probably won't get an answer to due to NDA...but do you think learning all the RFC numbers is important for ICND2? I don't remember them being important on ICND1 and can't see them being important on the ICND2. Appreciate it.

blackninja

jscimeca715 wrote: »

Another question, and one that I probably won't get an answer to due to NDA...but do you think learning all the RFC numbers is important for ICND2? I don't remember them being important on ICND1 and can't see them being important on the ICND2. Appreciate it.

I think the only RFC you need to remember is for the private addressing scheme (RFC 1918 ).

Can't remember seeing any other in Odom's books.

jscimeca715

Thanks blackninja, that's the only one I remember! There are a few other's mentioned but they are in passing.