Adrian
Z.
IT Project Manager &
PHP Programmer
Maciej Natan
Milaszewski
Kierownik dzialu IT
/ sys administrator
Adrian
Z.
IT Project Manager &
PHP Programmer
konto usunięte
Where possible, name servers should provide case-insensitive comparisons
for inverse queries. Thus an inverse query asking for an MX RR of
"Venera.isi.edu" should get the same response as a query for
"VENERA.ISI.EDU"; an inverse query for HINFO RR "IBM-PC UNIX" should
produce the same result as an inverse query for "IBM-pc unix". However,
this cannot be guaranteed because name servers may possess RRs that
contain character strings but the name server does not know that the
data is character.
Domain names in messages are expressed in terms of a sequence of labels.
Each label is represented as a one octet length field followed by that
number of octets. Since every domain name ends with the null label of
the root, a domain name is terminated by a length byte of zero. The
high order two bits of every length octet must be zero, and the
remaining six bits of the length field limit the label to 63 octets or
less.
To simplify implementations, the total length of a domain name (i.e.,
label octets and label length octets) is restricted to 255 octets or
less.
Although labels can contain any 8 bit values in octets that make up a
label, it is strongly recommended that labels follow the preferred
syntax described elsewhere in this memo, which is compatible with
existing host naming conventions. Name servers and resolvers must
compare labels in a case-insensitive manner (i.e., A=a), assuming ASCII
with zero parity. Non-alphabetic codes must match exactly.
konto usunięte
Wojciech
K.
realizator pomysłów
własnych
Adrian Zdziechowicz:
Czyli czy da się zrobić to w sposób automatyczny , aby serwer
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