route und subnetz

[Christoph Schnauß]

hallo,

Im Gegensatz zu den IP-Adressen, von denen es zum Glück doch ein paar Millionen gibt, gibt es an Netzmasken nämlich allerhöchstens 32 Stück.

Konkret:

Here's a table showing the relationship between the / notation, the byte
notation, and the corresponding binary numbers (with a dot every eight
digits) for the 32 bit addresses.  I've thrown in a count of how many
Class A/B/C networks the larger networks encompass.

/ Notation   Binary                               Byte Notation  #Class
----------   -----------------------------------  -------------- ------
/0           00000000.00000000.00000000.00000000  0.0.0.0         256 A
/1           10000000.00000000.00000000.00000000  128.0.0.0       128 A
/2           11000000.00000000.00000000.00000000  192.0.0.0        64 A
/3           11100000.00000000.00000000.00000000  224.0.0.0        32 A
/4           11110000.00000000.00000000.00000000  240.0.0.0        16 A
/5           11111000.00000000.00000000.00000000  248.0.0.0         8 A
/6           11111100.00000000.00000000.00000000  252.0.0.0         4 A
/7           11111110.00000000.00000000.00000000  254.0.0.0         2 A
/8           11111111.00000000.00000000.00000000  255.0.0.0         1 A
/9           11111111.10000000.00000000.00000000  255.128.0.0     128 B
/10          11111111.11000000.00000000.00000000  255.192.0.0      64 B
/11          11111111.11100000.00000000.00000000  255.224.0.0      32 B
/12          11111111.11110000.00000000.00000000  255.240.0.0      16 B
/13          11111111.11111000.00000000.00000000  255.248.0.0       8 B
/14          11111111.11111100.00000000.00000000  255.252.0.0       4 B
/15          11111111.11111110.00000000.00000000  255.254.0.0       2 B
/16          11111111.11111111.00000000.00000000  255.255.0.0       1 B
/17          11111111.11111111.10000000.00000000  255.255.128.0   128 C
/18          11111111.11111111.11000000.00000000  255.255.192.0    64 C
/19          11111111.11111111.11100000.00000000  255.255.224.0    32 C
/20          11111111.11111111.11110000.00000000  255.255.240.0    16 C
/21          11111111.11111111.11111000.00000000  255.255.248.0     8 C
/22          11111111.11111111.11111100.00000000  255.255.252.0     4 C
/23          11111111.11111111.11111110.00000000  255.255.254.0     2 C
/24          11111111.11111111.11111111.00000000  255.255.255.0     1 C
/25          11111111.11111111.11111111.10000000  255.255.255.128
/26          11111111.11111111.11111111.11000000  255.255.255.192
/27          11111111.11111111.11111111.11100000  255.255.255.224
/28          11111111.11111111.11111111.11110000  255.255.255.240
/29          11111111.11111111.11111111.11111000  255.255.255.248
/30          11111111.11111111.11111111.11111100  255.255.255.252
/31          11111111.11111111.11111111.11111110  255.255.255.254
/32          11111111.11111111.11111111.11111111  255.255.255.255

Ich weiß allerdings nicht mehr, wo ich mir das mal abgeschrieben habe.

Grüße aus Berlin

Christoph S.