příznak

06:51 Sep 15, 2012 

... as much as 3 bits to describe (r hacek etc.), because they are not latin based.
I also looked through
http://en.wikipedia.org/wiki/IP_address#IP_address_assignmen...
and there was no mention of tags or flags.

06:50 Sep 15, 2012 

hey Vladimír Hoffman, I don't think that is a backward translation at all, the post you mentioned, because that has to do with mail, while this has to do with IP addresses.
According to
http://www.thegeekstuff.com/2012/05/route-flags/
flags are like a mark added to something which gives it a certain meaning. Such as:
-----
The flags

Following is the list of flags and their significance in the routing table :

U : This flag signifies that the route is up
G : This flag signifies that the route is to a gateway. If this flag is not present then we can say that the route is to a directly connected destination
H : This flag signifies that the route is to a host which means that the destination is a complete host address. If this flag is not present then it can be assumed that the route is to a network and destination would be a network address.
D : This flag signifies that this route is created by a redirect.
M : This flag signifies that this route is modified by a redirect.
----

http://www.daemon.org/ip.html
might give greater insight, referring to those characters as bits. After all, a character or a digit equals one bit, if latin character, but Czech characters can take...