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Home > Archive > Unix administration > January 2004 > Network mask 255.255.255.255
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Network mask 255.255.255.255
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| Mishka 2004-01-23, 4:29 pm |
| Greetings!
Anybody knows what is a meaning of netmask 0xffffffff?
Is it have an any sense?
Lets assume we have configured some (and single) network interface:
IP - 192.168.1.1, netmask - 255.255.255.255.
So my questions are:
1) can I access any host via network interface configured in such manner?
2) can I create (and how) the route entry to, for examle, 172.16.1.0 LAN?
3) it is possible create any route entry VIA 172.16.0.1 host?
4) are all above will works in real life?
Any ideas would be appreciated.
--
TIA, Mishka.
P.S. Excuse me for possible offtopic and crossposts.
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| Rob MacGregor 2004-01-23, 4:29 pm |
| Mishka wrote:
quote:
> Greetings!
Hmmm, crossposted to half the universe. Sure you couldn't have found a
few more groups?
quote:
> Anybody knows what is a meaning of netmask 0xffffffff?
> Is it have an any sense?
Nope, it says that every bit is the network address and there is no host
address. The longest usable netmask is a /30, giving 2 IPs (plus the
network address and broadcast address).
quote:
> Lets assume we have configured some (and single) network interface:
> IP - 192.168.1.1, netmask - 255.255.255.255.
Then lets assume you don't have a network :-)
quote:
> So my questions are:
> 1) can I access any host via network interface configured in such manner?
I'd hope not, or you've got a broken OS (IMHO).
quote:
> 2) can I create (and how) the route entry to, for examle, 172.16.1.0 LAN?
Nope.
quote:
> 3) it is possible create any route entry VIA 172.16.0.1 host?
Nope.
quote:
> 4) are all above will works in real life?
Nope.
--
Rob MacGregor (BOFH) Oh my God! They killed init! You bastards!
The light at the end of the tunnel is an oncoming dragon.
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