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Re: [TEKNIK] Offentlig IP-adresse s om ender på .255 eller .0 og som ha r en webserver kørende



Well, jeg tænker at han snakker om netværks adresser og broadcast
adresser, men definitionen er ikke korrekt.

I netværks adressen er alle bits i host delen af adressen 0. Hvis man
har en /24 adresse er det altså de sidste 8 bits, men har man en /16
adresse er et de sidste 16 bits.

Broadcast adressen er omvendt. Der er alle bits i host delen 1.

Sender man til broadcast adressen så skal routeren/switchen sende
pakkerne til ALLE hosts på nettet, og netværksadressen tilhører nettet.

Så du har ret...på et /24 netværk kan man ikke assigne adresserne
x.y.z.0 og x.y.z.255 til hosts, men det kan man på et /23 eller derunder.

Men jeg kender desværre ikke lige til nogen, som har assignet en sådan
adresse til noget :-(
Men du kan måske bruge denne:
http://en.wikipedia.org/wiki/IPv4#Addresses_ending_in_0_or_255


 
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