[Internet-e-architetture-di-rete] esercizi VLSM IPv4

[Antonio Prado]

On 5/26/16 10:06 AM, Mauro Torresi wrote:
> 8.
> Addr      129.130.131.132
> Mask    255.255.255.  1
> Calcolo la Rete
> Addr 10000001.10000010.10000011.10000100  AND
> Mask 11111111.11111111.11111111.00000001
> ----------------------------------------
> ID   10000001.10000010.10000011.00000000 = 129.130.131.0
> 
> Calcolo l'indirizzo di Broadcast
> Inverto la Netmask
> ISM: 00000000.00000000.00000000.11111110
> Faccio lo XOR tra ID e ISM
> ID   10000001.10000010.10000011.00000000 XOR
> ISM: 00000000.00000000.00000000.11111110
> ----------------------------------------
> BA:  10000001.10000010.10000011.11111110 = 129.130.131.254
> 
> Calcolo il numero di hosts
> (2^7)-2= [(2^8)/2]-2 = 126
> ###########################


bravissimo, grazie
--
antonio

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