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

[Antonio Prado]

On 5/21/16 9:00 PM, Abigail Bianconi wrote:
> provo a risolvere l'esercizio. Avevo provato a leggere la Rfc ma non mi
> aveva chiarito molto le idee. Grazie al tuo articolo ho compreso i
> passaggi, anche se ancora ho delle difficoltà nel determinare le reti
> contigue.
> 
> ###########################
> 1.
> Addr 0. 1. 2. 3
> Mask 255.255.0.0
> 
> Net 0.1.0.0
> Broadcast 0.1.255.255
> Hosts 2^16-2=65534
> ###########################
ok

> ###########################
> 2.
> Addr 0. 1. 2. 3
> Mask 255.254.0.0
> 
> Net 0.0.0.0
> Broadcast 0.1.255.255
> Hosts 2^17-2=131070
> ###########################
ok

> ###########################
> 3.
> Addr 0. 1. 2. 3
> Mask 254.0.0.0
> 
> Net 0.0.0.0
> Broadcast 1.255.255.255
> Hosts 2^25-2=33554430
> ###########################
ok

> ###########################
> 4.
> Addr 0. 1. 2. 3
> Mask 192.0.0.0
> 
> Net 0.0.0.0
> Broadcast 63.255.255.255
> Hosts 2^30-2=1073741822
> ###########################
ok

> ###########################
> 5.
> Addr 0. 1. 2. 3
> Mask 240.0.0.0
> 
> Net 0.0.0.0
> Broadcast 15.255.255.255
> Hosts 2^28-2=268435454
> ###########################

ok

> ###########################
> 6.
> Addr 0. 1. 2. 3
> Mask 255.255.255.240
> 
> Net 0.1.2.0
> Broadcast 0.1.2.15
> Hosts 2^4-2=14
> ###########################

ok

> ###########################
> 7.
> Addr 0. 1. 2. 3
> Mask 255.255.255.252
> 
> Net 0.1.2.0
> Broadcast 0.1.2.3
> Hosts 2^2-2=2
> ###########################

ok

> ###########################
> 8.
> Addr 0. 1. 2. 3
> Mask 255.255.255.1
> 
> Net 0.1.2.1
> Broadcast 0.1.2.255
> Hosts 2^8-2=254
ko, correggi ^^^^^

> ###########################
> 9.
> Addr 0. 1. 2. 3
> Mask 255.255.64.0
> 
> Net 0.1.0.0
> Broadcast 0.1.191.255
> Hosts 2^16-2=65534
ko, correggi ^^^^^

> ###########################
> 10.
> Addr 0. 1. 2. 3
> Mask 255.255.0.255
> Net 0.1.0.3
> Broadcast 0.1.253.0
> Hosts 2^8-2=254
> ###########################

ko

ottimo inizio, ora correggi

ciao
--
antonio

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