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

[Mauro Torresi]

Buongiorno a tutti,
di seguito le mie risposte.
NOTA: ho utilizzato la calcolatrice per calcolare le potenze >= 16


 ###########################
 1.
 Addr      129.130.131.132
 Mask    255.255.  0.  0
 Net             129.130.0.0
 Broadcast       129.130.255.255
 Hosts           2^16-2=65534
 ###########################

 ###########################
 2.
 Addr      129.130.131.132
 Mask    255.254.  0.  0
 Net             129.130.0.0
 Broadcast       129.131.255.255
 Hosts           2^17-2= 131070
 ###########################

 ###########################
 3.
 Addr      129.130.131.132
 Mask    254.  0.  0.  0
 Net             128.0.0.0
 Broadcast       129.255.255.255
 Hosts           2^25-2= 33554430
 ###########################

 ###########################
 4.
 Addr      129.130.131.132
 Mask    192.  0.  0.  0
 Net             128.0.0.0
 Broadcast       191.255.255.255
 Hosts           2^30-2= 1073741822
 ###########################

 ###########################
 5.
 Addr      129.130.131.132
 Mask    240.  0.  0.  0
 Net             128.0.0.0
 Broadcast       143.255.255.255
 Hosts           2^28-2= 268435454
 ###########################

 ###########################
 6.
 Addr      129.130.131.132
 Mask    255.255.255.240
 Net             129.130.131.128
 Broadcast       129.130.131.143
 Hosts           2^4-2= 14
 ###########################

 ###########################
 7.
 Addr      129.130.131.132
 Mask    255.255.255.252
 Net             129.130.131.132
 Broadcast       129.130.131.135
 Hosts           2^2-2= 2
 ###########################

###########################
 8.
 Addr      129.130.131.132
 Mask    255.255.255.  1  Maschera Errata
 Net
 Broadcast
 Hosts
 ###########################

 ###########################
 9.
 Addr      129.130.131.132
 Mask    255.255. 64.  0  Maschera Errata
 Net
 Broadcast
 Hosts
 ###########################

 ###########################
10.
 Addr      129.130.131.132
 Mask    255.255.  0.255  Maschera Errata
 Net
 Broadcast
 Hosts
 ###########################


Il 20 maggio 2016 00:52, Antonio Prado via
Internet-e-architetture-di-rete
<internet-e-architetture-di-rete at list.informagiovani.comunesbt.it> ha
scritto:
> cari allievi,
>
> stasera abbiamo conversato degli spazi di indirizzamento IPv4 e IPv6:
> morfologia, notazione, subnetting.
>
> vi propongo ora qualche esercizio che mi raccomando di iniziare sin da
> subito finche' le idee sono fresche.
>
> dunque, come preannunciato, per ciascun indirizzo dato provate a
> calcolare inizio-rete, fine-rete e numero di host numerabili
> (considerato che in IPv4 non sono assegnabili agli host l'indirizzo di
> inizio rete e l'indirizzo di broadcast).
>
> faccio un esempio su come formattare l'esercizio:
>
> ###########################
> 1.
> Addr      1.  2.  3.  4
> Mask    255.255.255.  0
>
> Net             1.2.3.0
> Broadcast       1.2.3.255
> Hosts           2^8-2=254
> ###########################
>
> ecco gli esercizi:
>
> per i cognomi da A a L:
>
> A-L.
> Addr      0.  1.  2.  3
> Mask    255.255.  0.  0
> Mask    255.254.  0.  0
> Mask    254.  0.  0.  0
> Mask    192.  0.  0.  0
> Mask    240.  0.  0.  0
> Mask    255.255.255.240
> Mask    255.255.255.252
> Mask    255.255.255.  1
> Mask    255.255. 64.  0
> Mask    255.255.  0.255
>
> per i cognomi da M a Z:
>
> M-Z.
> Addr    129.130.131.132
> Mask    255.255.  0.  0
> Mask    255.254.  0.  0
> Mask    254.  0.  0.  0
> Mask    192.  0.  0.  0
> Mask    240.  0.  0.  0
> Mask    255.255.255.240
> Mask    255.255.255.252
> Mask    255.255.255.  1
> Mask    255.255. 64.  0
> Mask    255.255.  0.255
>
> ovviamente, come al solito, chiunque puo' partecipare alla
> soluzione/discussione
>
> grazie
> --
> antonio
>
>
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