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Which of the following statements are correct regarding subnet mask $255.255.240.0?$
i. Class A network subnet mask$: 4096$ subnets and $4096$ systems per subnetwork
ii. Class B network subnet mask$: 16$ subnets and $4096$ systems per subnetwork
iii. Class C network subnet mask$: 1$ subnet and $ 256$ systems per subnetwork

  1.  All are correct
  2. i, ii
  3. i, iii
  4. ii, iii
asked in Computer Networks by Active (1.2k points)
edited by | 107 views
0
$B?$
0
It should be

1) 4096 Subnets and 4094 system assignable IP, whereas 2 are not system assignable because 1 is ID and Other is broadcast address over the subnet.

2) 16 subnets and 4094 system assignable IP, whereas 2 are not system assignable because 1 is ID and Other is broadcast address over the subnet.

3) In class C above mask i.e. $255.255.240.0$ will act as a supernet mask.
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how can it be 4096 subnet in class A here first 8 bits will be for the network id and last 11 bits will be for subnet id and from 11 bits we only able to form 2^11=2048 subnets

correct me if  m wrong here??
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First 8 bit for network

second octet 8 bits + third octet 4 bit

= 12 bit. And with 12bits u have 4096 subnets.
0
oh sorry silly mistake i thought it is 224 instead of 240 well thank you

1 Answer

0 votes
I think ans is (A)
answered by (67 points)

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