Question
The formula below maybe of use sub = n + log 2 (N/N sub ) sub The new subnet mask n Original IP addresses block
The formula below maybe of use
sub = n + log2 (N/Nsub)
sub The new subnet mask
n Original IP addresses block mask
N Total number of IP addresses available in an assigned block
sub The number of addresses needed in a subnet
An organization is granted 175.17.10.0/20 block of addresses.
Find the total number of addresses in the block.
Translate the /20 mask into dotted decimal notation.
Find the FIRST and the LAST address in the assigned block (175.17.10.0/20).
Design the subnets as follows:
2 subnets with 100 addresses each
1 subnet with 64 addresses
Note: MUST list the first and the last address of each subnet with
the correct mask
e. How many addresses are NOT used from the assigned block
Please fill in the table below with your answer for sub-netting problem
Question | Answer |
Total number of addresses |
|
/20 mask in dotted-decimal |
|
First and last addresses in assigned block | FA: LA: |
4a. Subnet 1 first and last addresses with correct mask | FA: LA: |
4b. Subnet 2 first and last addresses with correct mask | FA: LA: |
4c. Subnet 3 first and last addresses with correct mask | FA: LA: |
5.Number of addresses not used |
|
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