distribute into $2$ sections $($Building A: $52/$ Building B: $93)$

Building A: $189\mathrm{.}40\mathrm{.}03\mathrm{.}0/25$ ~ $189\mathrm{.}40\mathrm{.}03\mathrm{.}63/25($WHAT$$S THE SUBNET? oh $/25)$

Building B: $189\mathrm{.}40\mathrm{.}03\mathrm{.}64/25$ ~ $189\mathrm{.}40\mathrm{.}03\mathrm{.}191/25$

ip $=189\mathrm{.}40\mathrm{.}03\mathrm{.}0/24$

$**24=$ prefix $=$ network bits, $8=$ host bits

$**$ total number of host bits$=2^8-2=256-2=254$

$**$network address:

$.../00000011/00000000($ip$)$

$.../11111111/00000000($sub$)$

$------------------------------------$ AND operation

$.../00000011/00000000($network address$)$ now convert into decimal

$->$ network address: $189\mathrm{.}40\mathrm{.}3\mathrm{.}0$

$**$broadcast address: $189\mathrm{.}40\mathrm{.}03\mathrm{.}255($add the total number of host bits$)$

$->$ distribute into $3$ sections $(52,51,42)$ : All less than $128$

$->$ Building A: $189\mathrm{.}40\mathrm{.}03\mathrm{.}0/26$ ~ $189\mathrm{.}40\mathrm{.}03\mathrm{.}63/26$

$->$ Building B$\_1($GF$)$: $189\mathrm{.}40\mathrm{.}03\mathrm{.}64/26$ ~ $189\mathrm{.}40\mathrm{.}03\mathrm{.}127/26$

$->$ Building B$\_2($FF$)$: $189\mathrm{.}40\mathrm{.}03\mathrm{.}128/26$ ~ $189\mathrm{.}40\mathrm{.}03\mathrm{.}191/26$

$->$ distribute again according to the floors $($GF$/$FF$)$: BUT START FROM BUILDING A FF crying in pain

$->$ Building A $-$ FF $30$ devices: less than $32$ : $189\mathrm{.}40\mathrm{.}03\mathrm{.}0/27$ ~ $189\mathrm{.}40\mathrm{.}03\mathrm{.}33/27$

$->$ Administration Office: $18$ devices : less than $32189\mathrm{.}40\mathrm{.}03.$

Network Address of this Subnet:

Broadcast Address on this Subnet:

IPv$4$ Address of First Host on this Subnet:

IPv$4$ Address of Last Host on this Subnet:

$10\%$ host address space added for future development:

$->$ Network Equipment Room: $5$ devices: less than $8$

Network Address of this Subnet:

Broadcast Address on this Subnet:

IPv$4$ Address of First Host on this Subnet:

IPv$4$ Address of Last Host on this Subnet:

$10\%$ host address space added for future development:

$->$ Meeting Room $1$: $3$ devices : less than $4$

Network Address of this Subnet:

Broadcast Address on this Subnet:

IPv$4$ Address of First Host on this Subnet:

IPv$4$ Address of Last Host on this Subnet:

$10\%$ host address space added for future development:

$->$ Manager$$s Office: $3$

Network Address of this Subnet:

Broadcast Address on this Subnet:

IPv$4$ Address of First Host on this Subnet:

IPv$4$ Address of Last Host on this Subnet:

$10\%$ host address space added for future development: solution for this