Thursday, January 18, 2024

subnetting on checkpoint

 

https://jodies.de/ipcalc

Address: 192.168.0.1 11000000.10101000.00000000 .00000001

Netmask:   255.255.255.0 = 24    11111111.11111111.11111111 .00000000
Wildcard:  0.0.0.255             00000000.00000000.00000000 .11111111
=>
Network:   192.168.0.0/24        11000000.10101000.00000000 .00000000 (Class C)
Broadcast: 192.168.0.255         11000000.10101000.00000000 .11111111
HostMin:   192.168.0.1           11000000.10101000.00000000 .00000001
HostMax:   192.168.0.254         11000000.10101000.00000000 .11111110
Hosts/Net: 254                   (Private Internet)


Should you ever forget intricacies of the subnetting Checkpoint bothered not to strip subnetting calculator from their Splat – ipcalc, so use it and litter not your memory with useless info.Given subnet show the 1st Ip (network) :

# ipcalc -n 192.168.34.45/27
NETWORK=192.168.34.32

Given subnet show the last IP (broadcast) :

# ipcalc -b 192.168.34.45/27
BROADCAST=192.168.34.63

Be careful though what you feed as no proof-reading is done by the ipcalc :

# ipcalc -b 192.168.34.45/33
BROADCAST=255.255.255.255
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