BLOG FOUR - MORE SUBNETTING

Find Apple Inc net address and network range.  Divide this range into about 1000 subnets.  Show the first five subnet ranges.

Step One:
Ping - www.apple.com
Result - 17.253.144.10

Step Two:
Net address range discovery using IP WHO IS.

IP WHO IS – 17.253.144.10
NetRange:	17.0.0.0 - 17.255.255.255
CIDR:	17.0.0.0/8
NetName:	APPLE-WWNET

Step Three:
Calculate subnets with binary notation

	17.0.0.0 / 18
17 : SSSSSSSS : SSHHHHHHHH : HHHHHHHH
2S = 1024 Subnets
2H = 16,384 Usable 16,384– 2 = 16,382	Number of usable hosts per subnet
CIDR:	18 E.g., (8(17) + 8(SSSSSSSS) + 2(SS))
Number of Subnets:	1024
Usable Hosts Per Subnet:	16,382
11111111 . 11111111 . 11000000 . 00000000
Subnet Mask:	255.255.192.0
First Subnet:	17.0.0.0
First Subnet First Usable Addresses: Last Usable Address:	17.0.0.1 17.0.63.254
Broadcast Addresses:	17.0.63.255
Second Subnet	17.0.64.0
Second Subnet First Usable Addresses: Last Usable Address:	17.0.64.1 17.0.127.254
Broadcast Addresses:	17.0.127.255
Third Subnet	17.0.128.0
Third Subnet First Usable Addresses: Last Usable Address:	17.0.128.1 17.0.191.254
Broadcast Addresses:	17.0.191.255
Fourth Subnet	17.0.192.0
Fourth Subnet First Usable Addresses: Last Usable Address:	17.0.192.1 17.0.255.254
Broadcast Addresses:	17.0.255.255
Fifth Subnet:	17.1.0.0
Fifth Subnet First Usable Addresses: Last Usable Address:	17.1.0.1 17.1.63.254
Broadcast Addresses:	17.1.63.255