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39930
5 pts.
 subnetting.
IP Subnetting, Subnetting
given 45.30.138.217/14 class a, 1st useable IP 45.28.0.1

how did they get 45.28.0.1?



Software/Hardware used:
Window Xp
ASKED: February 24, 2010  7:16 PM
UPDATED: February 25, 2010  12:53 PM
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Answer Wiki:
Try this <a href="http://www.subnet-calculator.com/subnet.php?net_class=A">online subnet calculator</a>. The answer shown is correct. *************************** the ip you've just said is not a class a, class a ranges from 10.0.0.0 - 10.255.255.255. there are calculations needed if you are new to subnetting. in this case, you just have to rely on the subnet calculator. Little by little you'll discover the technique on why is 45.28.0.1 ip is the first usable address.
Last Wiki Answer Submitted:  February 25, 2010  4:02 am  by  Labnuke99   32,645 pts.
All Answer Wiki Contributors:  Labnuke99   32,645 pts.
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hi labnuke99,

thanks for the online subnet calculator information….at times my boss debates with the network guys on subnet and always cannot find an answer…hahaha

jinteik
 15,485 pts.
 

Yeahboy… the address the OP shows IS a class A address. The address you mention is one of the reserved class A addresses that is not routable across public networks. See this TCP/IP Guide article for additional information.

Labnuke99
 32,645 pts.