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Full Discussion: Subnetting
Special Forums IP Networking Subnetting Post 302993569 by lobsang on Saturday 11th of March 2017 07:33:30 AM
Old 03-11-2017
Quote:
Originally Posted by drysdalk
Hi,

To put it as simply as possible, in any given network range the very first address and the very last address are not usable for hosts. The first address is the network address, and the last address is the broadcast address.

So for 192.168.1.0/24 you'd have:

192.168.1.0 - Network address (NOT usable for hosts)
192.168.1.1 through 192.168.1.254 - Free IPs (Usable for hosts)
192.168.1.255 - Broadcast address (NOT usable for hosts)

And for /25 sub-nets (and all others besides) it'd be the same: the first address in the range and the last address in the range are not usable for hosts.
Thank you Drysdalk . i believe i didn't understood properly what a single ip address means. From your above explanation . for e.g.
Code:
192.168.1.1 through 192.168.1.254 - Free IPs (Usable for hosts)

Does all those ip are list of single ip address. i believe list of hosts in ip class means list of single ip address. Does my public ip address as mentioned
Code:
46.126.40.51

means one of hosts from class A public ip address .
 

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pydhcplib.ipv4(3)						     PYDHCPLIB							 pydhcplib.ipv4(3)

NAME
pydhcplib.ipv4 - Type for IP addresses version 4 SYNOPSIS
from pydhcplib.type_ipv4 import ipv4 a = ipv4() a = ipv4(string) a = ipv4(strlist) a = ipv4(int) DESCRIPTION
The class pydhcplib.ipv4 is a type "IP address version 4". It's used for string processing like "192.168.0.4". The class creation argument can be a string like "192.168.0.4". The class creation argument can be a list of bytes like [192,168,0,4]. METHODS
The implemented methods in this class are mostly methods of comparison (= =, >, etc...) else : str() return data converted into a printable string. list() return data converted into a list of bytes. int() return data converted into an 4 bytes int. EXAMPLES
Example program ipv4_example.py : from pydhcplib.type_ipv4 import ipv4 address = ipv4() address1 = ipv4("192.168.0.1") address2 = ipv4("10.0.0.1") address3 = ipv4([192,168,0,1]) print "a0 : ",address print "a1 : ",address1 print "a2 : ",address2 print "a3 : ",address3 if address1 == address2 : print "test 1 : ",address1, "==",address2 else : print "test 1 : " ,address1, "!=",address2 if address1 == address3 : print "test 2 : ", address1, "==",address3 else : print "test 2 : ", address1, "!=",address3 SEE ALSO
pydhcp(8), pydhcplib.hwmac(3), pydhcplib.ipv4(3), pydhcplib.strlist(3), pydhcplib.DhcpPacket(3), pydhcplib.DhcpBasicPacket(3), pydhc- plib.DhcpNetwork(3), pydhcplib.DhcpClient(3), pydhcplib.DhcpRawClient(3), pydhcplib.DhcpDerver(3) BUGS
See http://pydhcplib.tuxfamily.org/ for more information. AUTHOR
Mathieu Ignacio (mignacio[AT]april.org) pydhcplib.ipv4(3)
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