Here's a great resource: pad http://www.nanog.org/isp.html#cidr scroll down to CIDR and download "Understanding IP Addressing: Everything You Ever Wanted to Know" by Chuck Semeria
Looking at your specific problem - think in powers of two. 400 nodes is greater than 256 but less than 512. Use /23 out of your allocation. 200 is less than 256 so use a /24. 50 is greater than 32 and less than 64 so use a /26 for each. The serial links each need a /30. Probably best to take the last /28 from the allocation and break it down into four /30s. > -----Original Message----- > From: Steven Aiello [mailto:[EMAIL PROTECTED] > Sent: Tuesday, September 09, 2003 7:02 AM > To: [EMAIL PROTECTED] > Subject: Please Help - CIDR - How the bits work [7:75050] > > > I just started my routing class for my CCNP. We are covering > CIDR. The > book is VEEEEEERY vague on how the bit patterns break down > and are used. > > > This was a problem posed in one of my CCNP labs > > I have network number > > 192.168.24.0 / 22 > > from this I need > networks with > > 400 hosts > 200 hosts > 50 hosts > 50 hosts > 2 hosts (for serial int - no ip un-numbered allowed ) > 2 hosts > 2 hosts > > Also no NATing > > Thanks all I really could use the help > > Steve **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html ________________________________________________________________________ This email has been scanned for all viruses by the MessageLabs Email Security System. For more information on a proactive email security service working around the clock, around the globe, visit http://www.messagelabs.com ________________________________________________________________________ Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=75171&t=75050 -------------------------------------------------- **Please support GroupStudy by purchasing from the GroupStudy Store: http://shop.groupstudy.com FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html
