Solved

Class D subnets

Posted on 2014-09-03
5
159 Views
Last Modified: 2014-09-18
I have seen online , where they mention Class D:
CIDR block 224.0.0.0/4
Range: Network - Broadcast  224.0.0.0 - 239.255.255.255

I am not sure why it goes from 224 to 239. How did they come up with it ? since it is /4 as notation?


On this link: http://ipduh.com/ip/cidr/?224.0.0.0/4.
they even say Netmask = 240.0.0.0

Confusing to me

Thank you
0
Comment
Question by:jskfan
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
5 Comments
 
LVL 83

Accepted Solution

by:
Dave Baldwin earned 250 total points
ID: 40302773
Class D was a reserved section of IP addresses.  This page http://en.wikipedia.org/wiki/Classful_network might help.  This page from IANA http://www.iana.org/assignments/ipv4-address-space/ipv4-address-space.xhtml shows it is still reserved.
0
 

Author Comment

by:jskfan
ID: 40302875
was just looking on youtube....
it says  class D uses first 4 bits 1110...  which means 224 and 1111 is 240
0
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 40302878
That's what my links say also.
0
 
LVL 11

Assisted Solution

by:Miftaul
Miftaul earned 250 total points
ID: 40302970
IP is a binary notation where the first 4-bits of the first octet decides which class the IP address will fall into.

Here is the rule

Class A - First octet has to be between 0000 0000 - 0111 1111 - in decimal 0 - 127 ( 127 is reserved for loopback)
Class B - First octet has to be between 1000 0000 - 1011 1111 - in decimal 128 - 191
Class C - First octet has to be between 1100 0000 - 1101 1111 - in decimal 192 - 223
Class D - First octet has to be between 1110 0000 - 1110 1111 - in decimal 224 - 239
Class E - First octet has to be between 1111 0000 - 1111 1111 - in decimal 240 - 255

Class D will be the IP addresses where the first bit is between 1110 0000 - 1110 1111 that is 224 - 239.
0
 

Author Closing Comment

by:jskfan
ID: 40331897
Thank you Guys
0

Featured Post

Create the perfect environment for any meeting

You might have a modern environment with all sorts of high-tech equipment, but what makes it worthwhile is how you seamlessly bring together the presentation with audio, video and lighting. The ATEN Control System provides integrated control and system automation.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Problem Description:   Couple of months ago we upgraded the ADSL line at our branch office from Home to Business line. The purpose of transforming the service to have static public IP’s. We were in need for public IP’s to publish our web resour…
There are two basic ways to configure a static route for Cisco IOS devices. I've written this article to highlight a case study comparing the configuration of a static route using the next-hop IP and the configuration of a static route using an outg…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
Suggested Courses
Course of the Month5 days, 1 hour left to enroll

635 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question