IP Address Classes Explained - Class A, B, C [Cisco CCNA, CompTIA A+, Network+]

IP addressing classes explained. Address classes and IPv4 addressing.
World-class IT certification video training, follow-along labs, practice exams and live Cisco racks.
Please use this special URL to get 30 days of access for $1 -
www.howtonetwo...
Get all my motivation goodies FREE -
www.howtonetwo...
Check out our hands-on IT certification training website:
www.101labs.net
Use coupon code 'youtube' to get a fat discount.
Check out my IT books on Amazon:
Cisco CCNA Simplified - amzn.to/2Kqfvin
Cisco CCNA in 60 Days - amzn.to/2yr9aMA
101 Labs - Certified Ethical Hacker - amzn.to/39bywoO
101 Labs - CompTIA Security+ - amzn.to/3gPb2Y2
101 Labs - CompTIA PenTest+ - amzn.to/3iJyGG1
101 Labs - Cisco CCNA - amzn.to/32Jj7q6
101 Labs - Cisco CCNP - amzn.to/3kA4gEN
101 Labs - Linux LPIC1 - amzn.to/2zKby2Q
101 Labs - CompTIA Linux+ - amzn.to/36m3seN
101 Labs - Python - amzn.to/3Ina0gx
101 Labs - Wireshark WCNA - amzn.to/32JhLvp
101 Labs - CompTIA Network+ - amzn.to/3ljtfOX
101 Labs - CompTIA A+ - amzn.to/3nObR3i
101 Labs - IP Subnetting - amzn.to/2qWljqh
101 Labs - Cisco CCNP - amzn.to/3kA4gEN
IP Subnetting - Zero to Guru - amzn.to/2DMA9Hy

[@chezwoods7575]

i think this video was absolutely great for beginners like me! I just started my comp science journey and was so lost. You broke it down for dummies and your voice is clear. its so hard to find videos w/o heavy accents, its already hard to understand all this computer stuff so the accent adds another layer of difficulty for comprehension. great job!!!

[@triplea2443]

Thanks for the upload… is 2023 and my professor is teaching it the same way .

[@r3jk8]

great video! very engaging presentation. also, you have a killer voice for making videos!

[@MACATK-ph9bu]

Are the classes for Ipv4 the same as Ipv6? For example a class c address for both would start with 192?

[@leonarubin]

You need to learn legacy first

[@James_Knott]

Legacy, that is the original IPv4, had 8 bit network addresses and 24 bit host addresses. Address classes came later and CIDR later still.

[@jonnysokkoatduckdotcom]

Naaaa good bye

[@Philitron128]

No! Do not give up! Also, don't start with CCNA haha, start with A+ and then do Net+! I promise that you can do it! Set aside 10 hours a week to read the books and go through the questions! That will take a few months, BUT you will have a good understanding of IT and Networking as a whole afterwards. You wouldn't be an expert but your brain won't be spinning at this video haha

[@James_Knott]

Why are you discussing something that's been obsolete for almost 30 years? Classless Inter-Doamain Routing (CIDR) superceded address classes in 1993. Also, what was class E is now reserved for future use. You should be talking about CIRD and variable length subnets instead. Also, the solution to the IPv4 address shortage, is not private addresses and NAT. It's IPv6 which has an unbelievably huge address space. NAT is a hack that causes other problems.

[@howtonetworkcom]

You need to read the exam syllabus' for the CCNA and CompTIA exams which do test on classes. If you think something needs to be mentioned then you can start your own channel and make some videos. IPv4 solutions predated IPv6. I'm not sure you understand the concept to be honest, you can ready my subnetting books on Amazon.
regards

[@James_Knott]

@@howtonetworkcom Actually, I got my CCNA a few years ago and address classes were in the book. ( I also did my Novell Netware CNA back in the mid 90s.) Frame relay was also covered, even though it's also been obsolete for many years. In fact, I haven't seen any since the mid 90s and I work in telecom. Instead of frame relay, MPLS should have been covered, which is current technology and was when I went for my CCNA. IIRC, MPLS is only covered in a more advanced certification. Regardless, teaching address classes these days is a waste of your time and your viewers, as it hasn't been relevant for almost 30 years. Maybe you could do something on IPv6 instead, which is important these days. I have been running IPv6 on my home network for over 12 years.
A bit of history. Originally, there was only what became known as class A. That is all networks had an 8 bit network address and 24 bit host address. This quickly proved inadequate and the address classes were created to make more networks available. After a while even that wasn't good enough and CIDR was created to better distribute addresses and networks.

[@James_Knott]

@@louvierejacques So, you think it's OK to teach obsolete material instead of current practice? Certainly teach it in a historical context, to help explain how we got to where we are. However, it's no longer relevant to today's networks. Incidentally, Vint Cerf, one of the guys who created IP, said that IPv4 was not intended for production. It was only to show proof of concept and the release version should have longer addresses. However, IPv4 escaped and created the situation of inadequate address space, resulting in hacks like NAT, which cause even more problems and hacks. The only solution for this situation is to move to IPv6.

[@thomasmorey5512]

@@James_Knott almost everyone out there still uses IPv4 outside of extremely large networks with lots of resources. I've been working on commercial systems for years now and never once needed to know anything about IPv6 or CIDR, but I use this shit every day.

[@James_Knott]

@@thomasmorey5512 You mean you've never set a subnet mask length? That's CIDR and I haven't seen anything else with IPv4, going back over 25 years. Do you have a cell phone that runs 4G or 5G? IPv6 is mandatory with it. In fact, my phone uses 464XLAT to provide IPv4 when needed, over an IPv6 only cell network. Many ISPs, including mine, have provided IPv6 for years. Mine has for about 7 years. I have been using IPv6 at home for over 12 years. All the major sites, such as Google, Facebook, Microsoft and more support it. I also have been working with IP for many years. I first had a course on IPv4 at a local college in early 1995 and shortly after read about IPv6 in the April 1995 issue of Byte magazine. If you work with networks, you really should learn about IPv6. It's also been part of the Cisco CCNA for years.