Bruh I had like 1 day left to create an entire presentation on IP addresses, and I was so confused. Legit nothing helped me, I couldn't understand anything anybody else was telling me. You are my savior, kind sir. I am forever in your debt.
Very good explanation. I now fully understand subnet masks. The only downside is that u made an error for the Class B subnet mask. The example that was used is a Class C default subnet mask. Class B = 255.255.0.0 while Class C = 255.255.255.0. Still a good video however and I now have a better understanding. Thank you!
A router does not typically use a subnet mask to dermine a host portion and network portion. The only time it might use one is when it is sourcing a packet. The router utilizes the subnet mask to determine whether the destination address of the packet is on the local subnet. The router still uses subnet masks stored in its routing table to process packets but not to determine a host and network portion.
Thank you Mr.French, your explanation brings it back to the basics without disturbing calculations pictures and numbers but with mentioning the technical reason for it. This gives me the chance not to forget it. Thank you!
@ 8:50, my life got turned upside down. All these years I had no idea. Best explanation ever. 25 years old and dealing with computers all my life and finally, it makes sense.
Thank you Greg, this was a wonderfully explained video. I don't mind your small refreshers on things like binary and ANDing because you explained them very carefully, and nothing was missed if one skipped forward a bit. Great video, and you really talked about what matters instead of what doesn't.
A Class A subnet mask reflects the network portion in the first octet and leaves octets 2, 3, and 4 for the network manager to divide into hosts and subnets as needed. Class A is for networks with more than 65,536 hosts. A Class B subnet mask claims the first two octets for the network, leaving the remaining part of the address, the 16 bits of octets 3 and 4, for the subnet and host part. Class B is for networks with 256 to 65,534 hosts. In a Class C subnet mask, the network portion is the first three octets with the hosts and subnets in just the remaining 8 bits of octet 4. Class C is for smaller networks with fewer than 254 hosts. Class A, B, and C networks have natural masks, or default subnet masks: Class A: 255.0.0.0 Class B: 255.255.0.0 Class C: 255.255.255.0 You can determine the number and type of IP addresses any given local network requires based on its default subnet mask. An example of Class A IP address and subnet mask would be the Class A default submask of 255.0.0.0 and an IP address of 10.20.12.2.
I really like how the video straightforward explains the subject matter at its baseline without bringing too much technical jargon into it. Is my basic understanding correct? Subnet purpose: make networks more manageable and prevent them from overloading with too many users/machines. Subnet mask purpose: Allow a computer to check whether another computer is local or remote.
Break up broadcast domains. Also logical isolation. If there is no route between two broadcast domains then they can not communicate. They are isolated.
The classes of Subnet Masks at 3:49 shows Class A using 255 in the first octet, Class B using 255 in the first and second octets, and Class C using 255 in the first, second, and third octets. At 6:40 an example of a Class B shows 255 in the first three octets. Why is it not 255 in only the first and second? Wouldn't that be a Class C example?
You need to look at the binary numbers to understand how the computer uses the subnet mask to determine the network and host portion of the address. Hope this helps.
the default subnet for class B is 255.255.0.0 but in the second case he kept the custom subnet mask for the given class B address. It is bacause 8 bits has been borrowed from the host portion to subnet the given IP..
So the subnet masking is a bitwise function essentially in order to separate what nodes can see as a security measure but also for segmenting the network jobs. A router needs to assume as few responsibilities as possible to speed up the network. A small router with minimal processing power and less ram needs to deal with smaller instruction sets.
I don’t understand what the three cylinder shaped things are with the different numbers in the third octet?? Are those the routers? I thought routers have a 1 as the last octet?
Would be better if you have explained some about the use case scenarios of the different Class of subnet mask addresses. I only see about the class C type of subnet mask everywhere. Also, the customizable nature of the subnet mask , that one can assign class C subnet mask to a class B IP address. I enjoyed the video though. Thanks
I'm confused a bit. If you create 2 logical networks from the outer network, so the two subnet's IPs are 135.68.2.0 and 135.68.3.0, does that mean the first three octets of the subnet mask make up the network address, and the 4th octet is for the host addresses, and therefore a class C subnet mask?
Hello sir, I understand that you are creating a new subnet by using binary 1s in the 1st 3 octets. But that way, the 1st 3 octets are reserved for network portion and the last octet for host portion. That is clearly understandable. But why is it going to be an example of class B IP address?? This scheme is used of classifying class C IP right??
The Classes only refer to the numbers in the first octet of the IP address. The 1's in the subnet mask determine the network portion and the 0.s the host portion.
Thanks for posting this video, but can you please use something other than your mouse to point stuff out on the screen? It's really hard to follow what you're pointing at with the mouse and when you go so fast.
So a subnet mask basically separates or "filters" IP addresses into two different portions - the network portion and the host portion. Correct? So the host is the entire network itself and the other IPs are for nodes or the individual computers, right? Thanks for the lecture! :D
May i ask the 02.50 the ip address 135.68.1.0 must i have enough ipaddress to cover the other department let say for E.g each of my department has 20 host do the router 135.68.1.0 let say /24 needs enough host to cover all department ip address Or can i just put it as 135.68.1.0/31
The Class B default subnet mask is 255.255.0.0 and by setting binary ones reserves the first and second octet for network addresses. The next two octets have zeros which is reserves these octets for host addressing. By setting ones in the third octet we are telling devices to consider the third octet as part of the network address and this creates a new subnet. Hope this helps.
So what you're saying is, if someone asks you to architect and set up IP's for the respective NE's, tell them you would love to but you just got called into a meeting about raises and management is looking for your direct input as to whom gets what. Right? (joking)
Yes, Mr. French, I've researched almost 50 of these videos to get the best explanation, and
yours is the best! Thank you!
Thanks for the comment.
You did a great job on explaining it better from all. I look forward for all network topic to understand.
Bruh I had like 1 day left to create an entire presentation on IP addresses, and I was so confused. Legit nothing helped me, I couldn't understand anything anybody else was telling me. You are my savior, kind sir. I am forever in your debt.
Bro me too
This is the simplest break down on how the network portion of the IP correlates with the host portion of the IP, thanks!
Very good explanation. I now fully understand subnet masks. The only downside is that u made an error for the Class B subnet mask. The example that was used is a Class C default subnet mask. Class B = 255.255.0.0 while Class C = 255.255.255.0. Still a good video however and I now have a better understanding. Thank you!
Your voice reminds me of Jeff Goldblum. Thanks for this video.
So true 😂
Bravo
Lol. Life finds a way
Must Go Faster
Oh man spot on
A router does not typically use a subnet mask to dermine a host portion and network portion. The only time it might use one is when it is sourcing a packet. The router utilizes the subnet mask to determine whether the destination address of the packet is on the local subnet. The router still uses subnet masks stored in its routing table to process packets but not to determine a host and network portion.
Thank you Mr.French, your explanation brings it back to the basics without disturbing calculations pictures and numbers but with mentioning the technical reason for it. This gives me the chance not to forget it. Thank you!
This is the best tutorial I could find on the topic. Thank you. You take a complex concept and make it simple as possible.
@ 8:50, my life got turned upside down. All these years I had no idea. Best explanation ever. 25 years old and dealing with computers all my life and finally, it makes sense.
Thank you Greg, this was a wonderfully explained video. I don't mind your small refreshers on things like binary and ANDing because you explained them very carefully, and nothing was missed if one skipped forward a bit. Great video, and you really talked about what matters instead of what doesn't.
A Class A subnet mask reflects the network portion in the first octet and leaves octets 2, 3, and 4 for the network manager to divide into hosts and subnets as needed. Class A is for networks with more than 65,536 hosts.
A Class B subnet mask claims the first two octets for the network, leaving the remaining part of the address, the 16 bits of octets 3 and 4, for the subnet and host part. Class B is for networks with 256 to 65,534 hosts.
In a Class C subnet mask, the network portion is the first three octets with the hosts and subnets in just the remaining 8 bits of octet 4. Class C is for smaller networks with fewer than 254 hosts.
Class A, B, and C networks have natural masks, or default subnet masks:
Class A: 255.0.0.0
Class B: 255.255.0.0
Class C: 255.255.255.0
You can determine the number and type of IP addresses any given local network requires based on its default subnet mask.
An example of Class A IP address and subnet mask would be the Class A default submask of 255.0.0.0 and an IP address of 10.20.12.2.
Noted
This was the best explanation I have seen and really stuck, thanks.
I really like how the video straightforward explains the subject matter at its baseline without bringing too much technical jargon into it.
Is my basic understanding correct?
Subnet purpose: make networks more manageable and prevent them from overloading with too many users/machines.
Subnet mask purpose: Allow a computer to check whether another computer is local or remote.
Break up broadcast domains. Also logical isolation. If there is no route between two broadcast domains then they can not communicate. They are isolated.
The classes of Subnet Masks at 3:49 shows Class A using 255 in the first octet, Class B using 255 in the first and second octets, and Class C using 255 in the first, second, and third octets. At 6:40 an example of a Class B shows 255 in the first three octets. Why is it not 255 in only the first and second? Wouldn't that be a Class C example?
i was wondering the same
You need to look at the binary numbers to understand how the computer uses the subnet mask to determine the network and host portion of the address. Hope this helps.
the default subnet for class B is 255.255.0.0 but in the second case he kept the custom subnet mask for the given class B address. It is bacause 8 bits has been borrowed from the host portion to subnet the given IP..
KlevonOfJesup you right
subnet is just a filer
So the subnet masking is a bitwise function essentially in order to separate what nodes can see as a security measure but also for segmenting the network jobs. A router needs to assume as few responsibilities as possible to speed up the network. A small router with minimal processing power and less ram needs to deal with smaller instruction sets.
I just started learning Networking stuff, thank you for this video. Very clear to understand and easy on the ears.
If you already understand binary then this is by far the best explanation. You, Mr.French, are getting a new subscriber.
Very detailed and useful. Thanks for a high quality explanation!
YOUR SLOW PACE HELPED A LOT
i have been asking this question for 30 years. now i understand . TQ teacher
I'm really thankful cause i searched all the net for a simple explanation found none
I finally understand subnet masks. Greg you're a god my guy.
I don’t understand what the three cylinder shaped things are with the different numbers in the third octet?? Are those the routers? I thought routers have a 1 as the last octet?
I wish all mysteries in life were this easily explained! Excellent video!
Thank you Greg!
Thanks for the explanation, the subnet masks make so much more sense now.
Thank you for taking a confusing subject ( confusing to me anyway) and breaking it down part by part into something that is actually understandable.
I had to rewatch / re-listen a couple of times, especially at 6:00 to 8:00 ish, but damn this is an absolutely excellent tutorial.
why you added subnet mask of class c range
Would be better if you have explained some about the use case scenarios of the different Class of subnet mask addresses. I only see about the class C type of subnet mask everywhere.
Also, the customizable nature of the subnet mask , that one can assign class C subnet mask to a class B IP address. I enjoyed the video though. Thanks
Great video, was a bit unclear at 6:30 but comments and repeated listening got me through it. Thank you!
A brilliant video, it really gets to the point without getting lost .
Thanks for the comment.
Best explanation I could find - amazing, thank you! 👍🏻
Great and simple explanation. Thank you Greg!
Tq sir for the explaination.. You are the best explainer that i get and easy to understand.. Much appreciate it!
you make all this sound so easy.
Thank you, Mr. French! Excellent! Great teachers break it down to the easiest level!
Very clear explanation. Thank you very much for going into detail of the filtering process.
RIP i just noticed in the comment sections he passed away :(
This makes so much sense now....
Very nice explanation. Thank you
Thanks for a great Video! - to the point and easy to understand.
this is how all teacher should teach to their student.
hi Greg, since this IP belongs to class B the network id should be 135.68 and subnet mask should be 255.255.0.0 isnt it ?
Clear explanation. Made sense thank you
that was great. to the point without the channel branding stuff. thanks very mcin
Its like a filter, thanks man :D
every body can not be a teacher but you sir have qualities of a teacher excellent!!!!..I learned something and thankful......
thank u
easy to understand , simple explanation best video for subnet
0:01 Introduction
1:15 Illustration
2:53 Number System
9:41 Illustration
Great vid, really tied some concepts together for me
Thanks Greg nice video, helped me a lot to understand the subnet mask :)
What a fantastic explanation. Thank you.
Is this why DHCP was invented? So we could avoid having to calculate the network IP address after assigning a subnet?
DHCP was created to solve the burden of having to manually configure each interface.
Great explanation, really helped me understand this.
I'm confused a bit. If you create 2 logical networks from the outer network, so the two subnet's IPs are 135.68.2.0 and 135.68.3.0, does that mean the first three octets of the subnet mask make up the network address, and the 4th octet is for the host addresses, and therefore a class C subnet mask?
This was a big help. Much appreciated.
easy and amazing, thank you so much
Hello sir, I understand that you are creating a new subnet by using binary 1s in the 1st 3 octets. But that way, the 1st 3 octets are reserved for network portion and the last octet for host portion. That is clearly understandable. But why is it going to be an example of class B IP address?? This scheme is used of classifying class C IP right??
The Classes only refer to the numbers in the first octet of the IP address. The 1's in the subnet mask determine the network portion and the 0.s the host portion.
thanks excellent presentation!!!!
awesome video, nice explanation, easy to understand 😃
Thank you, very clear explanation. God bless you!!
This makes a lot of sense. Thank you so much!
Sir, is subnetting done only for private networks/IP's? If it is also for Public Networks/IP's, then how it is done for such networks (public)?
In that example shouldn't it be Class C? As you have used 255.255.255.0 as mask ?
Awesome!!! Excellent!!! Thank you!!
Excellent tutorial, many thanks for sharing
You made my day brother
This makes a lot of sense! Thank you :)
Greet explanation! thank you!
thx so much Greg u a legend for this
hello, so on the first illustration you showed, what's the mask of for example the IP 135.68.1.0 ?
Thank you ... your a great teacher!
Thanks Jeff Goldblum
Thanks for posting this video, but can you please use something other than your mouse to point stuff out on the screen? It's really hard to follow what you're pointing at with the mouse and when you go so fast.
So a subnet mask basically separates or "filters" IP addresses into two different portions - the network portion and the host portion. Correct? So the host is the entire network itself and the other IPs are for nodes or the individual computers, right? Thanks for the lecture! :D
Do you think this system will eventually be scrapped or revamped in the future just how IPv6 is taking over?
Thank you sir for this tutorial. It was very usefull.
I finally understand!.. Thank you so much!
Thanks for the video.
Can you elaborate on the chaos that would ensue by using a subnet mask of 255.255.0.0?
sidekick rida sorry Greg passed away. This is his daughter. Wish I knew the answer.
That would lead to communism, dogs and cats living together... mass hysteria!
@@GregFrench sorry to hear that, he was awesome man
Greg French may his sole rest in peace
sidekick rida was just searching this question in comment section
At 6.07, the mask is for a class C instead of a class B
Thanks Greg.
Yes, it did help. Thank you!
How can every pc have unique ip when there is nas?And also,when we subneting,we subnet the local ip that the router give us or the ip of the router?
Excellent teaching.
God bless you Greg.
how you determine the mask I dont understand yet! at 9:17
How is localized sub addresses going to be handled with version 6 ip’s?
May i ask the 02.50 the ip address 135.68.1.0 must i have enough ipaddress to cover the other department
let say for E.g each of my department has 20 host do the router 135.68.1.0 let say /24 needs enough host to cover all department ip address
Or can i just put it as 135.68.1.0/31
Very thorough. Thank you.
Greg am I wrong? from 6:00 min is it not a Subnet Class C? 255.255.255.0
Thanks for this video
Thanks alot buddy...u helped me alot...i don't know how to thank u...
How to access multiple bio metric devices remotely through WAN ?
i would like to know why we used 3 octets for a class B network at 6:28
The Class B default subnet mask is 255.255.0.0 and by setting binary ones reserves the first and second octet for network addresses. The next two octets have zeros which is reserves these octets for host addressing. By setting ones in the third octet we are telling devices to consider the third octet as part of the network address and this creates a new subnet. Hope this helps.
Fantastic video, thanks heaps!
thank you very much.
Very helpful. Thank you!
Couldnt ask for any better
Your very good teacher
Wish I seen this way before
So what you're saying is, if someone asks you to architect and set up IP's for the respective NE's, tell them you would love to but you just got called into a meeting about raises and management is looking for your direct input as to whom gets what. Right?
(joking)