Тёмный

How IP Addresses Work | Network Fundamentals Part 4 

Network Direction
Подписаться 181 тыс.
Просмотров 495 тыс.
50% 1

Welcome to the fourth part of the Network Foundation series. This video looks at IP addressing, and how it works. This is critical information for anyone new to networking, or studying for CCNA or CCENT exams.
We start at the beginning, with what IP’s look like, and why. Understanding binary is your friend here! ( • Learn Binary and Conve... ).
Did you know that IP addresses are two addresses in one? Yes, it’s true! An IP includes the host address, as well as the address of the network it resides in.
Speaking of networks, we have changed how we address them over time. One of the early methods was to use classes. Perhaps you’ve heard of class A, B, and C networks?
But this has its limitations. So, we also have classless networks, or CIDR (Classless Inter-Domain Routing). This introduces a new concept: The subnet mask. Now we can break up networks as we see fit!
The next video will take this further, as we look at IP Addresses in Depth.
The CCENT/CCNA study guide (affiliate): click.linksynergy.com/link?id...

Наука

Опубликовано:

 

3 окт 2018

Поделиться:

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист
Посмотреть позже
Комментарии : 360   
@victostore2298
@victostore2298 11 месяцев назад
Showing the answers to the quiz immediately after will aid more understanding.
@ariefsaferman
@ariefsaferman 4 года назад
9.3.4.47 = class A 203.42. 62.1 = class C 103.88.77.22 = class A 151.10.13.55 = class B 222.2127.16.4 = Class C Just look at the first octet number when the range of every class A = 0-127 B = 128 - 191 C = 192-223 D = 224-239 E = 240-255
@meethpanjwani3227
@meethpanjwani3227 4 года назад
thanks man
@SalmanMalik-1234
@SalmanMalik-1234 3 года назад
Thank you so much
@ajaysharitra8310
@ajaysharitra8310 2 года назад
Thanks for the Huge Help Man !!!
@chijinduegbo5640
@chijinduegbo5640 2 года назад
Thanks
@jaccckky8978
@jaccckky8978 Год назад
Thank you very much
@amberkatz1680
@amberkatz1680 5 лет назад
I can't get over how good your videos are. You really made me believe in myself because finally I understand these topics which I've been struggling with. Thank you so much!
@NetworkDirection
@NetworkDirection 5 лет назад
Thank you, I really appreciate the feedback. Hopefully their getting even better!
@hodsh1
@hodsh1 3 года назад
Amber, would be interested to know what qualification are you studying for and what your career aspirations are?
@Jijarugen
@Jijarugen 4 года назад
bro deadass subnet masks have been the bane of my existence and then suddenly you come along and get me understanding in 15 minutes??
@NetworkDirection
@NetworkDirection 4 года назад
I like to hear this 😀
@tonywang7933
@tonywang7933 Год назад
The more I watch this series the more it baffles me how on earth I scored 84 on my 4th year university networking course yet still have so many details falsely understood, and how fortunate and grateful I'm finding these well explained videos. Thank you
@techtrainer916
@techtrainer916 4 дня назад
because college is just test prep memorization lol, you dont actually need to understand to pass.
@ZakirKhan-vb9ds
@ZakirKhan-vb9ds 4 года назад
After hours of reading and watching videos, never thought it would be so simplified
@leroyrowe93
@leroyrowe93 4 года назад
This is wonderful content, i really love how you mentioned equations to make it simpler to comprehend
@parasmyname784
@parasmyname784 4 года назад
Thank you so much bro. You taught me things I never go to learn in college. God bless you and wish you a great luck for your future endeavours
@tube-dude77
@tube-dude77 3 года назад
FANTASTIC video, although the last part still a bit difficult to make out. Gonna watch the next video and see what happens lol
@NetworkDirection
@NetworkDirection 3 года назад
Thanks. The next video will help explain more
@rakshitks7850
@rakshitks7850 5 лет назад
You are just awesome..... Keep up your good work You have made the explanation very simple and easy to understand.... Thanks a lot dude
@NetworkDirection
@NetworkDirection 5 лет назад
You're very welcome! More coming. TCP and UDP are next!
@mrberty2020
@mrberty2020 4 года назад
Easy to understand videos, again fabulous work. Thank you!
@AMan-yo3sy
@AMan-yo3sy 4 года назад
Thanks so much for these videos, they are incredibly helpful demistifying these vague concepts
@MrFireworks2
@MrFireworks2 5 лет назад
are you serious, I'm starting to intern at Microsoft right for networking and all I can say is THANK YOU FOR SAVING ME HAHA. These videos are EXCELLENT for review.
@LoveUnconditional777
@LoveUnconditional777 3 года назад
The best CCNA Series on RU-vid! So clear and concise. Your video series has provided great explanations of Network Security. It is much appreciated.
@NetworkDirection
@NetworkDirection 3 года назад
Wow, thanks!
@LoveUnconditional777
@LoveUnconditional777 Год назад
@@NetworkDirection You're more than welcome.
@PezhvakIMV
@PezhvakIMV 5 лет назад
finally a tutorial i was searching for, THANK YOU!
@NetworkDirection
@NetworkDirection 5 лет назад
Good to hear!
@vladyslavutkin8543
@vladyslavutkin8543 3 года назад
13:54 because 30 means we have only 2 bits so 172.16.2.1 is okay because 1 = 0000 00[01] but 172.16.2.20 is not okay because 0001 01[00] we need more bits not 2 but at least 5 so subnet should be 27. Am I right?
@jeffb587
@jeffb587 2 года назад
this is the answer i came up with. sounds right to me!
@jepoy1639
@jepoy1639 2 года назад
Nah fam thats the wrong answer
@animepussy8356
@animepussy8356 3 года назад
Your content is invaluable. TAFE CyberSec may now be more than a pipe-dream for me.
@azatkadyrov3634
@azatkadyrov3634 4 года назад
You have by far the best networking explanation videos out there. I have watched alot of them and also tried to read the books. But none of those pervious explanations are as clears as yours. Thank you kindly
@NetworkDirection
@NetworkDirection 4 года назад
This is feedback I love to hear! Thanks!
@xiaobai435
@xiaobai435 3 года назад
i would say books are clearer though
@aamirkhanmaarofi9705
@aamirkhanmaarofi9705 4 года назад
Wawo ! Never thought these concepts would be this much easy. You are doing excellent, I appreciate.
@NetworkDirection
@NetworkDirection 4 года назад
And I appreciate your comment, thanks!
@timothykoba2975
@timothykoba2975 3 года назад
Wonderful explanations and videos. Thanks so much!
@kimanikelvin7393
@kimanikelvin7393 Год назад
This guy should be protected at all costs great work. Can you do a DWDM video series?
@smilingphoenix6225
@smilingphoenix6225 Год назад
please explain also this areas like DWDM-SD-WAN technology......, how and why are they important and what is the reason for using them
@produdeyay
@produdeyay 4 года назад
Just pointing out a few things i noticed 1) on 6:42, class C is typed as class B 2) on 8:23, 172.16 vs 172.17 the first 16 bits for these 2 should be 172.16 = 1010 1100 0001 0000 172.17 = 1010 1100 0001 0001 instead of 1010 1101 as shown in the video for 172.17. 3) on 12:21, the subnet is on the 2nd number (i.e. for 172.16.0.1, the number 16 is highlighted). Since the first number is 172, I would assume this is a Class B network, therefore shouldnt the subnet number be the 3rd number (i.e. for 172.16.0.1 the subnet should be 0)? I am just starting out, so not sure if I am correct. Also thank you for such wonderful and well made videos!!!!!
@NetworkDirection
@NetworkDirection 4 года назад
Hi Produdeyay, you are absolutely right! I really appreciate that you are putting the effort into this. I wish I could say that this was deliberate to see who is paying attention but unfortunately typos happen.😀 Have a great day!
@thebrokenchords8329
@thebrokenchords8329 4 года назад
@@NetworkDirection hey i would just like to add that the BIGGEST MISTAKE was 6:03 As the example is being given of a class C type address which is wrong . 130.2.3.4 is not a class C address ,it is a CLASS B type address.
@ferdinandjohnson2359
@ferdinandjohnson2359 4 года назад
produdeyay s S sssf seas tsfastsFF
@iyedbouazdia3594
@iyedbouazdia3594 3 года назад
@@thebrokenchords8329 you're god damn right it is. I've noticed that too. I'm glad I'm not the only one :)
@sebastianmacchi6802
@sebastianmacchi6802 3 года назад
Yep! That's right! Also at 6:28 the limit for the class C should be 223.255.255.255 (not 223.255.255.0, since the last 8 bit can also go up 'til 255 --> 1111 1111)
@MetalMeek
@MetalMeek 2 года назад
Wonderful vid, finally sat down in earnest to begin studying this morning. I can muddle through binary, IP conversion, and subnetting at least a BIT now. :)
@NetworkDirection
@NetworkDirection 2 года назад
Glad it's helping!
@doctordoctor1800
@doctordoctor1800 4 года назад
Keep up the good work great job done to explain for us thank you alot
@celiodealmeida1539
@celiodealmeida1539 5 лет назад
You are doing a great job! I’m using your video tutorial to prepare for my ICND1 exam. Appreciate your effort.
@NetworkDirection
@NetworkDirection 5 лет назад
Hope you do well in the exam!
@kumikohigurashi5366
@kumikohigurashi5366 4 года назад
You've made my future and that of my family much better, thank you
@ndayizeyewilly1664
@ndayizeyewilly1664 4 года назад
Million thanks for all this videos i enjoy learning a lot from you thanks again
@motocomputer
@motocomputer 4 года назад
Thanks for the easy to follow explanation.
@NetworkDirection
@NetworkDirection 4 года назад
You're welcome Akhil! I'm glad that you have found our video helpful! We have more Network Fundamental videos coming so stay tuned. 😀
@penicksf
@penicksf 4 года назад
These are great videos. Your production is fantastic! Keep it up.
@NetworkDirection
@NetworkDirection 4 года назад
Thanks!
@kvr24611
@kvr24611 3 года назад
8:35 9.4.3.47 is a class A and would have last 3 part as the host address 203.42.62.1 is a class C and would have last 1 part as the host address 103.88.77.22 is a class A and would have last 3 part as the host address 151.10.13.55 is a class B and would have last 2 part as the host address and 222.127.16.4 is a class C and would have last 1 part as the host address
@TopNotch770
@TopNotch770 Год назад
Great videos! Thank you very much!
@Jazzadrin
@Jazzadrin 2 года назад
Thanks for these videos, loving them. They are very clear and the visuals make it much easier to understand. I'm hoping watching these and reading my text will help me get ready for my mid term next week. Do you have any content on understanding subnetting and subnet masks? That is the area I am most confused about so far
@Jazzadrin
@Jazzadrin 2 года назад
Like, you have explained the concept here... but in my class in expected to be able to answer a bunch of questions about subnetting and I still don’t really understand it very well. Oh well, just gotta keep digging in. Thanks again for your videos
@NetworkDirection
@NetworkDirection 2 года назад
Yep, a bit more in this series, and more videos currently in development
@tristanbradleymusic
@tristanbradleymusic Год назад
Excellent description sir!
@user-qv7on3dl9y
@user-qv7on3dl9y 8 месяцев назад
Hi there question regarding Classful addressing at 5 min 08 seconds. We were taught in my course that it's the hosts that get a -2 ie 16,777,216 hosts minus 2 is 16,777,214. Allowing for Network address and Broadcast address respectively. So same applies for B and C dropping 2 from the total hosts calculated.
@thomaswalther7276
@thomaswalther7276 3 года назад
Very helpful video. At time 6:44 ist should be "Class C" in the last of the three lines.
@ElreyRayo
@ElreyRayo 5 лет назад
Awesome tutorials!
@Qasimumar86
@Qasimumar86 4 года назад
thank you sir you have really worked hard to make it understand
@claritstv
@claritstv 3 года назад
Thank you for sharing this Information.
@NetworkDirection
@NetworkDirection 3 года назад
My pleasure! Thanks for watching.
@technoultimategaming2999
@technoultimategaming2999 3 года назад
I've watched 25 minutes out of 1hr 10 minutes of my lecturers video, where he explains sub netting and you did it in 15 minutes. Your video uses a lot of logic, as in 255.0.0.0 obviously shows it's a class A 255.255.0.0 shows it's B... it's the power of presentation that shows me this. And it's the power of presentation that allows me to learn the same thing much faster. Thank you
@1106896
@1106896 4 года назад
Hello, These are amazing videos for the network concepts, I would like to make sure my answers are correct, the link you provided for the answers are not direct enough, is there a way where I can check my answers for the quiz for all of your videos. I want to make sure I am correct.
@uweguevara3651
@uweguevara3651 3 года назад
In the subnetmask You're talking about 1 for the network and 0 for the hosts. Wouldn't it be more correct to say 1 for the Subnets and 0 for the devices. Example: For a very little SOHO wouldn't it be correct to put the subnetmask 255.255.255.240 ? E.g. with 4 workstations, a switch, a router and a printer? Thanks and regards.
@mitch4069
@mitch4069 2 года назад
Best video on this I've seen
@NetworkDirection
@NetworkDirection 2 года назад
Thank you!
@akshayhiremath4584
@akshayhiremath4584 4 года назад
Loved it! Perfect
@NetworkDirection
@NetworkDirection 2 года назад
Thank you!!
@ballajalloh974
@ballajalloh974 Год назад
Wow Becoming networker is my dream i hope this will help greatly.
@geogmz8277
@geogmz8277 5 лет назад
I really like your style of explaining these subjects.. Keep them coming man.. I hope you do one of ~ipsec~ or MPLS either way I'll be happy.
@NetworkDirection
@NetworkDirection 5 лет назад
Thanks! You can get some IPSec here:ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-4IRefeZ3vyY.html I'd like to do something on MPLS in the future. I'll need a lot of research before then :)
@geogmz8277
@geogmz8277 5 лет назад
Oh right! You already did the IPsec one I saw it the other day and did not watched it but doing it right now.
@NetworkDirection
@NetworkDirection 5 лет назад
Hope you like it. Let me know what you think
@franciskiriba8142
@franciskiriba8142 5 лет назад
hey i just love the way you are explaining. also do something on ubiquiti devises parameters eg what does CCQ mean?
@prakashmc2842
@prakashmc2842 4 года назад
Miga Arumai! Valthukkal!
@NetworkDirection
@NetworkDirection 4 года назад
Thanks!
@javierthewish
@javierthewish 4 года назад
Very cool video. Keep it up!!!
@SergioGarcia-gd6ti
@SergioGarcia-gd6ti 3 года назад
Amazing explanation, as always...
@NetworkDirection
@NetworkDirection 3 года назад
Thanks!
@lahorimunda18
@lahorimunda18 4 года назад
Hi, thank you for making this video. I am a little confused on 2 points; at 3:23 it states the network has 256 networks, but at 4:54 the same example, it says 128 networks. Am i missing something?
@AMan-yo3sy
@AMan-yo3sy 4 года назад
Hey, This is because of the reserved networks I think. The class A IP address scheme thingy is set up in such a way that it forces the first bit in the first octet to be a 0. This effectively rules out 128 networks, because that specific bit holds a value of 128. It does make me wonder why those are locked and what they are being used for then, because surely they won't be wasted?Anyway, Im not too good at this, so excuse the poor wording.. just trying to help
@randomnesslite
@randomnesslite 4 года назад
There was 256 networks on the old system at 3:23 , so to allow people to have more than just the 256 networks they changed it so there were classes that allowed more networks on the same 4 sets of bits (bytes). So if you think that Class A - E have to share the whole pizza (all the available numbers), Class A (which is limited from 0.0.0.0 to 127.0.0.0) gets half the pizza (which is at 4:54). But to make sure a host knows it's Class A the first bit is set to 0 (like a Post Code) . If you take the first byte 0.0.0.0 and turn it into binary -> 0000 0000 and the first 0 is always the same (so its class A) then the highest value it can have is 0111 1111 which is 127 in base 10 (normal numbers). This means that there can only be 128 networks in Class A
@iyiolapeter6554
@iyiolapeter6554 3 месяца назад
this is a gold mine
@maxwellstylo7906
@maxwellstylo7906 3 года назад
I love A+ hardware and im trying to get into networking, but the ip addresses has always been my hindrance. When it comes to the math I guess I get overwhelmed easily. Oh well, I shall keep trying. Thank you for the informative vids. Gonna have to re watch this one 3 times though lol, no fault to you though.
@NetworkDirection
@NetworkDirection 2 года назад
Don't give up! You'll get there with a bit of repetition and practice
@fetenetulu241
@fetenetulu241 2 года назад
excellent teacher long life!!!
@NetworkDirection
@NetworkDirection 2 года назад
Thank you
@jojogojo9318
@jojogojo9318 3 года назад
Great video👍👍
@ryanoleary4468
@ryanoleary4468 4 года назад
Love this so much, thank you for making these!
@NetworkDirection
@NetworkDirection 4 года назад
You're welcome!
@Yubbygucci
@Yubbygucci 6 месяцев назад
Sir very good video help alot ❤❤ which books do you recommend to learn more about network on 2023
@farrukhfreakkid
@farrukhfreakkid 10 месяцев назад
99% of these videos are amazing and tons of info, 1% bad is maybe giving the answer after the question instead of going to a website every. Just my opinion, one can argue your method is better for learning which i see that point too. Amazing nonetheless
@LunnieyNescense
@LunnieyNescense 4 года назад
Hi, I notice that in the example of CLASS C 6:00 you wrote 130.2.3.4 as an example but the range of Class C supossed to be at 192.0.0.0 - 223.255.255.0 I know that it's just an example to show which part of the network address and host address but am I missing something here?
@antoniokaram8189
@antoniokaram8189 4 года назад
You are right, he pointed it out in the comments saying it was a typo
@raducumihaicristian
@raducumihaicristian 3 года назад
What if we have the IP 224.150.10.0? The first octet would be 11100000 which cannot be categorized as class A, B or C IP. What about all the IP's of which the first bits of the first octet are not 0 or 10 or 110? Also my second concern is why would we use the concept of a subnet mask? I mean we are using two IPs. One is the IP that describes the network Id and the host ID and the other IP is used for the subnet mask. Why can't we use the IP of the subnet mask as the Network ID and the other IP for the host?
@snoo333
@snoo333 3 года назад
wow, learned a lot thanks.
@NetworkDirection
@NetworkDirection 3 года назад
So glad you did, thanks for the comment!
@milanmestka416
@milanmestka416 5 лет назад
Great vid, however @6:45 is a little typo, last class should be C instead of B. You say it right but slides has typo
@NetworkDirection
@NetworkDirection 5 лет назад
Nicely spotted! You're really paying attention! Yeah, I occasionally let a typo or two slip through.
@tanzeelrehman929
@tanzeelrehman929 Год назад
can someone explain how many hosts are actually left and how to work it out, honestly beautiful videos but i get confused at some bits like 6:20 when he says 256 hots left but he has written 255. Which one is it and how would i work it out? how would i know if lets say 255 is reserved and 0 is reserved, or is it the case that they are always reserved
@heartborne123
@heartborne123 4 года назад
is it some continuous adv of your web site?
@bulentemremmo6913
@bulentemremmo6913 3 года назад
I guess there is a problem at 6.14. 130.2.3.4 ip adress given to us has been converting incorretly. Converting 130 from decimal to binary should have been 1000 0010 instead of 1100 0001
@paulaganbi5236
@paulaganbi5236 4 года назад
hello, I have tried calculating the 16,777,215 figure at 3:33 but to no avail. how did you arrive at this figure? Thank you. Enjoying your videos so far!
@NetworkDirection
@NetworkDirection 4 года назад
Here's how I did it: 1. Open windows calculator, and switch to programmer mode 2. Click the binary button 3. Click on the bits 0 - 23 to turn them on 4. Look at the decimal number (it should be 16 777 215)
@fedegroxo
@fedegroxo 3 года назад
It's 256^3 i.e. the total number of distinct addresses that you can write with three octets (with each octet you can write 2^8 = 256 numbers).
@hamdha_zai554
@hamdha_zai554 3 года назад
Where can I find the answers for the questions given here???
@chiraggupta1557
@chiraggupta1557 3 года назад
Can someone please tell the answer to the last quiz?? Is it because the last 2 bits of the 2nd router are both 0 and only they constitute the host address..?
@itsdoofyjax
@itsdoofyjax 11 месяцев назад
You the best.....No cap
@NetworkDirection
@NetworkDirection 10 месяцев назад
Thanks @thedoofyworld! Im glad you liked our videos!
@vtrandal
@vtrandal 3 года назад
Okay, this is helping me. Thank you. How can I ask questions or comment on an answer to one of your quizzes? I just became a Patron to look at the answer to a quiz question [the one at 13:31 (Quiz 4: Why is the Device in Network A Unable to Reach Network B?)]. My comment on this question: It seems the network diagram could be a bit clearer to show the left router "belongs" to the left IP network and the right router "belongs" to right IP network, yes? Or no? Do routers "belong" to IP networks? It's not clear from the diagram which IP network they belong. Why don't both routers belong to the middle (30 bit subnet) IP network? I would sincerely appreciate an explanation, because I've been around networking for awhile without understanding how it works in detail.
@eathonslambert3968
@eathonslambert3968 5 лет назад
would you ever do lessons on server fundamentals?
@NetworkDirection
@NetworkDirection 5 лет назад
Thanks for the suggestion. However, I'm focusing on networking for now (both in my career and on this channel), so I don't think there will be any server videos in the near future. I really do appreciate the suggestions though
@bostjan3000
@bostjan3000 4 года назад
at 11:50, how do you know that is a class b network split into 256 smaller ones and not just a normal class C network?
@Somerandomdude-ev2uh
@Somerandomdude-ev2uh 3 года назад
Hi, Any chance you worked out the answer to this?
@nic1411
@nic1411 3 года назад
because the actual network is 172.16.0.0 which is a class B 255.255.255.0 is just the subnet mask, not the actual IP-address, I believe...
@athinaf8955
@athinaf8955 4 года назад
In the ranges of the classes, why do the not finish at an address with the form: x.255.255.255? For example, in the class B, the given range is 128.0.0.0 to 191.255.0.0 Why?
@dimasalang3221
@dimasalang3221 4 года назад
Because the first 2 bits are not used. If you convert the binary of class B, the range is only up to 191.
@cmyjones
@cmyjones 4 года назад
Maybe it's another typo, or maybe I don't get it yet, but how @6:27 the example IP for the Class C address is 130.2.3 when it's said that it starts only from 192?
@NetworkDirection
@NetworkDirection 4 года назад
Yep, a typo. I think I need to rerecord this one...
@cmyjones
@cmyjones 4 года назад
@@NetworkDirection hey hey that's drastic, maybe just a couple of overlays
@richardtheranger5214
@richardtheranger5214 5 лет назад
Thank you for this, I really do like these but you don't explain Subnetting and how you get the values that well. I have to go back and watch this again to see if it'll click. But overall a great video, thanks
@NetworkDirection
@NetworkDirection 5 лет назад
You’ll see some subnetting in the next part
@hobermallow5841
@hobermallow5841 12 дней назад
Yes, I don't understand this either. I just subscribed and am even more confused regarding Quiz 3a and the .240. It seemed like the concept was about 255 and 0 but then 240 gets thrown in there and I don't see how that equates to 20 bits.
@hobermallow5841
@hobermallow5841 12 дней назад
Conversions to binary and how many bits that yields to the network in a Subnet mask (I think): 128 = 10000000 (1 bit for the network) 192 = 11000000 (2 bits for the network) 224 = 11100000 (3 bits for the network) 240 = 11110000 (4 bits for the network) 248 = 11111000 (5 bits for the network) 252 = 11111100 (6 bits for the network) 254 = 11111110 (7 bits for the network) 255 = 11111111 (8 bits for the network)
@JotaEseUveA
@JotaEseUveA 3 года назад
Shouldn't be: Class C from 192.0.0.0 to 223.255.255.255 instead 223.255.255.0? Thanks in advance for such a great class.
@Heatlifer305
@Heatlifer305 2 года назад
Thank YOU!!
@NetworkDirection
@NetworkDirection 2 года назад
You're welcome!
@arinjayagrawal8434
@arinjayagrawal8434 4 года назад
When you say the first portion is used to network, what exactly do you mean by a network. Like a LAN?
@nekdo9590
@nekdo9590 4 года назад
Yeah, it could be LAN. Internet is a computer network that is divided into smaller networks by routers. You can think of router as a border between two and more networks.
@NetworkDirection
@NetworkDirection 4 года назад
The network in this case, is the part of the IP address, called a subnet, that identifies a LAN. In your network you may have multiple LANs, for example, a server LAN, a workstation LAN, etc
@rodionlim7069
@rodionlim7069 3 года назад
What does it mean at 12:25 when it says that devices in the same subnet but separated by a router are unable to communicate with each other?
@NetworkDirection
@NetworkDirection 3 года назад
It means these are two separate networks. Devices in different networks can't communicate with each other directly. Instead, they can send their traffic to the router, which forwards the traffic on their behalf.
@panzerofthelake1623
@panzerofthelake1623 2 года назад
11:20 now im confused at this part, why exactly did the third octet turned from 0 to 255 and why 256 instead of 255??? I need a much simpler and detailed explaination please, thanks.
@NetworkDirection
@NetworkDirection 2 года назад
Because of the subnet mask. This controls which part of the IP address is the 'network' part. We're only showing the network part on the screen. an 8-bit number has 256 values. But, counting from zero, that's 0 to 255
@eliagraceendaya1303
@eliagraceendaya1303 5 лет назад
Why do we need to uncheck IPV6 in typing ip address?
@unixware6453
@unixware6453 3 года назад
THANKS !
@NetworkDirection
@NetworkDirection 3 года назад
You're welcome!
@uweguevara3651
@uweguevara3651 3 года назад
13:54: Because Bits 24-29 are interpreted in a different way by the 3 networks? The little one in the middle interprets them as part of network address, where as it's an internal one?
@RicardoValero95
@RicardoValero95 3 года назад
@Uwe Guevara I think that the mask /30 is 255.255.255.252, which leaves only 4 hosts available, so the range is .0 - .3. So 172.16.2.20 is out of range? This is my guess
@aszh
@aszh 2 года назад
@@RicardoValero95 can you explain this to me in more detail if possible ?
@clayandro
@clayandro Год назад
@@aszh Ricardo is right. The .20 address from the right router does not fit in the IP range from the /30 subnetmask.
@thilinaalagiyawanna3680
@thilinaalagiyawanna3680 Год назад
Thank you very much
@NetworkDirection
@NetworkDirection Год назад
You are very welcome! Thanks for watching!
@vtrandal
@vtrandal 3 года назад
Can anyone give an example of two devices in the same subnet but not in the same IP network? [Concerning 12:08 in the video.] For classless networks doesn't "same subnet" imply "same IP network" ? At first glance yes, but then these subnets can be reused somehow, yes? If so then it's this reuse of subnets that expands IPV4 addressing greatly .AND. allows for devices on the same subnet to be part of a different IP network, yes? No? And to respond to your question at the end: I agree that classless networking + superneting is the future (and has been) for awhile!
@th3gam3rsloung37
@th3gam3rsloung37 Год назад
I'm as blank as a paper, but it's slowly starting to make sense to me👍
@uweguevara3651
@uweguevara3651 3 года назад
12:56: We have to count the 1s and calculate 2 exp n. So in the first example we have 2 exp 16, in the 2° we have the maximum of 2 exp 20 subnets. The number of addresses per subnet we calculate like this: 2 exp (number of 0s), what is 2 exp 16 in the first and 2 exp 8 = 256 in the second case. Right?
3 года назад
Hi one question. What do you mean with the "fixed bits"? I mean like in 06:16. "130" is not represented by 1100 0001. Rather it would be 1000 0010. I dont get the point. Besides this great work. Thank you.
@NetworkDirection
@NetworkDirection 3 года назад
In the original 'classful' type of IP addressing, the first few bits represented the class. At 6:16, the first three bits are '110', meaning that this IP must be class C. However, don't focus on this too hard. Focus more on how Classless IP addresses work
@sonnyvieng3516
@sonnyvieng3516 3 года назад
Little typo at 6:44 When you say "Class C", it's listed as Class B again. Just so there's no confusion if anyone else caught this
@DEDEPLDEDE
@DEDEPLDEDE 3 года назад
cheers mate
@NetworkDirection
@NetworkDirection 3 года назад
You're welcome!
@tushitapatel5782
@tushitapatel5782 3 года назад
Would anybody be able to help answer the question at 13:47, please? I don't understand what belongs here and why there are two addresses on either side of the routers. What does that mean? Why can't router A direct the message to router B? TIA.
@tushitapatel5782
@tushitapatel5782 3 года назад
I understand that it probably has to do with 172.16.2.20 does not belong in the networks that 172.16.2.0/30 supports, but it is not clear to me why there are two hosts on either side of the router and what they mean.
@debbiec855
@debbiec855 3 года назад
Best tutorial ever !
@NetworkDirection
@NetworkDirection 3 года назад
Wow, thanks!
@dugna1
@dugna1 4 года назад
Can you elaborate at 5.59, how did u get this figure 192-255.0.0 Thanks
@NetworkDirection
@NetworkDirection 4 года назад
do you mean on the 'Class B' slide? I can't find the part you mean.
@Dan-bm1ug
@Dan-bm1ug Год назад
The problem at 13:40??? Is it the you cant have .20 at the end of an IP the is /30 because the max you can achieve with binary is .3?
@noone6896
@noone6896 4 года назад
The right router, shouldn't it be 172.16.2.2 (not 172.16.2.20)? Bcauz if it has subnet mask /30 it can have only 3 hosts. thank u for ur help!
@kylecheng7155
@kylecheng7155 4 года назад
why does subnet mask /30 only have 3 hosts?
@noone6896
@noone6896 4 года назад
172.16.2.0 is network itself. and 172.16.2.1/2/3 is 3 possible hosts ... in my opinion
@forevolution88
@forevolution88 4 года назад
I think it would mean that only 2 hosts would be allowed, as hosts cannot be all 0's or 1's, so it would either be 2.1 or 2.2
@rachitsrivastava4811
@rachitsrivastava4811 4 года назад
sir i have a problem, class -c ip address given was 130.2.3.4 so in binary it is 10000010.00000010.00000011.00000100 but you said that class c starts with 110 so how can this happen?
@apar3258
@apar3258 3 года назад
Yes, that was a mistake. Anyway, the binary value mentioned there converts to 193.xxx.xxx.xxx which exists within the class C IP range.
@gg.wellplayed
@gg.wellplayed 2 года назад
12:20 Why same subnet separated by router will not communicate? What is the violation made? pls. clarify
@NetworkDirection
@NetworkDirection 2 года назад
Good question. The purpose of a router is to 'route' or 'forward' network traffic between different networks. To make this work, a router needs to know where this network is If we split a single network (a subnet) into two parts and separate it by a router, the router won't know which one is valid. It won't know which packets to send to one part, and which to send to the other. For completeness I'll mention that there is a small exception to this, which is using a technology called 'proxy ARP', however, it's complicated and beyond the level of this video Hope this helps!
@itch1428
@itch1428 4 года назад
What is the thought process behind having fixed bits for every IP class? Why are they there?
@NetworkDirection
@NetworkDirection 4 года назад
That was really old thinking, back when they thought the internet would only be used by governments, universities, and massive companies. The fixed bits (classful) addressing is no longer used in practice, although sometimes people do refer to 'class-A' addresses and so on.
@matsiekoketso7532
@matsiekoketso7532 4 года назад
Thank you
@NetworkDirection
@NetworkDirection 4 года назад
you're welcome!
@relax_user7230
@relax_user7230 Год назад
I still don’t understand where you got the 256 from? 11:54
@Comment_-nw2rp
@Comment_-nw2rp 3 года назад
If you want a quick overview of CIDR and want to skip the classless routing, skip to 8:47
Далее
IP Addressing in Depth | Network Fundamentals Part 5
20:34
How the OSI Model Works | Network Fundamentals Part 3
16:51
can you repeat it? #tatyanadiablo ##shorts
00:11
Просмотров 1 млн
надувательство чистой воды
00:28
Cisco CLI for Beginners | Network Fundamentals Part 10
32:33
Subnet Mask - Explained
17:55
Просмотров 2,6 млн
Why 3D Printing Buildings Leads to Problems
15:44
Просмотров 208 тыс.
we ran OUT of IP Addresses!!
16:49
Просмотров 2 млн
subnetting is simple
13:33
Просмотров 2,4 млн
How TCP and UDP Work | Network Fundamentals Part 7
10:53
iPhone 15 Pro vs Samsung s24🤣 #shorts
0:10
Просмотров 9 млн
Плохие и хорошие видеокарты
1:00