TCP/IP and Subnet Masking

[bizbite2]

Thank you Sensei

[cwaddle]

I haven't watched this yet but it has a ridiculously good rating and many ppl appreciate your video. I sense that this will be a great video. Thank you

[cannabishead4420]

At first I admit I was a little irritated that he chose to reiterate as much as he did. But in the end I walked away knowing what the hell he was talking about lol. So thanks for the awesome vids. Definitely going to have to check out some of the others.

[Tymerman1]

thanks this cleared up some partiall parts of subnet mask, but still need more info on calculating number of host/ networks by looking at the IP address and subnet mask. if all goes good i shall be able to pass my cisco test tomorrow. thanks for the lesson

[zahnenlindie]

Thank you so much have exams tomorrow you made it understandable. Thanx From , Margate South Africa

[anzwertree]

This was unbelievably helpful 

[SickTechShow]

Any body here use Cisco packet tracert? :D

[qulbadeen2009]

@SickTechShow yes

[nathalie520]

I wish you were my professor. Mine just reads off his powerpoint slides and we only see him once a week. ...he hardly teaches.-_-

[SickTechShow]

@nathalie520 Lol! Mine does the exact same. We must go to same university haha

[nathalie520]

@SickTechShow lol.i go to saint johns

[MrStetsonator]

This guy rocks. helping me cram for a test.

[MrTobious]

Audio is working fine for me i dont know what everyone is complaining about, it only comes out of one channel for me so maybe that is why some users cant hear any sound. Aside from that Awesome videos Eli, really learning some great things from your tutorials!!!

[Juilkca]

the audio is not working! Please fix it because I really need to learn this. Thanks!

[conwayallday01]

At the same time IT has grown so much that you can't make a living just knowing subnetting/VLSM/CIDR and basic stuff. The hardest part of learning IT is applying it. One thing colleges are sub par at IMO. I excelled in this type of material in college but when put into an MDF with thousands of cross connects for voice/data and patch panels book knowledge isn't much help. The info has always been out there anyway.

Excellent videos and great learning and/or remembering tools. Good work.

[conwayallday01]

It is good to want to teach others, but everyone who works in IT knows the problem IT with paper MCSE/CCNAs. Considering many folks had to pay many tens of thousands of dollars and sit in classes for 8-12 hours a day for years and years (5 for me). I'm not sure how I feel about videos like this. On one hand it is good to teach your fellow man, on the other hand it is important to protect your investments. I along with thousands of folks paid a huge cost for this information. Here it is 4 free

[DeAdmAnBboy]

Wonderful video, really loved it n appreciate it. Wonderful work .. thanx alot

[KoeniggseggCCX]

I really didn't know that the packets are sent doubling the number of the packets.

I thought that packets were sent one by one.

I'm from Brazil and graduating with Computers Network.

Thank you teacher, this video helped a lot.

Subbed!!!

[albertphillipstanley]

now i want a double double from in-n-out 16:22

[scottChapman25]

thank you so much on how you broke this down! I'm going into my second year of network engineering at school and I'm in my network class now and my teacher isn't explaining it very well to us, now I feel like i will make a great score on my test tomorrow!!! I will def subscribe to your page, do you have a facebook for me to follow aswell?

[spyl42]

I have 0 background in networking, and this video, though it contains complex concepts for a layperson, made perfect sense. Eli is a superior teacher as compared to all the other instructors I've sampled on this topic on Youtube. Thanks, Eli!

[Mattofwar]

audio is only playing in one speaker your other vids are fine

[UX2teo]

thanks pro. u help me so much ....u r greatteacher

[demonicsyndrome]

If only all computing folks were like you :D by far the EPICEST comp teacher I've come across

[sagargdeshpande]

Great job,u saved me from the finals

[gmedia78]

This filled in so many of my knowledge gaps. Thanks!

[Blissful214]

Thanks sir,... God Bless! it helps a lot ... Good luck to me on my coming work as Network Technician... =)

[KingUK]

Good video. However, networking is a very precise field and there are quite a few mistakes in this video. Perhaps Eli is just trying to simplify things. If you're studying for CCNA or Network+, take this video with a pinch of salt.

[kashch]

great video. Thanks for the detailed info

[lovesnake01]

i am sorry bro there is no audio please do something to correct it

God bless you



[elithecomputerguy]

@lovesnake01 Try it now. Sometimes YouTube acts up. I just tried it and it works.

[dragonking700]

"eXcetera" :P

[cutwater65]

Thank you..you rock..

[infowaredm]

26 years old and proud to say started with computers when there was 56k modems ohh the fun days.

[Dread077]

i hope ur gettin paid lots for what u do, it seemed difficult at first but u explain it perfect.. exspect many messages an questions from me in the future thanks teacher.. on to the next lesson..

[saadan92]

1 dident understand english. :b

[Masterwid]

Why do I even go to school when I can watch this? It's not even my native language and I learn way more!! Great work my exam will go smoothly.

[xRuFFZx]

nice tut. .. but upload in stereo plz .. its 2012

[balikesier]

Hey Elli Can you make videos about CCNA. I love your teaching style.

[newimprove09]

In the IP protocol what is the purpose of the network mask of the network address? Please provide some examples

[shenliang577]

Thank you, thank you, many many thanks. Wonderful lecture, clear, detailed, good structure, and interesting! 

[diwash123]

Best video as usual,,,thank you Eli

[AmalMohameed]

Hi, Thank you for this helpful vedio. mmmm I have a question. If I have an IP address 195.20.13.0/24 and I have hosts of 7 computers. I want to know what is the: Number of bits in the subnet IP mask (binary) New IP mask (decimal) Maximum number of usable subnets (including the 0th subnet) Number of usable hosts per subnet IP Subnet First IP Host address Last IP Host address: Hope anyone help me with this as soon as possible. Thank you. Amal

[ClaytonDM]

This video was incredibly helpful. I studied networking for about 2 years in college but did not finish my degree. That was about 5 years ago. Recently I landed an entry level desktop IT position and since then I have been trying to rebuild my skills. Your video took all the terms I was already familiar with: NAT, windowing, dns, dhcp, etc., and put it in an overview format that tied it all together. I am now subscribed to your channel and will be watching more of your videos. Good work!

[sharanash1983]

iam realy big fan off you i watch u r video network layer before it was very usefull in my class

[sharanash1983]

thanks for information

[SuperLuc4469]

exam tomorrow and I feel more better about it after watching this. Thank You Sir, great video!

[DOVAN16]

very useful

[Msigler19]

Great video, thank you Ely!

[belgeu]

very good. simple, understandable, as result interesting. thank you

[MrLandoA]

Hey big guy! I really appreciate this video and the way you teach. I am a student and you have made me understand much easier than my professor.

Greetings from Costa Rica. I will recommend your videos.

[deathbite0]

Hey Eli, I think you've made a mistake in your description of the three-way handshake starting from 10:12 ...the ACK (acknowledgement) is a +1 from the sequence number last received. So if the last packet received by PC2 is packet number 4, it sends an ACK to PC1 saying "Hi, I received your packets and I'm expecting packet number 5". That aside, I thoroughly enjoy your training videos, hence the subscription :) 

[MsTroubleshooting]

NAT- there are individual IP's for every external IP, but "there are not enough IP's in the world for every network to have an individual IP"?

Thats what the video says right before you do a recap at around 40min or so. Is it because IF my external IP is the same external IP as a guy on the other side of the world we will not have the same INTERNAL IP? Therefore we all have the same IP's but they dont mix up our packets because our internal IP's are different if our external IP's are the same?

[balikesier]

Sir,

I like the way u teach!thank you

[Fanhoood]

thanx 

[namal786]

Awesome lecture. Thanks much :)

[MrSuspiciousPerson]

So this is what we should watch BEFORE "hacking DNS" right, Eli?

[TheLeozeppelin]

I've learned networking plus English! from Brazil =)

[Jagddk]

dude i love you

[werdnativ]

Just a clarification, the link layer IPv4 and IPv6 are different, but the TCP layer is still the same. It's confusing to call it "TCP/IP version 6".

[molotv]

the interesting thing is, that you totally look like my actual networking teacher

[mjnb77]

o_0 I should really go to bed.

Subnets. I get it but I don't. "I" set my computer to a subnet..... so.... can I set it to 0.0.0.0 and talk to every other host....? Or is it set on the server/router/dhcp that controls the network...? If it is.... then why do I have an option to set my own subnet.... ?

*head explodes*

(I can confirm that I did or didn't click on the ad)

[MsTroubleshooting]

@mjnb77 The subnet is divided by "Network Identifiers" and "Device Identifiers". Device Identifier is the host. Octets are divided into 8 bits starting at "1" and doubling for 8 spaces. There are 4 octets in each subnet. If you add an all of an octet up you get 255. So if you want between 0-255 for your host you add up the bits in the last octet, which is Device Identifier, CLASS C Subnet (most common) is 0. Fancy ie "192". would be "1" and "1", in the first two spaces of the octet and the rest0

[smokenfly514]

Why would your router not give you a new address through DHCP?

[smokenfly514]

THANK YOU SO MUCH

[shlakser]

Just professional and great.

The greatest e learning I ever had !

Thank you very much !

[Holywar101]

Great video! I really like how you always review and give me plenty of time to take notes. Thanks for sharing your knowledge with the world and not making us pay for it!

[mahali001]

great job,same subject needs more details...

[aspinrin2001]

Great work , thanks alot, i really appreciate ur effort ,and ur way of teaching is very good and easy to understand for anyone in networking before . i will also subscribe

[Rigpa7]

I'm subscribing you because your way of teaching just makes it all connect and makes sense a lot. Great teacher. Thank you, Eli!

[scout6686]

nice work

[joetube1988]

Great Job Orange T computer Guy!! =P =)

[pcmed365]

nice video. Just a note. DHCP stands for Dynamic Host Configuration Protocol

[viilips]

would be cool to hear more about subnet mask calculating.

[Mackinstyle]

Today I learned why "you're as popular as a class D subnet" is funny...

[seandeyoung01]

Awesome work! Your were born to teach IT. Have an interview tomorrow and need refresher and you laid it out there. Thanks!

[SuperKittyPancake]

I click on the ads because I like your videos.

[elithecomputerguy]

@SuperKittyPancake I can neither confirm, nor deny that I really appreciate that... I'm glad you like the video. I'm about to go down and shoot a one...

[SteelFoundation]

@elithecomputerguy Great video Eli.....its people like you who make the internet such a valuable resource ;-) keep up the good work , and know that your vids are appreciated :) from a Cisco student ...

[heroics03]

I needed some refresher courses. Damn, thanks for making these videos. They are great!

[orbital92hotmail]

He is good, my teacher was way too quick. He also looks gay as fuck.

[nymetsfan912]

I too wish I had you as a teacher. My professor goes a million miles per hour and expects you understand everything he talks about. You make things very clear and are very well spoken. I gain more knowlege with your videos than I do in class and that's real talk. Thankyou for taking the time out to help others! --John

[BumblebeeSwift]

1 hr later..*opps, i forgot to press the record button*

[safiarpolla]

Well done mate, but not everything you saying are correct. Three way handshake is wrong!!

1>1

[dwaynelucas]

very good explaination. very well said!!!

[DCsWiseMan]

Good job man

[jasahasch]

Wondering about valid IP addresses under subnet mask of x.x.x.128 ... there is avalible two subnetworks, subnetwork 1 (x.x.x.0) with a valid ip range of 1 thru 127, ... subnetwork 2 (x.x.x.128) with valid ip address range of 129-254. Is the math correct?

Thank you, excellent videos, man.

[mmullins942]

ORANGE SHIRT!!!

[petetomney]

Agree Eli makes TCIP sound real simple - The best video I've found for getting a general understand of TCIP - Thanks Eli

[Dwynyth]

I wish i had you as a teacher Mr. Computerguy. Really good explanation!

[45252511]

hi Eli listen i like your videos a lot, i want to say thanks. great videos. i hope to see more of this videos soon, and listen why don`t you use the entire whiteboard to write things down. so we can see better :-)

[sarajonde]

THank you so much....this is a very gud video which help me a lot....thank you ....language is very simple to understand the complicated thing....i like your diagrams...the computer with smiely and the the printer,,,, :) ...hope to see more videos....thanks again...

Sandeep,B

(India)

[Inzolity]

I already knew much of this information as of 25:00 But it's so nice to get the basics refreshed. Thank you so much for uploading this! :) I have my ccna exam soon. Hopefully it'll go well

[ari802002]

great teacher thank u very much

[dulaone]

This guy is a great teacher. But his hand writing needs improvement LOL.

[kenshinous]

Thank you Eli. This guide has helped me a lot with my final year exam for Networking. I hope to see more guides coming from you in the near future.

With much respect, thank you!

Ken

[mayarbacha]

Thank you Mr elithecomputerguy I think you are excellent at explaining things to slow learners and I think you are genuinely good person at heart. Thank you very much

[kydjg]

You will never have any idea of how much your videos have helped me; they are amazing, In this short one hour video I have learnt more from you than I had from 6 months studying the TCP/IP basics at Univerisity.

Thanks so much, and p[lease do keep up the great work.

[TheJeromeferreira]

Nice, always good to go back to basics. Excellent video even just to recap if your a network engineer.