Subnet Mask

[SteelFoundation]

is he talking out of his butthole?

[farid551000]

men you are cool but you had a one mistake ...

A class adres ..starts from 0- 126 not from 0- 127

Thats a big mistake Because

127.0.0.0-127.255.255.254 it is a loob back adres

and in ip sec we use only abc ip groups ...d is not in a use...

Be carryfuuuuuuul

[orbital92hotmail]

I cant fucken hear you

[mysteriously01]

crap audio

[MrBlenderMan]

what relevance does it have to say that we "subtract 24 from 32 bits" to get the remaining host bits? :p

[unrewritable]

Thank you very much for the tutorial bro! keep them coming!

[berryboy2006]

lulwut?

[losamigosrecords]

the subnet mask tells us what our network id is

[DennisFranz]

what?

[sagetajr]

how can 192.16.254.129 be a class c address

if the second and the fourth octet are below 192

doesnt it suppose to be between 192-223?

[stopthepolicestate]

The video is somewhat helpful even though the audio is too low. Although toward around the 7:40 minute mark it becomes even worse audio wise. I think it would be real cool if you would at least repost the end of this vid so we can hear the final explanation. You seem to be able to explain decent which is somewhat hard to find and if you fix the audio, your channel will be awesome and we all will learn a lot. Thanks..

[01smt]

hey here it says network address has 1 binary and host address has 0 binary...shouldnt it be the other way???

[YoniX50]

get a mic that works

[Markohoppis]

I don't see the reason for a subnet mask.

I understand where the 255's come from now, it's all 1's written in binary code, and the three octets are for the network, but the reason for it and how it relates to the 192 address or the ip address on the internet isn't explained. Seems to have no function.

It's impossible to find an explanation of this.

[HmoobVue19]

@Markohoppis 255 is 11111111

the 1 represent each binary numbers. Example 1 2 4 8 16 32 64 128 are binary numbers and is equals= to 255 meaning 11111111.00000000.00000000.000­0000. so it'll look like 255.0.0.0. if its 255.255.255.0 it'll look like this 11111111.11111111.11111111.000­00000

192 in binary would be 11000000.0000000.00000000 and so on. Hope it helps

[rdmustang]

@Markohoppis

The subnet mask tells a system whether to send traffic to another network (route it through the gateway) or to send it direct.

Think of it like this:

If you want to send a letter to your neighbor you just place the envelope in their mailbox directly since the neighbor is near you (on the same subnet). If you want to send a letter to someone further away then you give it to the mailman to deliver (you route it through the gateway since the recipient is on a different subnet).

[maxshortte1982]

nice vid!!! audio wasnt too good, but i liked the slides

[SaluJee1]

...quality of sound is not good..

and CLASS A adress is 0-126 not 127...

127 is the loop back adress to check the whole network like ping 127.0.1.1

[DEATH2HOMOS]

HOW MANY COCKS HAS THIS GUY SUCKED?

[tariq101]

you sound like a robot

[unlokia]

What on EARTH was going on with your audio?. I would never allow such poorly made video to represent my reputation online.

[1hackerwannabe]

I'm sorry but you commit mistake class A must be 1-126 and class B is 128-191. any address with a first octet of 127 is reserved for loopback interfaces. if you ping 127.0.0.1 you actually pinging your own pc.

[126644]

and class C is where the first octet is between 192-223. You know Technically the internet can only support 127 class A IP Addresses while the internet can support several million class C IP Addresses isn't that weird o well I can't wait till everyone goes over to IPv6 thats if they ever do

[gvgundas]

audio is low

[iamrta1]

couldnt hear it with my laptop

[damnedwhatuser]

really bad audio performance

[cferguson0108]

Yeah that is what happens when you try to use the built in mic. I now have a headset, so if I do anymore I will use the headset and the audio should be better.

[MrCabal]

Scott Barbee - sgb0321 - ICTN 3250 Review

Subnetting is a tough topic to cover in 8-9 minutes, but this was a fair job. Since the focus was classful subnetting, Class D should have been left out or just mentioned as multicast addresses.

Another useful topic would be how the classes are divided: Class A, first bit is 0, B - 10, C - 110.

The video also assumes viewers understand binary notation, so a quick explanation and/or chart would be helpful.

[mrpotatohead1342]

Burns Mijanovich - blm0616 - ICTN 3250 Review

Good choice of topic, good presentation, and good length. I was glad that you talked over your slides, it made the video much more accessible.

There were a few technical inaccuracies. First, "Slash notation" is actually called CIDR Notation, for Classless Inter-Domain Routing. Second, there is no default subnet mask for a Class D address.

Overall, I thought the presentation was very informative. Good job!

[dhester24]

Derek Hester - ICTN 3250 Review

Overall good video. Good explanation of subnetting. Good visual with the slides and the cursor which makes it easier to follow. Good presentation of information. Good Job!