Cisco Training CCNA IP Addressing - Part 4 of 5

[Mahmoud13185]

you remind me with my first year in college, Brilliant

[wickedmind92]

Brilliant! I understand all whole lot in here! I'm ready for test now!!

[MrEdhr]

wow thank you for this it has brought light before my eyes

[masjidsalahuddin]

Hi I made test in chapter 1 of ccna with my classmates i want to ask if someone knows can i see the grades of my classmates ?

[TheAwesomeSplodge]

I'm finding it hard to understand when the subnet contains a number for the host portion of the address. For example, if you use 255.255.255.240 as a subnet, does that mean that the network address is 172.16.1.1x? (x being the host).

[billyshears1000]

@TheAwesomeSplodge

No, the network address would be 172.16.1.240. You would then have 14 hosts (from 172.16.1.241 to 172.16.1.254)....172.16.1.255 would be the broadcast address.

Cheers!

[1adnanbhatti]

its logical OR combination of two binary bits not logical AND combination.logical AND is the multiplication of two binary bits. i have much better knowledge of logic gates

[avvidme]

@1adnanbhatti Not its not. an "OR" would mean a 0 + 1 or 1 + 0 would create a 1 result. An "OR" would also mean that a 1 + 1 would be 0. Unless it's an XOR in which case it would be a 1.

Obviously none of these are the case - it IS a logical AND.

[ibrahemazad]

it's great presentation

so many thanx

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[MrLightbinder]

good video

[unclerichard215]

Why then do we need to learn about different classes if subnet mask is now defining the new "classes" for us now ?

[mynewschannel]

@unclerichard215

The subnet does not define the class the first 3 bits of the address that define the class go to 6:48 to see this.

In the example class B and class C both use a subnet mask of 255.255.255.0

[unclerichard215]

What's the difference between a VLAN and a subnet ? They sound the same !

[vireshtyagi1]

@unclerichard215 Vlan is a layer 2 (datalink layer) concept whereas Subnetting is a layer 3(network layer) concept.

Hope it helps, although its too late..xD

[Kcon83]

Always good to re-watch it all again :)

[zdye14]

Hi John,  I'm confuse on part 6:56. As you have said in your previous videos, a class A IP add has 8 bits network and 24 bits host. How come the subnet of 10.9.15.3 is 10.9.0.0? What determines the class of an IP address? Is it the first octet or the subnet mask?

[crazycutz]

@zdye14 - was wondering the same.

[liquidsprout]

@zdye14 @crazycutz - It's only the first few bits which determine the network class (0, 10, 11 for A, B and C respectively). A class A IP address will only use the first 8 bits for network addressing when subnetting is not used. This where the subnet mask comes in - it tells you which bits are used for network addressing and which bits are used for host addressing. In this example, the subnet mask is 255.255.0.0, so you've 'borrowed' the second octet of bits to use for network addressing.

[wartem]

7:18 - 8:30 is the easier part.

[sunflear]

@jetpaq i felt the exact same way amazing :D

[jetpaq]

Tremendous! I have never actually "felt" a brain cell Grow regarding IP adressing till now! Thanks for being so clear. I really never saw binary conversion so simply before. You are wonderful.

[TheBestMixBeats]

thank you

[mteeheet56]

Thanks for taking the time to make these videos.

[dkniles1]

Mr john Mills,many thank you and respect for your excellent work!

greece

[dkniles1]

Mr john Mills,many thank you and respect for your excellent work!

greece

[MrDpatrick]

OK, to make a comment about how Americans use the English language is a little arrogant. There is a pronunciation difference between us. We made it a point to be different when we escaped from the tyrannical monarchy of England. Pancho!

Thanks for the videos,

[fkeyman]

Thanks a lot. very well explained.

[fkeyman]

Thanks a lot. You have made a difficult subject very simple to understand.

[olimpicsa]

@panchotraining

keep up the good work, useful stuff.

[Pacman2608]

Thanks!

[ds1961ds]

Excellent video. Very easy to understand.

[Cywreck]

Excellent explanation !!

[coliban]

Thank you again. I think, i knew it all, but it is good for restoring old knowledge :-))

[AeKDzTeCh]

In the logical operation AND represent by x and the operation OR by the combination +

[acehoney71]

Also, i'm getting confused at 5:26 on...shouldn't the subnet mask/subnet for the first IP (172.16.5.33) be 255.255.0.0/172.16.0.0 since it's a class B address? The second IP (10.9.15.3) subnet mask be 255.0.0.0 and the subnet as 10.0.0.0 as it's a class A address? Any help in understanding this is highly appreciated.

[acehoney71]

Hello John - I'm very confused. My theory is that 172.16.2.17 is a Class B IP with 255.255.0.0 as the Subnet Mask. Why now is it a Class C IP? Please HELP!!!!!

[getvickyslove]

I do not understand this which is at 6:08 of this video

IP 172.16.5.33 is representing a CLASS B IP address.

Then the 1st and 2nd octet is network and the other 2 octets are hosts.

But he says the 1st three octet represents network and the last octet for host.

This one confused me. Apart from this, the video is fantastic

[waltersdny]

I am using your videos to teach my 12th grade seniors about IP numbers and subnetting. Your videos are very clear and easy to understand! Thanks!

[paulnathanielsmith]

10/10 thanx! very useful info to practise with 5stars for you

[artistdigital]

Logical AND is represented by a DOT not by a +.

[jjsoft11]

Thank you so much. Especially about explaining the class in a wonderful manner. Thats the best i have come across so far and was easy to grasp.

[khalid799713636]

would you say that we can also use Cisco switch ad side from router , does it work the same as much as router , and what thinks are going to be register on mac table only ip add , or ect , , and when do we need to use from unic caost , and could you say that in how mony ways braod caostings are happen ,,,, any spesifice resion for braod caosting ,,,,, thank you from your nice videos ,,,,, looking forward for your farther instructions by video ,,,,, thank you ,,

[fantazia1234]

don't look for mistakes guys just try to learn

[rees3901]

would be a bit clearer if there wher animations , eg : when he talks about ip and subnet masks and starts goin throughn them i lost track , if the where highlighted a bit it would illustrate what he's doin and why

not a dig , just a suggestion ...

apart from that ecxellent videos

[bazrin]

Man this was great!

[russ98stang]

At 7:01, he says the address is "192.198.17.23.44"..... This isn't an IP address. Where did he get the 192 from?????????

[2882890]

He made what they call a mistake, and he rectified it as he went. Have another listen.

[surrealpast]

Your kidding right?lol....He accidentally said 192...come on man!

[dankotdq]

I really like these videos. The only that I think is not ok is that he uses a "+" operator to simbolize the logical AND. I don´t know why they do that. BTW these videos are great!

[BigBurnouts]

THANK YOU

[karandtc]

thank you sir.

[d8thangel]

That was easilly to understand. Cool!

[stewartgary999]

Thanks, very good of you to do this, excellent job!!

[TheAgeOfL0ve]

The classes from 5:26-7:03 are wrong :(

[russ98stang]

How are they wrong??? I think you are wrong.

[weedyweededweed]

very, good, i'm passing ccna in a bit...

[getcarter15]

the only thing that dictates the class is the first few bits of the address, as mentioned in an earlier video. The subnet mask does not dictate the class of address although 255.255.255.0 is default for class C, 255.255.0.0 for class B etc. they don't have to be used like this though

[Yakandke]

Yes this vidoe is wrong and is confusing me at 6:20 subnet mask exercise. My Network+ fourth addition says network class A subnet mask is 255.0.0.0

Network class B subnet mask is 255.255.0.0

Network class C subnet mask is 255.255.255.0 his numbers are wrong

[hingerty]

I agree, was he using given masks? To my way of thinking the address with 10.x.x.x should have been class a. I liked his first couple videos but Im gonna have to cut him loose. I prefer t when they give you the /X notation.

[dacman95]

They are not wrong, he never says "default mask" only say "subnet mask exercises" you can use de subnet that u want if are what u need

[Yakandke]

I thought class B was 255.255.0.0

Class B 16-16

[Yakandke]

YES but he is confusing us by using a class B address to demanstrate a class C subnett address.

[russ98stang]

He is not, you are confusing so shut up. He is not talking about default subnet.

[Yakandke]

russ98stang shut your ass up and learn something!!!

[gurujeeno1]

great tutorials thanks very much!

[punxz18]

where did you get 255.255.255.0?

[UltraMorado10]

255.255.255.0 is the default subnet mask for a class C address

[geovanni]

Thanks for the knowlege. This is the best subnet video I seen.

[babasdad]

GREAT VIDS, MORE PLEASE VERY HELPFULL

[bamidele112]

Great job make it look simple

[sam1983h]

nice job

[knmleaguecity]

Agreed,

Please do some more.

[mast600]

Tq very much

[Psolorious]

would like to see much more about other protocols!keep up good work!

[GuyaneseRomeo]

thanks again!

[darkling21]

Very simple and understandable presentation

[shamilt1]

Great Job, this cleared up several questions I had about ip addressing.

[theshadow106]

All 4 video on IP addressing are the best I seen yet

Would like to see much more