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 Forum index » Advanced Topics » Additional Software (PETs, n' stuff) » Network
Do we need IP address plus MAC address?
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inherit2

Joined: 23 Jun 2014
Posts: 8

PostPosted: Mon 26 Mar 2018, 09:55    Post subject:  Do we need IP address plus MAC address?  

hi,

My question is rather general. I just wonder. Why do we need IP addressing whereas we have MAC addresses. It seems like doing double work. Why hasn't it been possible just to rely on MAC address globally? Why it can't it be that all computers throughout the world are assigned with MAC addresses. Why couldn't we establish sth like MAC-Global-system. Why did internet creators introduced IP addresses.

You live in you home and you have one address, which is globally valid. Be advised that all MAC addresses are unique globally.


thx
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bigpup


Joined: 11 Oct 2009
Posts: 10863
Location: Charleston S.C. USA

PostPosted: Mon 26 Mar 2018, 10:29    Post subject:  

Welcome to Puppy Land!

You posted this in the wrong place in the forum.
This section is a place to post programs/software about Networking.

Please help to keep some order to this forum and post questions in the Beginners or Users section of the forum.

Thanks!

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Burn_IT


Joined: 12 Aug 2006
Posts: 3160
Location: Tamworth UK

PostPosted: Mon 26 Mar 2018, 10:33    Post subject:  

That was the original idea - to make every single device have a separate mac address, but unfortunately mass production and in an effort to reduce costs, manufacturers start using generic mac addresses.
Plus spoofing mac addresses is too easy.
IP addresses are not unique either since routers hand out local IP addresses to local devices.

IPV6 should solve that problem, although better control, even of that, is really needed.

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inherit2

Joined: 23 Jun 2014
Posts: 8

PostPosted: Tue 27 Mar 2018, 12:18    Post subject:  

Burn_IT wrote:
, but unfortunately mass production and in an effort to reduce costs, manufacturers start using generic mac addresses.

I am not sure if I get you. generic mac address - what do you mean by that? So is it bad that mac addresses are generic/general?
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Burn_IT


Joined: 12 Aug 2006
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Location: Tamworth UK

PostPosted: Tue 27 Mar 2018, 12:43    Post subject:  

They made many individual devices of the same design with the same mac address. Every single communication device was supposed to have a different mac address hard coded into it's firmware.
Yes it did matter because every single device was supposed to be identifiable.
As a result there has had to be a new unique scheme devised, IPV6 which gives every device an address.

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inherit2

Joined: 23 Jun 2014
Posts: 8

PostPosted: Tue 27 Mar 2018, 15:32    Post subject:  

Burn_IT wrote:
They made many individual devices of the same design with the same mac address.


I didn't know that. WIKI says about MAC " is a unique identifier assigned to network interface". So if what you say is true, then it is possible that two your computers/NIC have the same MAC addresses. Then you would tear your hair out wondering why your LAN ain't working ...

thanks
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Burn_IT


Joined: 12 Aug 2006
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Location: Tamworth UK

PostPosted: Tue 27 Mar 2018, 16:18    Post subject:  

I've had two PCI cards with the same MAC address. It wasn't a problem as long as they weren't attached to the same router. - though not an ideal situation.
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