mac or ip communication ?

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Don't be so sure about that. This is the same guy who was attempting to understand route summarization without having an understanding of subnetting... and kept asking me to explain summarization even after I (and others) advised him that he HAS to understand subnetting before summarization will make any sense.

I've given up explaining anything to him because I've noticed that he doesn't often listen to advice. If he doesn't want to learn in a logical manner, why should I bang my head on my keyboard to try to explain things to him?

...and so that's why I pulled out the lawn chair, Coke Classic, and popcorn.

 

Hey!!! Where's my entertainment?!?

 

sorry for made you fed up with me a bit but
you still don't understand me

i know data encapsulation and another thing came into my mind
while sending packet from a host to another

on the sending host we do things all layers adding
the layer's header then data and it receives a name
for ex. ip header and data = packet
and for communicating with other host we match
the peer layers of each(sending host - receiving host)
then if you think packet , it handed down to data link layer(layer 2)

but i know that , we use ARP on LAN environment
by converting ip address to mac address for communicating
so when i use ARP (if data encaps.converts ip to mac)?

 

Data encapsulation does NOT convert IP To MAC as far as I'm aware, I'm sure some of the more experienced bods will be along shortly to help.

 

No problem kobem, we have given it our best shot but the language difficulty makes it too hard when talking about complicated stuff like this - it is hard enough with people that speak English well. No hard feelings mate, i admire your thirst for answers.

 

Kobem,

What is your native language?

you never know, there may be someone here who speaks it and can translate.

 

im Turk you know Turkish whose leader was Ataturk
once upon a time

 

i found a new idea bout that

host-host

for finding the location of a destination device we use ip address in a lan

after finding it we use mac addresses for communicate of two

and if we know the destination ip address but not mac of it
we use ARP in lan

but , where is the encaps. ?

 

I'm afraid I have no idea what you are asking here. Try rephrasing it?

Harry.

 

Er - on the packet? I'm not sure that I can follow what you are trying to say here, so I'm going to take a guess.

The IP address in the IP headers are *not* replaced by the MAC address - for one thing it wouldn't fit.

The IP packet is encapsulated by an ethernet header. But it needs to know what MAC address to put as a target in the header. This is where ARP is used to find that mapping.


Harry.

 

ok , i seem to understand but

source side learns destination ip from where ?

 

Have you heard of DNS?

 

Either it has been handed it directly, or it uses the usual hosts/DNS/WINS lookup.

Harry.