dineshb_2001
asked on
Layers
Hi all,
Please can anyone give me the nice description of what the lower 4 layers (Physical,Data link, Network , Transport) actually do when one system wants to send the packet to another system.
Please don`t give me any reference. Explain in your own words.
thanks in advance,
Dinesh.
Please can anyone give me the nice description of what the lower 4 layers (Physical,Data link, Network , Transport) actually do when one system wants to send the packet to another system.
Please don`t give me any reference. Explain in your own words.
thanks in advance,
Dinesh.
donkey's dont have layers.. - sorry just had to..
Ok.. well when a packet comes from the upper layers (application, presentation, session) it is still in data form... but as it goes through each layer, it adds a header onto the data that comes in.... eg, through the transport layer, it adds the TCP header to the data, (now called a frame), at the network layer, it adds for instance an IP header with IP address, (and now called a packet), at datalink layer, it adds a header and a trailer... has data like the MAC address... (now called a segment) and finally goes down to the physical layer, where it is translated into bits to go onto the wire...
On the other end, as it goes up the layers, it strips the header, and reads the information...
Whala
Ok.. well when a packet comes from the upper layers (application, presentation, session) it is still in data form... but as it goes through each layer, it adds a header onto the data that comes in.... eg, through the transport layer, it adds the TCP header to the data, (now called a frame), at the network layer, it adds for instance an IP header with IP address, (and now called a packet), at datalink layer, it adds a header and a trailer... has data like the MAC address... (now called a segment) and finally goes down to the physical layer, where it is translated into bits to go onto the wire...
On the other end, as it goes up the layers, it strips the header, and reads the information...
Whala
ASKER CERTIFIED SOLUTION
membership
This solution is only available to members.
To access this solution, you must be a member of Experts Exchange.
ASKER
Hi rafael,
Anyway the points will be given to you but before giving I want to clear one thing.
As u said the "Actually we can say that there's always a virtual communication between the same layer on both ends. For example, the transport layer at one end, exchange information with the transport layer on the other end."
U mean it is the virtual communication and not the real communication. here virtual means the two corresponding end layers communicate with the help of their lower layers or they send packet to each other.
please clear to me this point.
Thanks in advance,
Dinesh.
Anyway the points will be given to you but before giving I want to clear one thing.
As u said the "Actually we can say that there's always a virtual communication between the same layer on both ends. For example, the transport layer at one end, exchange information with the transport layer on the other end."
U mean it is the virtual communication and not the real communication. here virtual means the two corresponding end layers communicate with the help of their lower layers or they send packet to each other.
please clear to me this point.
Thanks in advance,
Dinesh.
Yep. This is very true!!!
Very happy for being of some help to you. I'm not here for the points itself. It's just something I like to do.
Take care man
Cheers.
Very happy for being of some help to you. I'm not here for the points itself. It's just something I like to do.
Take care man
Cheers.
"with the help of their lower layers ..."
Don't know if we are allowed to answer this based on https://www.experts-exchange.com/help.jsp#hi56