Describe what happens at every step of our network model, when a node on one network establishes a TCP connection with a node on another network. Assume two networks are both connected to same router.

Describe what happens at every step of our network model, when a node on one network establishes a TCP connection with a node on another network. You can assume that the two networks are both connected to the same router.

Please include a detailed explanation of the following:

Physical layer
Data link layer
Network layer
Transport layer
MAC address
IP address
TCP port
Checksum check
Routing table
TTL
A RakeshHelp Desk ExecutiveAsked:
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Sajid Shaik MSr. System AdminCommented:
read abount OSI layers ..for brief ...

the initial stage is the 3 way handshake... after connection established the remaining layers performs their roles...as per requirement..

read this ...article

https://www.geeksforgeeks.org/computer-network-tcp-3-way-handshake-process/

here about OSI layers

https://www.geeksforgeeks.org/layers-osi-model/

all the best
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A RakeshHelp Desk ExecutiveAuthor Commented:
Thank you for your most valuable feedback ,

Can you elaborate step by step taking an Example
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Sajid Shaik MSr. System AdminCommented:
Step 1 (SYN) : In the first step, client wants to establish a connection with server, so it sends a segment with SYN(Synchronize Sequence Number) which informs server that client is likely to start communication and with what sequence number it starts segments with
Step 2 (SYN + ACK): Server responds to the client request with SYN-ACK signal bits set. Acknowledgement(ACK) signifies the response of segment it received and SYN signifies with what sequence number it is likely to start the segments with
Step 3 (ACK) : In the final part client acknowledges the response of server and they both establish a reliable connection with which they will start eh actual data transfer

while the 3 way handshake the first request will release source system over ethernet card -pass through the cable reach to Switch-
on switch if its first time comminication... then it'll brodcast that request to all machines and otehr communication devices connected to that switch ...

the concerned server or dstination machine (which u want to make communication) will responce to that request and sends Sync+Acknowledgement  ... remaining all other machines drop the request...

when the acknowledgement recieved to the source ... source will accepts and the connection establishes..

when the first sync request pass through switch ... the switch will record Mac Address and Ip of the Source machine int it's cam table...(content addressable memory table)

when the reply comes from the destination machine when it's reach to first hop as switch it'll record the destination machines mac address and IP address on swithc cam table...

this way when the next communication starts ... the request reach to switch ... now it'll know the destination of the machine ... so this time it'll not brodcast the request ... it'll direct send the request to the destination machine ...

this way communication happens...

when the Router comes in the scenario...

the router will work as bridge between the 2 different networks ... it'll allow/deney the traffic as per it's roting rules..

hope this will helsp you

all the best
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A RakeshHelp Desk ExecutiveAuthor Commented:
Wonderful Answer. I appreciate all your work,i would be most thankful if you can explain the answer by including a detailed explanation of the following :

Physical layer
Data link layer
Network layer
Transport layer
MAC address
IP address
TCP port
Checksum check
Routing table
TTL
0
Sajid Shaik MSr. System AdminCommented:
Dear Rakesh,

my advice to you is either read the complete article i adviced you or you can find the lot of video materials online as well..  or else short and sweet... join any of the best institute..

all the best
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A RakeshHelp Desk ExecutiveAuthor Commented:
Thank you sir for providing the valuable support.
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nociSoftware EngineerCommented:
Andrew S Tanenbaum once wrote a good book on he subject, very useful and although it might be from 1980'-ish then network technologies you ask for are from the 1970's..... and are still relevant today.
Title "Computer Networks" , Academic Press IIRC.
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