computer

| January 29, 2016

Describe what happens at each layer of the OSI on our computer when the e-mail message is sent to Aunt Martha.

It’s dear old Aunt Martha’s birthday and we want to send her an email message. Use the information given below to answer the following questions about what happens behind the scenes to our email message.

Our IP address: 107.67.89.54 (IPv4)
Our assigned port number: 1146
Aunt Martha’s IP address: 203.234.98.23 (IPv4)
Aunt Martha’s port number: 25
Size of our email message in bytes: 5732
Size of data portion of our TCP packet: 512
Size of window: 5 packets

1) Describe what happens at each layer of the OSI on our computer when the e-mail message is sent to Aunt Martha.
2) Describe what happens on each layer of the OSI on Aunt Martha’’s when the e-mail message reaches Aunt Martha.
3) What protocols might be used on each level of the OSI to send our email message? What is each of those protocols responsible for?
4) How many packets will it take send our e-mail message? Be sure to include the packets needed to establish the connection that will be used to send our email, to break down the connection, and those sent by Aunt Martha’s computer back to our computer that acknowledge our packets.
5) It looks like packet #4 never made it to Aunt Martha’s computer. What most likely happened to the packet? How does our computer know that the packet never arrived? How many packets will we know end up sending to aunt Martha?

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Category: Essay

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