TCP/IP Packet and 5 Layers

Question 1

TCP/IP PACKET LAYOUT

Answer 1

-The source address
-The destination address
-Information which enables the data to be
reassembled into its original form
-Other tracking information
-The data itself
-A checksum that checks that the data has not been corrupted

Question 2

What does the Application layer do?

Answer 2

Allows software to use the network (e.g. email (SMTP) or browsers (HTTP))

Question 3

What does the Data-Link layer do?

Answer 3

Checks that data has been received correctly. (Ethernet)

Question 4

What does the Transport layer do?

Answer 4

Makes sure the data is sent and received in the correct order (TCP)

Question 5

What does the physical layer do?

Answer 5

Consists of hardware such as routers and switches. (requires NIC)

Question 6

What does the network layer do?

Answer 6

Responsible for addressing and routing data (IP)