d$.$ Click the Outbound PDU Details tab and scroll down to the last section.

Questions:

What transport layer protocol does email traffic use?

Are these communications considered to be reliable?

e$.$ Record the SRC PORT, DEST PORT, SEQUENCE NUM, and ACK NUM values. What is the flag field value?

f$.$ Close the PDU and click Capture$/$Forward until a PDU returns to the E$-$Mail Client with a checkmark.

g$.$ Click the TCP PDU envelope and select Inbound PDU Details.

Question:

How are the port and sequence numbers different than before?

h$.$ Click the Outbound PDU Details tab.

Question:

How are the port and sequence numbers different from the previous two results?

i$.$ There is a second PDU of a different color that E$-$Mail Client has prepared to send to MultiServer. This is the beginning of the email communication. Click this second PDU envelope and select Outbound PDU Details.

Questions:

How are the port and sequence numbers different from the previous two PDUs?

What email protocol is associated with TCP port $25?$ What protocol is associated with TCP port $110?$