a) In Figure 2-14, what will be the value in the destination port number field if a packet arrives for the e-mail application? b) When the HTTP program on a webserver sends an HTTP response message to...

a) In Figure 2-14, what will be the value in the destination port number field if a packet arrives for the e-mail application?

b) When the HTTP program on a webserver sends an HTTP response message to a client PC, in what field of what message will it place the value 80?