1. In Figure 2-16 (page 62 of the textbook):
   1. What will be the value in the destination port number field if a packet arrives for the e-mail application?
   2. When the HTTP program sends an HTTP response message to a client PC, in what field of what message will it place the value 80?

Transcribed Image Text:

Client 60.171.18.22 3 Source: 60.171.18.22:2707 Destination: 1.33.17.13:80 Source: 1.33.17.13:80 Destination: 60.171.18.22:2707 Source: 60.171.18.22:4400 Destination: 123.30.17.120:25 2 Client Uses Ephemeral Port Number 2700 with the Webserver 4400 with the SMTP Server SMTP Server 123.30.17.120 Port 25 FIGURE 2-16 Client Port Numbers and Sockets Webserver 1.33.17.13 Port 80 Server Programs use Well-Known Port Numbers (0 to 1023) Clients use Ephemeral Port Numbers (usually 1024 to 4999) Client 60.171.18.22 3 Source: 60.171.18.22:2707 Destination: 1.33.17.13:80 Source: 1.33.17.13:80 Destination: 60.171.18.22:2707 Source: 60.171.18.22:4400 Destination: 123.30.17.120:25 2 Client Uses Ephemeral Port Number 2700 with the Webserver 4400 with the SMTP Server SMTP Server 123.30.17.120 Port 25 FIGURE 2-16 Client Port Numbers and Sockets Webserver 1.33.17.13 Port 80 Server Programs use Well-Known Port Numbers (0 to 1023) Clients use Ephemeral Port Numbers (usually 1024 to 4999)