?____ is a packet-switched network that was designed for transmitting data over fixed lines.

Use Figure 6.10 to trace the path of the packets that are sent as a result of the ping command (e.g., ARP Request and Reply, ICMP Echo Request and Reply). Justify your answer with the saved data from Step 10.

What will be an ideal response?

If the dialog between user and program is as follows, give the rest of the dialog. (Here, means the user presses the return key.) Explain the results. Enter a line of input abc

Assume the following code fragment is executed while embedded in a complete, correct program. ``` char c1, c2, c3, c4; cout << "Enter a line of input \n"; cin.get(c1); cin.get(c2); cin.get(c3); cin.get(c4); cout << c1 << c2 << c3 << c4 << "END OF OUTPUT"; cout << endl; ```