Many systems, including MS-Windows, support the use of ____________, which are short sequences of characters that appear at the end of filenames and are preceded by a period.

Packet filter firewalls are the most advanced type of firewalls

Indicate whether the statement is true or false.

Write a script that asks the user to enter two numbers, obtains the two numbers from the user and outputs HTML text that displays the sum, product, difference and quotient of the two numbers. Use the techniques shown in Fig. 13.6.

What will be an ideal response?