What are the three different types of port number ranges as defined by IANA?
What will be an ideal response?
ANSWER: Port numbers range from 0 to 65535 and are divided by IANA into three types:
* well-known ports-Range from 0 to 1023 and are assigned by IANA to widely used and well-known utilities and applications, such as Telnet, FTP, and HTTP.
* registered ports-Range from 1024 to 49151 and can be used temporarily by processes for nonstandard assignments for increased security. Default assignments of these registered ports must be registered with IANA.
* dynamic and private ports-Range from 49152 to 65535 and are open for use without restriction.
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Step through each line of the JavaScript program below. (This is the program from Figure 17.1.) Write down the value of each variable as you walk through it.
Use an order of a 16 oz. latte with 2 shot. var price; var taxRate = 0.088; if (drink == "espresso") price = 1.40; if (drink == "latte" || drink == "cappuccino") { if (ounce == 8) price = 1.95; if (ounce == 12) price = 2.35; if (ounce == 16) price = 2.75; } if (drink == "Americano") price = 1.20 + .30 * (ounce/8); price = price + (shots - 1) * .50; price = price + price * taxRate
Whenever you use the Overlay blending mode, it increases ____________________ in the base art.
Fill in the blank(s) with the appropriate word(s).
Which of the following represents a method of connection to the Internet?
A) radio B) DSL telephone service C) dial-up telephone service D) all of the above
If a framed Web page is divided into two columns, how many separate XHTML documents are needed to display the page?
A) 2 B) 3 C) 4 D) 1