Case-Based Critical Thinking QuestionsCase 7-2Kyra is quizzing her friend Leon about the various options available in CSS to direct parts of the Web page to different output devices, in preparation for his test tomorrow.How many possible values does Leon tell Kyra the media attribute has?

Pages in a database have P bytes. A table T has R rows and n integer attributes, A1, A2, .An. Each attribute is r bytes long. Assume that r is much greater than the size of a pointer, so the pointer size can be ignored when computing the size of an entry in an index. Assume that the domain of A1 is the integers between 1 and 100 and that the values of this attribute are randomly distributed in

the domain. Consider the following statement:

SELECT A2
FROM	T
WHERE A1 <= 50 AND A1 > 25

Evaluate the cost, in terms of the number of I/O operations, of executing the statement under the following conditions. In order to get credit you must explain your work clearly. (a) The table is stored as a heap (no indexes). (b) There is a non-integrated (separate index file) clustered index with search key A1. (c) There is an unclustered index with search key (A2, A1).

Of which of the following ICMP replies are there two versions, which are: the standard version that simply states the packet had the Don't Fragment bit set when it reached a router that needed to fragment it, and the PMTU version that includes information about the restricting link?

A. Code 2: Protocol Unreachable B. Code 3: Port Unreachable C. Code 4: Fragmentation Needed and Don't Fragment Was Set D. Code 5: Source Route Failed