Explain the use of multicasts in both IPv4 and IPv6.
What will be an ideal response?
Multicasts have been around for a while; they existed in IPv4 and currently exist in IPv6. In IPv4, multicasts used Class D addresses (224.0.0.0/4), and a computer had to be part of a multicast group and configured with the appropriate multicast address to receive them. Only specific applications used multicasts. Multicasts work differently in IPv6, as IPv6 has replaced the concept of broadcasting with multicasting. Several IPv6-only multicast addresses have been added, such as those used by specific services (for example, router messages).
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The fundamental rule for testing functions requires that every function be tested in an already fully tested and debugged program. How can this be accomplished?
a) Impossible! The main function must have all the functions it calls attached to get it to compile and run properly. b) The main function is tested with stub functions replacing each` function. c) Write drivers for the stub functions to test them. d) Add each non-stub function in turn for testing. e) Write drivers for the function implementations one at a time to test them independently.
A site map is inaccessible to spiders and crawlers that search engines use to index Web sites.
Answer the following statement true (T) or false (F)
Which of the following is not one of the options to printing all slides?
A) 9 Slides Vertical B) 3 Slides C) 9 Slides Horizontal D) 12 Slides Vertical
Suppose a program to print paychecks secretly leaks a list of names of employees earning more than a certain amount each month. What controls could be instituted to limit the vulnerability of this leakage?
What will be an ideal response?