Explain the benefits of virtualization in faster server development.
What will be an ideal response?
For medium and large organizations that deploy many computers, server virtualization can save significant deployment time. Features such as live migration and the ability to use operating system images enable an organization to quickly set up a virtual machine. For some organizations, this means that a virtual machine with an operating system can be set up in much less than an hour and in some cases as fast as 15 minutes. Consider an organization that must set up 22 new servers. Without using virtual servers, this organization spends on average one to three days preparing the operating system and applications to set up one new server. This does not count the time waiting for new hardware to arrive for each new individualized server. By implementing a virtual server with virtual machines, the same company reduces the deployment time per server to under an hour. That represents a significant savings in computer personnel time.
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In the 5-layer reference model used with the TCP/IP Internet protocols, what is the purpose of each of the five layers?
What will be an ideal response?
_______ are specifically designed to store groups of values.
a) Collections b) Properties c) Accessors d) None of the above.
A(n) ________ command is a button that acts somewhat like light switch that can be turned on and off.
Fill in the blank(s) with the appropriate word(s).
A local area network is:
a. a large central network that connects other networks in a distance spanning exactly 5 miles. b. a group of personal computers or terminals located in the same general area and connected by a common cable (communication circuit) so they can exchange informationsuch as a set of rooms, a single building, or a set of well-connected buildings. c. a network spanning a geographical area that usually encompasses a city or county area (3 to 30 miles). d. a network spanning a large geographical area (up to 1000s of miles). e. a network spanning exactly 10 miles with common carrier circuits.