Computer networks are useful because they

a. are free to use.

b. are protected from computer viruses.

c. allow people in different locations to share information and software.

d. do not require telephone lines or wires.

An increasing concern for privacy and widespread availability of encryption products has led to the use of encryption for individual files and even entire devices.

What is the purpose of system calls, and how do system calls relate to the OS and to the concept of dual-mode (kernel-mode and user-mode) operation?

Now, consider a circuit-switched network that has a 150 Mbps link capacity where each user requires a bandwidth of 10 Mbps when transmitting, but are only active 10 percent of the time. What is the maximum number of users that can be supported?

Which is an example of synchronous communication? e-mail voicemail O text message telephone conversation

Could you hook up a 2400 watt amp in a house even though amps are DC and In a house is AC

Is the hard disk outside the computer

An economy produces on three goods: bread, housing and computers. Quantities and prices per unit for 2003 and 2004 are as follows: 2003 2004 Quantity Price Quantity Price Bread: 500,000 3 600,000 4 Housing: 3,000 500 4,000 600 Computers: 1,000 25

What is programming?

Which view is most often used to reorder slides in a presentation that has already been created? O Outline view 0 Slide Sorter view O Reading view O Normal view

A brief history about computers