计算机和数字化基础.pptVIP

* * * * * * * * * * Figure 1-13 * Figure 1-13 * * * * * * Figure 1-16 The purpose of a server is to serve computers on a network (such as the Internet or a home network) by supplying them with data A mainframe computer (or simply a mainframe) is a large and expensive computer capable of simultaneously processing data for hundreds or thousands of users A computer falls into the supercomputer category if it is, at the time of construction, one of the fastest computers in the world (A compute-intensive problem is one that requires massive amounts of data to be processed using complex mathematical calculations) * * * * * Figure 1-22 * * * Digital data is text, numbers, graphics, Sound, and video hat has been converted into discrete digits such as 0s and 1s. * Digital data is text, numbers, graphics, Sound, and video hat has been converted into discrete digits such as 0s and 1s. * * * * * * * * * * * * * * * Processor Logic Chapter 1: Computers and Digital Basics * Chapter 1: Computers and Digital Basics * Section E: Password Security Learning Outcomes: Authentication Protocols Password Hacks Secure Passwords Question 012500 Security experts stress that the use of “strong” passwords can prevent identity theft and help to keep your computer files secure. Which of the following passwords is likely to be the most secure? C A. 12345 because it is all numbers. B. Hippocampus, because it is a long and unusual word. C. Il2baomw, because it combines numbers with a nonsense word. D. Football88, because it combines a word and numbers. Chapter 1: Computers and Digital Basics * * Chapter 1: Computers and Digital Basics * Authentication Protocols Chapter 1: Computers and Digital Basics * Authentication Protocols What? Definition: Security experts use the term authentication protocol to refer to any method that confirms a person’s identity using something the person knows, something the person possesses, or something the person is E.g. : password, pin, ATM card, credit card, b