ccna practice questions 200-125

ccna practice questions 200-125.1.1.1 Network CharacteristicsThe following characteristics need to be considered when designing and maintaining a network. . Cost: The cost of purchasing, installing, and maintaining network components. . Security: protection of the network components, the data they contain, and the data transmitted between them. . Speed: the speed (data rate) at which data is transferred between network endpoints. . Topology: describes the physical wiring layout and how data is logically transferred between components. . Scalability: The ability of a network to expand, including the ability to accommodate new users, new applications, and new network components. . Reliability: The reliability of network components and connections between network components. A common metric used to indicate the likelihood of component failure is the Mean Time Between Failures (MTBF).A common metric to indicate the likelihood of component failure is Mean Time Between Failures (MTBF). Availability: A measure of the likelihood that the network will be available to users, where downtime refers to the network being unavailable due to failure or routine maintenance. Availability is usually measured as a percentage of uptime in a year, so availability is the number of minutes the network is available divided by the number of minutes in a year.Exam Essentials When designing and maintaining a network, keep the following factors in mind: cost, security, speed, topology, scalability, andWhen designing a network, you must deeply weigh cost, security, speed, topology, scalability, reliability, and availability. Networks vary, so the solution you design will vary from case to case.1.1.2 ComponentsApplications are important network components that allow users to perform a variety of tasks. Many applications are network applications that allow users to access and use resources that are not on the local computer. There are thousands of network applications, the more common of which include e-mail applications that send mail electronically, FTP (File TransferProtocol) applications that transfer files, and graphicalChapter 1 The Web 5Web applications that present information graphically.