tailieunhanh - CompTIA A+ Complete Study Guide p6

Chống phân mảnh đĩa liên quan đến việc phân tích các đĩa và sau đó củng cố các tập tin và thư mục bị phân mảnh, do đó họ chiếm một không gian tiếp giáp, do đó tăng hiệu suất trong quá trình phục hồi tập tin. DEFRAG tiện ích dòng lệnh cho phép bạn chạy chống phân mảnh từ một lệnh | 426 Chapter 8 Networking Fundamentals Sharing documents was cumbersome. People grew tired of having to save to a diskette and then take that diskette to the recipient. This procedure was called sneakernet. There was no e-mail. Instead there was interoffice mail which was not reliable and frequently was not delivered in a timely manner. To address these problems networks were born. A network links two or more computers together to communicate and share resources. Their success was a revelation to the computer industry as well as businesses. Now departments could be linked internally to offer better performance and increase efficiency. You have heard the term networking in the business context where people come together and exchange names for future contact and to give them access to more resources. The same is true with a computer network. A computer network allows computers to link to each other s resources. For example in a network every computer does not need a printer connected locally in order to print. Instead one computer has a printer connected to it and allows the other computers to access this resource. Because they allow users to share resources networks offer an increase in performance as well as a decrease in the outlay for new hardware and software. In the following sections we will discuss the fundamentals of networking as well as the specifics of networking media and components. Understanding Networking Fundamentals Before you can understand networking and the procedures involved in installing a network you must first understand the fundamentals. The fundamentals include the following LANs vs. WANs Primary network components Network operating systems NOSs Network topologies Network communications Network communication protocols Protocol addressing Network architectures LANs vs. WANs Local area networks LANs were introduced to connect computers in a single office. Wide area networks WANs expanded the LANs to include networks outside the local .

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