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This newly revised printing includes extensive appendixes that incorporate the new topics from Version 2.1 of the online curriculum. New appendixes on computer basics and network troubleshooting and expanded sections on physics, electricity, and binary and hexadecimal conversion lay the groundwork for networking comprehension with Version 2.1 of the online curriculum. The mapping guide tracks to multiple versions of the online curriculum, making topics and assignments easy to find even if you are using an earlier version of the curriculum. Includes helpful features to increase your knowledge:
Cisco Press is a collaboration between Cisco Systems, Inc., and Pearson Education that is charged with developing high-quality, cutting-edge educational and reference products for the networking industry. The products in the Cisco Networking Academy Program series are designed to prepare students for careers in the exciting networking field. George Ward (team leader and senior engineer), Dennis Frezzo, Jai Gosine, Alex Belous, and David Alexander wrote the online curriculum.
In this chapter, you will learn about important networking terms and concepts. In addition, you will learn about two different types of networks: Local-area networks (LANs), which make it possible for businesses using computer technology to efficiently share such things as files and printers m Wide-area networks (WANs), which make it possible for businesses to communicate with each other even though they are geographically distant from each other Finally, you will learn about the Open System Interconnection (OSI) reference model and the communication process between the lower layers of the OSI reference model.
Networking is the interconnection of workstations, peripherals (such as printers, hard drives, scanners, and CD-ROMs), and other devices. In networking, it is possible for different types of computers to communicate. It is not important what type of computer is used on a network. It may be a Macintosh, a PC, or a mainframe. In networking, what is important is that all the devices speak the same language, or protocol, which is a formal description of a set of rules and conventions that govern how devices on a network exchange information. For example, if a group of people are assigned to work as a team to complete a project, it does not matter if those people are French, German, Italian, American, Chinese, or Mexican. What is important is that they be able to communicate through a common language. In today's world, the team most likely would speak English. In computing, a protocol would function like English in this example because, like English, the protocol is a common language that can be understood by all devices on a network.
Why and How Did Networking Start?
Early computers were standalone devices. In other words, each computer operated on its own, independently from other computers. It soon became apparent that this was not an efficient or cost-effective way for businesses to operate. A solution was needed that would successfully address three problems:
Businesses needed a way to move information efficiently and quickly from one LAN to another. The solution was the creation of WANs. WAlVs interconnect LANs to provide access to computers or file servers in other locations. Because WANs connect networks that serve users across a large geographic area, they make it possible for businesses to communicate with each other even though they are geographically distant.
By networking or connecting computers, printers, and other devices on a WAN so they can communicate with each other, as shown in Figure 1-1, it is possible to share information and resources, as well as to access the Internet.
The Need for Standards
During the past two decades there has been a tremendous expansion of WANs. As organizations realized how much money they could save and how much productivity they could gain by using network technology, they began adding networks and expanding existing networks almost as rapidly as new network technologies and products were introduced. Consequently, many of the networks were built using different hardware and software implementations...
The Cisco Networking Academy Program provides in-depth and meaningful networking content, which is being used by regional and local academies to teach students around the world by utilizing the curriculum to integrate networking instruction into the classroom. The focus of the Cisco Networking Academy Program is the integration of a Web-based network curriculum into the learning environment. This element is addressed through intensive staff development for teachers and innovative classroom materials and approaches to instruction, which are provided by Cisco. The participating educators are provided with resources, the means of remote access to online support, and the knowledge base for the effective classroom integration of the Cisco Networking Academy Program curriculum into the classroom learning environment. As a result, the Cisco Networking Academy Program provides the means for dynamic exchange of information by providinga suite of services that redefine the way instructional resources are disseminated, resulting in a many-to-many interactive and collaborative network of teachers and students functioning to meet diverse educational needs.
What makes the Cisco Networking Academy Program curriculum exciting to educators and students is the fact that the courseware is interactive. Because of the growing use of interactive technologies, the curriculum is an exciting new way to convey instruction with new interactive technologies that allow instructors and trainers to mix a number of media, including audio, video, text, numerical data, and graphics. Consequently, students can select different media from the computer screen and custom design their instructional content to meet their instructional needs, and educators have the option of either designing their own environment for assessment or selecting from the applicable assessments.
Semester 1 v2.1 is structured entirely around the OSI model, with a structured cabling project midway through the semester. With these changes in the mind, the book includes a "Computer Basics" appendix, which provides foundational material essential to the course. In addition, the "Electronics and Signals" and the "Signaling and Data Transmission" appendixes have been introduced to make the media and electronics section of the course more meaningful. The "Binary and Hexadecimal Conversion" appendix reflects the binary and hexadecimal math content in the curriculum, which is taught separately from IP addressing to allow students time to master the math beforeapplying it. The book also includes a "Network Troubleshooting" appendix to support the curriculum.
Finally, this book aims not only to prepare you for your CCNA test and certification, but also to prepare you for the CompTIA Net + networking certification exam. The OSI model is absolutely essential for all networking students preparing for the CCNA exam. The sections on collisions and segmentation are also very important for the CCNA exam, along with Ethernet, which is important to understand the dominant LAN technology. The IP addressing chapters are perhaps the most conceptually difficult, yet are very important chapters, especially for the CCNA exam. Lastly, the skills in the structured cabling and electricity chapters are crucial if you are seeking network-cabling related employment. This mapping guide will help you implement the Companion Guide and Engineering Journal/Workbook with version 2.1 of the curriculum.