Basic networking concepts

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  • -A network can be defined as a group of computers and other devices connected in some ways so as to be able to exchange data. -Each of the devices on the network can be thought of as a node; each node has a unique address. -Addresses are numeric quantities that are easy for computers to work with, but not for humans to remember. Example: 204.160.241.98 -Some networks also provide names that humans can more easily remember than numbers. Example: www.javasoft.com, corresponding to the above numeric address. Internet address Consists of 4 bytes separated by periods Example: 136.102.233.

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  • Objectives: Summarize the operation of Ethernet as defined for 100/1000 Mbps LANs in the IEEE 802.3 standard. Explain the functions that enable a switch to forward Ethernet frames in a LAN. Configure a switch for operation in a network designed to support voice, video, and data transmissions. Configure basic security on a switch that will operate in a network designed to support voice, video, and data transmissions.

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  • Before considering how to configure Cisco routers and switches, you must be introduced to basic networking concepts you’ll need to understand in order to grasp the advanced concepts discussed in later chapters. The OSI Reference Model is the best place to start, since it will help you understand how information is transferred between networking devices. Of the seven layers in the OSI Reference Model, be especially sure to understand how the bottom three layers function, since most networking devices function at these layers.

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  • According to Eric Vanderburg of certmag.com, the CCNA is “Cisco's introductory certification and the one in greatest demand. Cisco products often are the first thought when choosing network infrastructure equipment, and they are immensely prevalent, creating a vast need for professionals who are capable of managing them.” On June 25, 2007, Cisco announced major updates to their CCNA curricula, including the new version of the CCNA Composite Exam (640- 802 CCNA).

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  • Cisco Certified Network Associate (CCNA®) validates the ability to install, configure, operate, and troubleshoot medium-size route and switched networks, including implementation and verification of connections to remote sites in a WAN. CCNA curriculum includes basic mitigation of security threats, introduction to wireless networking concepts and terminology, and performance-based skills.

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  • Link-State Routing Protocols. Objectives: Describe the basic features & concepts of link-state p routing protocols. Distance vector routing protocols are like road signs because routers must make preferred path decisions based on a distance or metric to a network. Link-state routing protocols are more like a road map because they create a topological map of the network and each router uses this map to determine the shortest path to each network. The ultimate objective is that every router receives all of the link-state information about all other routers in the routing area.

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  • This chapter aims to introduce the basic concepts of satellite networking including appli- cations and services, circuit and packet switching, broadband networks, network protocols and reference models, characteristics of satellite networks, internetworking between satellite and terrestrial networks and convergence of network technologies and protocols. When you have completed this chapter, you should be able to:

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  • This book provides a thorough examination and analysis of cutting-edge research and security solutions in wireless and mobile networks. It begins with coverage of the basic security concepts and fundamentals which underpin and provide the knowledge necessary for understanding and evaluating security issues, challenges, and solutions. This material will be of invaluable use to all those working in the network security field, and especially to the many people entering the field.

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  • Cisco Systems, Inc., the worldwide leader in networking for the Internet, has prepared this guide to make networking easier for your campus or district. If you’re new to networking, it’s an ideal introduction, starting with the most basic of components and helping you pinpoint the best technologies and design for your network. If you already know your networking ABCs, look to this guide for straightforward explanations of key terms and concepts to keep building your knowledge base.

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  • In this chapter: Explain the basic concepts of a switched environment, configure initial settings on a Cisco switch, configure switch ports to meet network requirements, configure the management switch virtual interface, describe basic security attacks in a switched environment, describe security best practices in a switched environment, configure the port security feature to restrict network access.

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  • This chapter summarize the operation of Ethernet as defined for 100/1000 Mbps LANs in the IEEE 802.3 standard. Explain the functions that enable a switch to forward Ethernet frames in a LAN. Configure a switch for operation in a network designed to support voice, video, and data transmissions. Configure basic security on a switch that will operate in a network designed to support voice, video, and data transmissions.

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  • The Objectives of this chapter: Describe the basic features & concepts of link-state routing protocols. List the benefits and requirements of link-state routing protocols. Link state routing protocols.

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  • In these exercises, you will explore some basic multicast concepts via simple IP multicast applications that have been in usage for several years and are known as Mbone tools. The Mbone was the original implementation of IP multicast on the Internet. In these exercises all the hosts (your PCs) are connected to the same LAN—no multicast routing is needed at this stage.

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  • Summarize the operation of Ethernet as defined for 100/1000 Mbps LANs in the IEEE 802.3 standard. Explain the functions that enable a switch to forward Ethernet frames in a LAN. Configure a switch for operation in a network designed to support voice, video, and data transmissions. Configure basic security on a switch that will operate in a network designed to support voice, video, and data transmissions.

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  • The objectives of this course are to introduce you to the fundamentals and benefits of using tcpdump as a tool to analyze your network traffic. We’ll start with introducing concepts and output of tcpdump. One of the most important aspects of using tcpdump is being able to write tcpdump filters to look for specific traffic. Filter writing is fairly basic unless you want to examine fields in an IP datagram that don’t fall on byte boundaries. So, that is why an entire section is devoted to the art of writing filters....

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  • This module provides students with the basic theory, concepts, and terminology of object-oriented programming. It also provides a minimal amount of C# syntax, specifically for implementing encapsulation. After completing this module, students will be able to: Define the terms object and class in the context of object-oriented programming. Define the three core aspects of an object: identity, state, and behavior. Describe abstraction and how it helps you to create reusable classes that are easy to maintain.

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  • Wireless Sensor Networks (WSNs) can be defined as a self-configured and infrastructure-less wireless networks to monitor physical or environmental conditions, such as temperature, sound, vibration, pressure, motion or pollutants and to cooperatively pass their data through the network to a main location or sink where the data can be observed and analysed. A sink or base station acts likean interface between users and the network. One can retrieve required information from the network by injecting queries and gathering results from the sink.

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  • This book guides readers through the basics of rapidly emerging networks to more advanced concepts and future expectations of Telecommunications Networks. It identifies and examines the most pressing research issues in Telecommunications and it contains chapters written by leading researchers, academics and industry professionals. Telecommunications Networks - Current Status and Future Trends covers surveys of recent publications that investigate key areas of interest such as: IMS, eTOM, 3G/4G, optimization problems, modeling, simulation, quality of service, etc.

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  • Information security does not guarantee the safety of your organization or your information or your computer systems. Information security cannot, in and of itself, provide protection for your information. That being said, information security is also not a black art. There is no sorcery to implementing proper information security and the concepts that are included in information security are not rocket science. In many ways, information security is a mindset. It is a mindset of examining the threats and vulnerabilities of your organization and managing them appropriately. 

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  • Transmission Basics and  Networking Media Explain basic data transmission concepts, including full duplexing, attenuation, and noise Describe the physical characteristics of coaxial cable, STP, UTP, and fiber-optic media Compare the benefits and limitations of different networking media Identify the best practices for cabling buildings and work areas Specify the characteristics of popular wireless transmission methods, including 802.11, infrared, and Bluetooth

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