One of the major goals of this book is to demystify the jargon of networks so that the reader gains a working familiarity with common networking terminology and acronyms.
In addition, this books explains not only how to choose and configure network hardware but also provides practical information about the types of network devices and software needed to make it all work. Tips and direction on how to manage an Ethernet network are also provided.
Wireless network refers to any type of computer network that is not connected by cables of any kind. It is a method by which homes, telecommunications networks and enterprise (business) installations avoid the costly process of introducing cables into a building, or as a connection between various equipment locations. Wireless telecommunications networks are generally implemented and administered using a transmission system called radio waves. This implementation takes place at the physical level (layer) of the OSI model network structure....
Căn bản về TCP/IP TCP/IP (Transmission Control Protocol/Internet Protocol) là một bộ protocols
(giao thức) được thiết kế để đạt hai mục tiêu chính: 1. Cho phép truyền thông qua các đuờng dây của mạng rộng (Wide Area Network - WAN). 2. Cho phép truyền thông giữa các môi trường đa dạng. Do đó hiểu được cái gốc của các protocols nầy giúp ta hiểu đuộc sự quan trọng của chúng trong các mạng ngày nay.
More complex networking services in Red Hat Linux require more advanced
administration methods. While graphical tools such as Network Configuration
(via the redhat-config-network command) are available to assist in configuring
all aspects of Linux networking, the best way to learn networking is by practicing with the key
command line utilities and associated configuration files.
There are many occasions when data need to be transmitted over a voice communication network.
Many people use a computer to connect to their Internet Service Provider via the telephone lines to
transmit and receive data, check their email, surf the Web, etc.
Telephone networks were originally built for human speech, not for computer data and is unsuitable for
digital communication in its raw form.
(Dùng cho sinh viên hệ đào tạo đại học từ xa)
Exercise 1. Read the following passage then answer the questions.
ANALOGUE AND DIGITAL NETWORKS
Digital technology in the telephone network is nothing new. Take all the relays in older
exchanges as an example. Relays are either "off" or "on", and there is no state in between these.
Suitable combinations of relays could build up and "remember" numbers - perhaps a far-fetched
example, but in was digital, so it will serve!...
Network management is the poor cousin of network design and implementation.
All too often it is treated as an inconvenience by equipment manufacturers, or
forgotten entirely. But the ability to manage network devices is fundamental to
their utility, and a successful and functional network can only be built from equipment
that can be easily managed and operated.
Management refers to the ability to confi gure, control, operate, and diagnose
equipment. Of course, no vendor ships devices that cannot be managed, but
typically each is operated and controlled in a different way.
Data Link Layer. Learning Objectives
Upon completion of this chapter, you will be able to:
Explain the role of Data Link layer protocols in data transmission.
Describe how the Data Link layer prepares data for transmission on network media.
Describe the different types of media access control methods.
Identify several common logical network topologies and describe how the logical topology determines the media access control method for that network.
Explain the purpose of encapsulating packets into frames to facilitate media access. ...
AD HOC NETWORKS: Technologies and Protocols is a concise in-depth treatment of various constituent components of ad hoc network protocols. It reviews issues related to medium access control, scalable routing, group communications, use of directional/smart antennas, network security, and power management among other topics. The authors examine various technologies that may aid ad hoc networking including the presence of an ability to tune transmission power levels or the deployment of sophisticated smart antennae. ...
Data communications and networking are changing the way we do business and the way
we live. Business decisions have to be made ever more quickly, and the decision makers
require immediate access to accurate information. Why wait a week for that report
from Germany to arrive by mail when it could appear almost instantaneously through
computer networks? Businesses today rely on computer networks and internetworks.
During the last decades, the usage of telecommunications systems has increased rapidly.
Because of a permanent necessity for new telecommunications services and additional
transmission capacities, there is also a need for the development of new telecommunications
networks and transmission technologies. From the economic point of view,
telecommunications promise big revenues, motivating large investments in this area.
An Introduction to Networking
List the advantages of networked computing relative to standalone computing
Distinguish between client/server and peer-to-peer networks
List elements common to all client/server networks
Describe several specific uses for a network
Identify some of the certifications available to networking professionals
Identify the kinds of nontechnical, or “soft,” skills that will help you succeed as a networking professional
Networking Standards and the OSI Model
Identify organizations that set standards for networking.
Describe the purpose of the OSI Model and each of its layers
Explain specific functions belonging to each OSI Model layer
Understand how two network nodes communicate through the OSI model
Discuss the structure and purpose of data packets and frames.
Describe the two types of addressing covered by the OSI Model.
Specifies the electrical, mechanical, procedural, and functional requirements for activating, maintaining, and deactivating the physical link between end systems. Examples of physical link characteristics include voltage levels, data rates, maximum transmission distances, and physical connectors.
In the world of computers, networking is the practice of linking two or more computing devices together for the purpose of sharing data. Networks are built with a mix of computer hardware and computer software.
A network can consist of two computers connected together on a desk or it can consist of many smaller network connected together to form a bigger network across a continent.
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
Identify the characteristics of TCP/IP, IPX/SPX, NetBIOS, and AppleTalk
Understand how network protocols correlate to layers of the OSI Model
Identify the core protocols of the TCP/IP suite and describe their functions
Identify the well-known ports for key TCP/IP services
Understand addressing schemes for TCP/IP, IPX/SPX, NetBEUI, and AppleTalk
Describe the purpose and implementation of DNS (Domain Name System) and WINS (Windows Internet Naming Service)
Install protocols on Windows XP clients...
Networking Hardware Identify the functions of LAN connectivity hardware
Install and configure a NIC (Network Interface Card)
Identify problems associated with connectivity hardware Describe the factors involved in choosing a NIC, hub, switch, or router
Discuss the functions of repeaters, hubs, bridges, switches, routers, and gateways, and the OSI Model layers at which they operate
Describe the use and types of routing protocols
Topologies and Access Methods
Describe the basic and hybrid LAN physical topologies, and their uses, advantages and disadvantages
Describe the backbone structures that form the foundation for most LANs
Compare the different types of switching used in data transmission
Understand the transmission methods underlying Ethernet, Token Ring, FDDI, and ATM networks
Describe the characteristics of different wireless network technologies, including Bluetooth and the three IEEE 802.11 standards
Networking with UNIX-Type of Operating Systems
Describe the origins and history of the UNIX operating system
Identify similarities and differences between popular implementations of UNIX
Describe the features and capabilities of servers running Solaris, Linux, and Mac OS X Server
Explain and execute essential UNIX commands
Install and configure Linux on an Intel-based PC
Manage users, groups, and file access permissions in Solaris, Linux, and Mac OS X Server
Explain how computers running other operating systems can connect to UNIX servers...