tag:blogger.com,1999:blog-11404817312623941092011-11-27T15:39:12.362-08:00Network Guruhttp://www.blogger.com/profile/02762284585283496885noreply@blogger.comBlogger21100tag:blogger.com,1999:blog-1140481731262394109.post-90832098699149557352008-08-21T23:33:00.000-07:002009-03-13T23:21:31.121-07:00<script type="text/javascript"><br />var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www.");<br />document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E"));<br /></script><br /><script type="text/javascript"><br />try {<br />var pageTracker = _gat._getTracker("UA-5432598-1");<br />pageTracker._trackPageview();<br />} catch(err) {}</script><br /><a href="http://1.bp.blogspot.com/_gGxX2X0Yo1s/SK5jSAFofdI/AAAAAAAAAAQ/Ppvkb7-WC0E/s1600-h/network-structure.jpg"><img id="BLOGGER_PHOTO_ID_5237232577590885842" style="FLOAT: right; MARGIN: 0px 0px 10px 10px; CURSOR: hand" alt="" src="http://1.bp.blogspot.com/_gGxX2X0Yo1s/SK5jSAFofdI/AAAAAAAAAAQ/Ppvkb7-WC0E/s320/network-structure.jpg" border="0" /></a><br /><div align="justify">A <a href="http://www.webopedia.com/TERM/L/computer.html">computer</a> <a href="http://www.webopedia.com/TERM/L/network.html">network</a> that spans a relatively small area. Most LANs are confined to a single building or group of buildings. However, one LAN can be connected to other LANs over any distance via telephone lines and radio waves. A <a href="http://www.webopedia.com/TERM/L/system.html">system</a> of LANs connected in this way is called a <a href="http://www.webopedia.com/TERM/L/wide_area_network_WAN.html">wide-area network (WAN)</a>.<br /></div><br /><div align="justify">Most LANs connect <a href="http://www.webopedia.com/TERM/L/workstation.html">workstations</a> and <a href="http://www.webopedia.com/TERM/L/personal_computer.html">personal computers</a>. Each <a href="http://www.webopedia.com/TERM/L/node.html">node</a> (individual computer ) in a LAN has its own <a href="http://www.webopedia.com/TERM/L/CPU.html">CPU</a> with which it <a href="http://www.webopedia.com/TERM/L/execute.html">executes</a> <a href="http://www.webopedia.com/TERM/L/program.html">programs</a>, but it also is able to <a href="http://www.webopedia.com/TERM/L/access.html">access</a> <a href="http://www.webopedia.com/TERM/L/data.html">data</a> and <a href="http://www.webopedia.com/TERM/L/device.html">devices</a> anywhere on the LAN. This means that many <a href="http://www.webopedia.com/TERM/L/user.html">users</a> can share expensive devices, such as <a href="http://www.webopedia.com/TERM/L/laser_printer.html">laser printers</a>, as well as data. Users can also use the LAN to communicate with each other, by sending <a href="http://www.webopedia.com/TERM/L/e_mail.html">e-mail</a> or engaging in <a href="http://www.webopedia.com/TERM/L/chat.html">chat</a> sessions.<br /></div><br /><div align="justify">There are many different types of LANs <a href="http://www.webopedia.com/TERM/L/Ethernet.html">Ethernets</a> being the most common for <a href="http://www.webopedia.com/TERM/L/PC.html">PCs</a>. Most <a href="http://www.webopedia.com/TERM/L/Macintosh_computer.html">Apple Macintosh</a> networks are based on <a href="http://www.webopedia.com/TERM/L/Apple_Computer.html">Apple's</a> <a href="http://www.webopedia.com/TERM/L/AppleTalk.html">AppleTalk</a> network system, which is built into Macintosh computers.<br /></div><br /><div align="justify">The following characteristics differentiate one LAN from another:<br /><a href="http://www.webopedia.com/TERM/L/topology.html">topology</a> : The geometric arrangement of devices on the network. For example, devices can be arranged in a ring or in a straight line.<br /></div><br /><div align="justify"><a href="http://www.webopedia.com/TERM/L/protocol.html">protocols</a> : The rules and encoding specifications for sending data. The protocols also determine whether the network uses a <a href="http://www.webopedia.com/TERM/L/peer_to_peer_architecture.html">peer-to-peer</a> or <a href="http://www.webopedia.com/TERM/L/client_server_architecture.html">client/server architecture</a>.<br /></div><br /><div align="justify"><a href="http://www.webopedia.com/TERM/L/media.html">media</a> : Devices can be connected by <a href="http://www.webopedia.com/TERM/L/twisted_pair_cable.html">twisted-pair wire</a>, <a href="http://www.webopedia.com/TERM/L/coaxial_cable.html">coaxial cables</a>, or <a href="http://www.webopedia.com/TERM/L/fiber_optics.html">fiber optic</a> cables. Some networks do without connecting media altogether, communicating instead via radio waves.<br />LANs are capable of transmitting data at very fast rates, much faster than data can be transmitted over a telephone line; but the distances are limited, and there is also a limit on the number of computers that can be attached to a single LAN. </div><div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/1140481731262394109-9083209869914955735?l=nt-guru.blogspot.com' alt='' /></div>Network Guruhttp://www.blogger.com/profile/02762284585283496885noreply@blogger.com0tag:blogger.com,1999:blog-1140481731262394109.post-35442419640006419722008-08-05T03:15:00.001-07:002008-08-05T03:15:37.635-07:00<div class="blogger-post-footer"><img width='1' height='1' src='https://blogger.googleusercontent.com/tracker/1140481731262394109-3544241964000641972?l=nt-guru.blogspot.com' alt='' /></div>Network Guruhttp://www.blogger.com/profile/02762284585283496885noreply@blogger.com0