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<td bgcolor="#336666"><b><font face="Arial" size="2" color="#FFFFFF">6.2</b></font></td>
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<td bgcolor="#336666" width="100%"><strong><font size="2" color="#FFFFFF">
<span style="font-family: Arial">Network Management</span></font></strong></td>
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<td bgcolor="#669999" height="25"><b>
<font face="Arial" size="2" color="#FFFFFF">6.2.1</font></b></td>
<td bgcolor="#669999"><img border="0" src="../../images/transdot.gif" width="10" height="1"></td>
<td bgcolor="#669999" height="25" width="100%"><strong>
<font size="2" color="#FFFFFF"><span style="font-family: Arial">Introduction
to network management </span></font></strong></td>
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<font face="Arial" size="2">As a network evolves and grows, it becomes
a more critical and indispensable resource to the organization.
<img border="0" src="../../images/1.gif" align="absmiddle" width="12" height="12"> As more
network resources are available to users, the network becomes more
complex, and maintaining the network becomes more complicated. Loss of
network resources and poor performance are results of increased
complexity and are not acceptable to the users.
<img border="0" src="../../images/2.gif" align="absmiddle" width="12" height="12"> The
network administrator must actively manage the network, diagnose
problems, prevent situations from occurring, and provide the best
performance of the network for the users. At some point, networks
become too large to manage without automated network management tools.</font><p>
<font face="Arial" size="2">Network Management includes:</font></p>
<ul>
<li>
<font face="Arial" size="2">Monitoring network availability</font></li>
<li>
<font face="Arial" size="2">Improved automation </font></li>
<li>
<font face="Arial" size="2">Monitoring response time</font></li>
<li>
<font face="Arial" size="2">Security features</font></li>
<li>
<font face="Arial" size="2">Traffic rerouting</font></li>
<li>
<font face="Arial" size="2">Restoration capability</font></li>
<li>
<font face="Arial" size="2">User registration</font></li>
</ul>
<p>
<font face="Arial" size="2">The driving forces behind network
management are shown in Figure
<img border="0" src="../../images/3.gif" align="absmiddle" width="12" height="12"> and
explained below:</font></p>
<ul>
<li>
<font face="Arial" size="2"><b>Controlling corporate assets</b> � If
network resources are not effectively controlled, they will not
provide the results that management requires.</font></li>
<li>
<font face="Arial" size="2"><b>Controlling complexity</b> � With
massive growth in the number of network components, users, interfaces,
protocols, and vendors, loss of control of the network and its
resources threatens management.</font></li>
<li>
<font face="Arial" size="2"><b>Improved service</b> � Users expect
the same or improved service as the network grows and the resources
become more distributed.</font></li>
<li>
<font face="Arial" size="2"><b>Balancing various needs</b> � Users
must be provided with various applications at a given level of
support, with specific requirements in the areas of performance,
availability, and security.</font></li>
<li>
<font face="Arial" size="2"><b>Reducing downtime</b> � Ensure high
availability of resources by proper redundant design.</font></li>
<li>
<font face="Arial" size="2"><b>Controlling costs</b> � Monitor and
control resource utilization so that user needs can be satisfied at
a reasonable cost.</li>
</ul>
<p>Some basic network management terms are introduced in Figure
<img border="0" src="../../images/4.gif" align="absmiddle" width="12" height="12">.</font></p>
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<p><font color="#808080">
<a href="javascript:void(0)" onClick="window.open('../../activities/ch06/activity_6_2_1.html','Interactivity','width=740,height=390,toolbar=0,resizable=yes,scrollbars=0,screenX=26,screenY=38,left=26,top=38');">
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</font><font FACE="Arial" SIZE="2" COLOR="#808080">
<p>Drag and Drop: Network Management Terminology</p>
<p>When the student has completed this activity, the student
will be able to identify the terminology used in Network
Management.</p>
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