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diff --git a/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_2_3/content.html b/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_2_3/content.html new file mode 100644 index 0000000..2720a39 --- /dev/null +++ b/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_2_3/content.html @@ -0,0 +1,132 @@ +<html>
+
+<head>
+<meta http-equiv="Content-Language" content="en-us">
+<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
+<title>Content</title>
+<base target="_self">
+</head>
+
+<body background="../../images/bg.gif" topmargin="0" leftmargin="0" marginheight="0" marginwidth="0" onLoad="window.focus();" link="#808080" vlink="#808080" alink="#808080">
+
+<table border="0" cellpadding="0" cellspacing="0" width="100%">
+ <tr>
+ <td bgcolor="#336666" width="18" valign="top">
+ <img border="0" src="../../images/content_lines.gif" width="16" height="25">
+ <img border="0" src="../../images/transdot.gif" width="2" height="1"></td>
+ <td bgcolor="#336666"><b><font face="Arial" size="2" color="#FFFFFF">2.2</font></b></td>
+ <td bgcolor="#336666"><img border="0" src="../../images/transdot.gif" width="10" height="1"></td>
+ <td bgcolor="#336666" width="100%">
+ <strong><font face="Arial" size="2" color="#FFFFFF">WAN Technologies</font></strong></td>
+ <td width="9" bgcolor="#336666"> </td>
+ </tr>
+ <tr>
+ <td bgcolor="#669999" height="25" width="18"> </td>
+ <td bgcolor="#669999" height="25"><b><font face="Arial" size="2" color="#FFFFFF">
+ 2.2.3</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 face="Arial" size="2" color="#FFFFFF">Leased line</font></strong></td>
+ <td bgcolor="#669999" height="25" width="9"> </td>
+ </tr></table>
+
+<table border="0" cellpadding="0" cellspacing="0" width="95%" bordercolor="#111111">
+ <tr>
+ <td width="15"></td>
+ <td>
+
+ <font face="Arial" size="2">When permanent dedicated connections are
+ required, leased lines are used with capacities ranging up to 2.5 Gbps.</font><p>
+ <font face="Arial" size="2">A point-to-point link provides a
+ pre-established WAN communications path from the customer premises
+ through the provider network to a remote destination. Point-to-point
+ lines are usually leased from a carrier and are called leased lines.
+ Leased lines are available in different capacities.
+ <img border="0" src="../../images/1.gif" align="absmiddle" width="12" height="12"> These
+ dedicated circuits are generally priced based on bandwidth required
+ and distance between the two connected points. Point-to-point links
+ are generally more expensive than shared services such as Frame Relay.
+ The cost of leased-line solutions can become significant when they are
+ used to connect many sites. There are times when cost of the leased
+ line is outweighed by the benefits. The dedicated capacity gives no
+ latency or jitter between the endpoints. Constant availability is
+ essential for some applications such as electronic commerce.</font></p>
+ <p><font face="Arial" size="2">A router serial port is required for
+ each leased-line connection. A CSU/DSU and the actual circuit from the service provider are also
+ required.</font></p>
+ <p><font face="Arial" size="2">Leased lines are used extensively for
+ building WANs and give permanent dedicated capacity.
+ <img border="0" src="../../images/2.gif" align="absmiddle" width="12" height="12"> They have
+ been the traditional connection of choice but have a number of
+ disadvantages. WAN traffic is often variable and leased lines have a
+ fixed capacity. This results in the bandwidth of the line seldom being
+ exactly what is needed. In addition, each end point would need an
+ interface on the router which would increase equipment costs. Any changes to the leased line
+ generally require a site visit by the carrier to change capacity.</font></p>
+ <p><font face="Arial" size="2">Leased lines
+ provide direct point-to-point connections between enterprise LANs and connect individual branches to a
+ packet-switched network. Several connections can be multiplexed over
+ a leased line, resulting in shorter links and fewer required
+ interfaces. </font></p>
+ <TABLE bgcolor="#B0AFAF" width="95%" border="0" cellspacing="0" cellpadding="0">
+ <TR>
+ <TD valign="top">
+ <TABLE bgcolor="#669999" width="100%" cellspacing="0" cellpadding="0" border="0">
+ <TR>
+ <TD width="5">
+ <img border="0" src="../../images/lab_toplft.gif" width="116" height="23"></TD>
+ <TD><IMG alt="" height="1" width="3" src="../../images/s.gif"></TD><TD align="right" valign="top">
+ <IMG alt="" src="../../images/corner_ur_7.gif" width="7" height="7"></TD>
+ </TR>
+ </TABLE>
+
+ <TABLE bgcolor="#B0AFAF" width="100%" cellspacing="0" cellpadding="0" border="0">
+ <TR>
+ <TD>
+ <TABLE width="100%" cellpadding="2" cellspacing="0" border="0" bordercolor="#111111">
+ <TR>
+ <TD bgcolor="#ffffff" width="15"> </TD>
+ <TD bgcolor="#ffffff"><font FACE="Arial" SIZE="2" COLOR="#000000">
+ <p><font color="#808080">
+ <a href="javascript:void(0)" onClick="window.open('../../activities/ch02/activity_2_2_3.html','Interactivity','width=740,height=390,toolbar=0,resizable=yes,scrollbars=0,screenX=26,screenY=38,left=26,top=38');">
+ <img border="0" src="../../images/media_icon.gif" width="25" height="25"></a> <b>
+ <a onClick="window.open('../../activities/ch02/activity_2_2_3.html','Interactivity','width=740,height=390,toolbar=0,resizable=yes,scrollbars=0,screenX=26,screenY=38,left=26,top=38');" href="javascript:void(0)">Interactive Media Activity</a></b></font></p>
+ </font><font FACE="Arial" SIZE="2" COLOR="#808080">
+ <p>Checkbox: WAN Technologies Leased Lines</p>
+ <p>Upon completing this activity, the student
+ will be able to identify the characteristics associated with a
+ leased line connection.</p>
+ </font><font FACE="Arial" SIZE="2" COLOR="#000000">
+ <p><IMG alt="" height="2" width="1" src="../../images/s.gif"></p></TD>
+ </TR>
+ </TABLE>
+ </TD>
+ </TR>
+ </TABLE>
+ </TD>
+ </TR>
+ </TABLE>
+
+
+
+
+
+
+ </TD>
+ </TR>
+ </TABLE>
+ </TD>
+ </TR>
+ </TABLE>
+
+
+
+ <p> </p>
+ </font>
+ </td>
+ </tr>
+ </table>
+
+</body>
+
+</html>
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