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| author | Sven Eisenhauer <sven@sven-eisenhauer.net> | 2023-11-10 15:11:48 +0100 |
|---|---|---|
| committer | Sven Eisenhauer <sven@sven-eisenhauer.net> | 2023-11-10 15:11:48 +0100 |
| commit | 33613a85afc4b1481367fbe92a17ee59c240250b (patch) | |
| tree | 670b842326116b376b505ec2263878912fca97e2 /Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5 | |
| download | Studium-master.tar.gz Studium-master.tar.bz2 | |
Diffstat (limited to 'Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5')
| -rw-r--r-- | Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5/buttons.html | 110 | ||||
| -rw-r--r-- | Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5/content.html | 157 | ||||
| -rw-r--r-- | Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5/index.html | 29 | ||||
| -rw-r--r-- | Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5/media.html | 21 |
4 files changed, 317 insertions, 0 deletions
diff --git a/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5/buttons.html b/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5/buttons.html new file mode 100644 index 0000000..036b842 --- /dev/null +++ b/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5/buttons.html @@ -0,0 +1,110 @@ +<html>
+
+<head>
+
+
+
+<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
+<meta http-equiv="Content-Language" content="en-us">
+
+
+
+<title>New Page 1</title>
+<script language="JavaScript" src="../../javascript/buttons.js"></script>
+
+
+<script language="JavaScript">
+
+<!--
+
+if (document.images) {
+ image1on = new Image();
+ image1on.src = "../../images/index_ov.gif";
+
+ image2on = new Image();
+ image2on.src = "../../images/glossary_ov.gif";
+
+ image3on = new Image();
+ image3on.src = "../../images/back_ov.gif";
+
+ image4on = new Image();
+ image4on.src = "../../images/next_ov.gif";
+
+ image5on = new Image();
+ image5on.src = "../../images/quiz_ov.gif";
+
+ image1off = new Image();
+ image1off.src = "../../images/index_up.gif";
+
+ image2off = new Image();
+ image2off.src = "../../images/glossary_up.gif";
+
+ image3off = new Image();
+ image3off.src = "../../images/back_up.gif";
+
+ image4off = new Image();
+ image4off.src = "../../images/next_up.gif";
+
+ image5off = new Image();
+ image5off.src = "../../images/quiz_up.gif";
+
+ image1hint = new Image();
+ image1hint.src = "../../images/menu_index.gif";
+
+ image2hint = new Image();
+ image2hint.src = "../../images/menu_glossary.gif";
+
+ image3hint = new Image();
+ image3hint.src = "../../images/menu_back.gif";
+
+ image4hint = new Image();
+ image4hint.src = "../../images/menu_next.gif";
+
+ image5hint = new Image();
+ image5hint.src = "../../images/menu_quiz.gif";
+
+ imageHint = new Image();
+ imageHint.src = "../../images/menu_up.gif";
+}
+
+function changeImages() {
+ if (document.images) {
+ for (var i=0; i<changeImages.arguments.length; i+=2) {
+ document[changeImages.arguments[i]].src = eval(changeImages.arguments[i+1] + ".src");
+ }
+ }
+}
+
+// -->
+</script>
+
+
+<base target="_self">
+
+
+</head>
+
+<body bgcolor="#cccccc" topmargin="0" leftmargin="0" marginheight="0" marginwidth="0">
+
+<table border="0" cellpadding="0" cellspacing="0" height="48" width="100%" style="border-collapse: collapse" bordercolor="#111111">
+ <tr>
+ <td bgcolor="#336666" width="100%" height="48" align="right"><font color="#FFFFFF" size="2" face="Arial"><b> </b></font>
+ <img name="hint" border="0" src="../../images/menu_up.gif" width="136" height="19"></td>
+ <td bgcolor="#336666" align="left" height="48"><a onMouseOver="changeImages('image1', 'image1on'); changeImages('hint', 'image1hint');" onMouseOut="changeImages('image1', 'image1off'); changeImages('hint', 'imageHint');" href="javascript:openIndex('ch2');">
+ <img name="image1" border="0" src="../../images/index_up.gif" width="31" height="48"></a></td>
+ <td bgcolor="#336666" align="left" height="48"><a onMouseOver="changeImages('image5', 'image5on'); changeImages('hint', 'image5hint');" onMouseOut="changeImages('image5', 'image5off'); changeImages('hint', 'imageHint');" href="javascript:openQuiz('ch02');">
+ <img name="image5" border="0" src="../../images/quiz_up.gif" width="31" height="48"></a></td>
+ <td bgcolor="#336666" align="left" height="48"><a href="javascript:openGlossary();" onMouseOver="changeImages('image2', 'image2on'); changeImages('hint', 'image2hint');" onMouseOut="changeImages('image2', 'image2off'); changeImages('hint', 'imageHint');">
+ <img name="image2" border="0" src="../../images/glossary_up.gif" width="31" height="48"></a></td>
+
+ <td bgcolor="#336666" valign="middle" align="left" height="48">
+ <a target="main" onMouseOver="changeImages('image3', 'image3on'); changeImages('hint', 'image3hint');" onMouseOut="changeImages('image3', 'image3off'); changeImages('hint', 'imageHint');" href="../2_1_4/index.html">
+ <img name="image3" border="0" src="../../images/back_up.gif" width="30" height="48"></a></td>
+ <td bgcolor="#336666" width="100%" valign="middle" height="48">
+ <a target="main" onMouseOver="changeImages('image4', 'image4on'); changeImages('hint', 'image4hint');" onMouseOut="changeImages('image4', 'image4off'); changeImages('hint', 'imageHint');" href="../2_1_6/index.html">
+ <img name="image4" border="0" src="../../images/next_up.gif" width="30" height="48"></a></td>
+ <td height="48"><img border="0" src="../../images/menu_bar.gif" width="15" height="48"></td>
+ </tr>
+</table>
+
+</html>
\ No newline at end of file diff --git a/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5/content.html b/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5/content.html new file mode 100644 index 0000000..d79bb1b --- /dev/null +++ b/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5/content.html @@ -0,0 +1,157 @@ +<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</font></b><font face="Arial" size="2" color="#FFFFFF"><b>.1</b></font></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 Overview</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">
+ 2.1.5</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">Packet and circuit switching
+ </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">
+ Packet-switched networks were developed to overcome the expense of
+ public circuit-switched networks and to provide a more cost-effective
+ WAN technology.<p>When a subscriber makes a telephone call, the dialed
+ number is used to set switches in the exchanges along the route of the
+ call so that there is a continuous circuit from the originating caller
+ to that of the called party. Because of the switching operation
+ used to establish the circuit, the telephone system is called a
+ circuit-switched network. If the telephones are replaced with modems,
+ then the switched circuit is able to carry computer data.
+ <img border="0" src="../../images/1.gif" align="absmiddle" width="12" height="12"></p>
+ <p>The internal path taken by the circuit between exchanges is shared
+ by a number of conversations. Time division multiplexing (TDM) is
+ used to give each conversation a share of the connection in turn. TDM
+ assures that a fixed capacity connection is made available to the
+ subscriber. </p>
+ <p>If the circuit carries computer data, the usage of this
+ fixed capacity may not be efficient. For example, if the circuit is
+ used to access the Internet, there will be a burst of activity on the
+ circuit while a web page is transferred. This could be followed by no
+ activity while the user reads the page and then another burst of
+ activity while the next page is transferred. This variation in usage
+ between none and maximum is typical of computer network traffic.
+ Because the subscriber has sole use of the fixed capacity allocation,
+ switched circuits are generally an expensive way of moving data.</p>
+ <p>An alternative is to allocate the capacity to the traffic only when
+ it is needed, and share the available capacity between many users.
+ With a circuit-switched connection, the data bits put on the circuit
+ are automatically delivered to the far end because the circuit is
+ already established. If the circuit is to be shared, there must be
+ some mechanism to label the bits so that the system knows where to
+ deliver them. It is difficult to label individual bits, therefore they
+ are gathered into groups called cells, frames, or packets.
+ The packet passes from exchange to exchange for delivery through the
+ provider network. Networks that implement
+ this system are called packet-switched networks.
+ <img border="0" src="../../images/2.gif" align="absmiddle" width="12" height="12"></p>
+ <p>The links that connect the switches in the provider network belong
+ to an individual subscriber during data transfer, therefore many
+ subscribers can share the link. Costs can be significantly lower
+ than a dedicated circuit-switched connection. Data on packet-switched
+ networks are subject to unpredictable delays when individual packets
+ wait for other subscriber packets to be transmitted by a switch.</p>
+ <p>The switches in a packet-switched network determine, from
+ addressing information in each packet, which link the packet must be
+ sent on next. There are two approaches to this link
+ determination, connectionless or connection-oriented. Connectionless
+ systems, such as the Internet, carry full addressing information in
+ each packet. Each switch must evaluate the address to
+ determine where to send the packet. Connection-oriented systems
+ predetermine the route for a packet, and each packet need only carry
+ an identifier. In the case of Frame Relay, these are called Data Link
+ Control Identifiers (DLCI). The switch determines the onward route by
+ looking up the identifier in tables held in memory. The set of entries
+ in the tables identifies a particular route or circuit through the
+ system. If this circuit is only physically in existence while a packet
+ is traveling through it, it is called a Virtual Circuit (VC).</p>
+ <p>The table entries that constitute a VC can be established by
+ sending a connection request through the network. In this case the
+ resulting circuit is called a Switched Virtual Circuit (SVC). Data
+ that is to travel on SVCs must wait until the table entries have been
+ set up. Once established, the SVC may be in operation for hours, days
+ or weeks. Where a circuit is required to be always available, a
+ Permanent Virtual Circuit (PVC) will be established. Table entries are
+ loaded by the switches at boot time so the PVC is always available.</p>
+ <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">
+ <img border="0" src="../../images/links_icon.gif" width="25" height="25">
+ <b>Web Links</b></font></p>
+ </font><font FACE="Arial" SIZE="2" COLOR="#808080">
+
+ <p>Packet vs Circuit Switching<p>
+ <a target="_blank" href="http://www.cina.org/ac051599/sld011.htm">
+ http://www.cina.org/ac051599/sld011.htm</a></font></p>
+
+ <p>
+ <IMG alt="" height="2" width="1" src="../../images/s.gif"></p>
+ </TD>
+ </TR>
+ </TABLE>
+ </TD>
+ </TR>
+ </TABLE>
+ </TD>
+ </TR>
+ </TABLE><p>
+
+
+
+ </font>
+ </td>
+ </tr>
+ </table>
+
+</body>
+
+</html>
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+
+<head>
+
+<title>Cisco Global Learning Network</title>
+<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
+
+</head>
+
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+ <frame name="graphics" scrolling="no" marginwidth="0" marginheight="0" src="media.html">
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+ <frame name="navigation" scrolling="no" marginwidth="0" marginheight="0" noresize src="buttons.html" target="self">
+ </frameset>
+
+ <noframes>
+ <body>
+
+ <p>This page uses frames, but your browser doesn't support them.</p>
+
+ </body>
+ </noframes>
+</frameset>
+
+</html>
diff --git a/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5/media.html b/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5/media.html new file mode 100644 index 0000000..24ccdd5 --- /dev/null +++ b/Bachelor/CCNA4/en_CCNA4_v30/ch2/2_1_5/media.html @@ -0,0 +1,21 @@ +<html>
+
+<head>
+
+
+
+<title>Flash Graphic</title>
+</head>
+
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+<OBJECT classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000"
+ codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0"
+ WIDTH="100%" HEIGHT="100%">
+ <PARAM NAME=movie VALUE="../../flash/ch02/2_1_5.swf"> <PARAM NAME=quality VALUE=high> <PARAM NAME=bgcolor VALUE=#FFFFFF>
+ <EMBED src="../../flash/ch02/2_1_5.swf" quality=high bgcolor=#FFFFFF WIDTH="100%" HEIGHT="100%" TYPE="application/x-shockwave-flash" PLUGINSPAGE="http://www.macromedia.com/go/getflashplayer"></EMBED></OBJECT>
+
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