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        !             8: 
        !             9: <A HREF="mpd.html"><EM>Mpd 5.6 User Manual</EM></A>
        !            10:  <b>:</b> <A HREF="mpd17.html"><EM>Configuring Mpd</EM></A>
        !            11:  <b>:</b> <EM>Compression (CCP) layer</EM><BR>
        !            12: <b>Previous:</b> <A HREF="mpd23.html"><EM>Encryption (ECP) layer</EM></A><BR>
        !            13: <b>Next:</b> <A HREF="mpd25.html"><EM>MPPC protocol</EM></A>
        !            14: 
        !            15: 
        !            16: <HR NOSHADE>
        !            17:   <H2><A NAME="24"></A>4.6. Compression (CCP) layer<A NAME="compression"></A></H2>
        !            18: 
        !            19: <p>This chapter describes commands that configure the Compression Control
        !            20: Protocol (CCP) layer. All of these commands apply to the currently
        !            21: active bundle.</p>
        !            22: <p>To use CCP you should enable compression at the bundle level.
        !            23: To allow compression to be negotiated you should enable here some of 
        !            24: compression protocols.</p>
        !            25: <p>
        !            26: <dl>
        !            27: 
        !            28: <dt><b><code>set ccp accept <em>option ...</em> </code></b><dd>
        !            29: <dt><b><code>set ccp deny <em>option ...</em> </code></b><dd>
        !            30: <dt><b><code>set ccp enable <em>option ...</em> </code></b><dd>
        !            31: <dt><b><code>set ccp disable <em>option ...</em> </code></b><dd>
        !            32: <dt><b><code>set ccp yes <em>option ...</em> </code></b><dd>
        !            33: <dt><b><code>set ccp no <em>option ...</em> </code></b><dd>
        !            34: <p>These commands configure various CCP options. Each direction of
        !            35: traffic (transmit and receive) is independent from the other.
        !            36: All options default to <code><b>disable</b></code> and <code><b>deny</b></code>.</p>
        !            37: <p>The <code><b>enable</b></code> and <code><b>disable</b></code> commands determine
        !            38: whether we desire the corresponding option on received data.
        !            39: The <code><b>accept</b></code> and <code><b>deny</b></code> commands determine
        !            40: whether we will allow the peer to request the corresponding option
        !            41: (which we must enable on our transmitted data).</p>
        !            42: 
        !            43: <p>The <b><code>yes</code></b> command is the same as
        !            44: <code><b>enable</b></code> and <code><b>accept</b></code>.
        !            45: The <b><code>no</code></b> command is the same as
        !            46: <code><b>disable</b></code> and <code><b>deny</b></code>.</p>
        !            47: 
        !            48: </dl>
        !            49: </p>
        !            50: 
        !            51: <p>The options available at the CCP layer are listed below.</p>
        !            52: <p>
        !            53: <dl>
        !            54: 
        !            55: <dt><b><code>pred1</code></b><dd><p>This option enables Predictor-1 (RFC 1978) compression.
        !            56: Predictor-1 compression is much faster then Deflate.</p>
        !            57: <p>This option requires ng_pred1 Netgraph node type, which is present
        !            58: since FreeBSD 6.2-STABLE of 2007-01-28.
        !            59: If there is no ng_pred1 in system, this algorithm is supported
        !            60: in user-level, but will consume more CPU power.</p>
        !            61: <p>The default is disable.</p>
        !            62: 
        !            63: <dt><b><code>deflate</code></b><dd><p>This option enables Deflate (RFC 1979) compression.
        !            64: Deflate compression usually gives better compression ratio then Predictor-1.</p>
        !            65: <p>This option requires ng_deflate Netgraph node type, which is present
        !            66: since FreeBSD 6.2-STABLE of 2007-01-28.</p>
        !            67: <p>The default is disable.</p>
        !            68: 
        !            69: <dt><b><code>mppc</code></b><dd><p>This option enables MPPC compression/encryption subprotocol.
        !            70: For details see 
        !            71: <A HREF="mpd25.html#mppc">mppc</A>.</p>
        !            72: <p>The default is disable.</p>
        !            73: 
        !            74: </dl>
        !            75: </p>
        !            76: <H3>4.6.1. <A HREF="mpd25.html#25">MPPC protocol</A></H3>
        !            77:  <HR NOSHADE>
        !            78: <A HREF="mpd.html"><EM>Mpd 5.6 User Manual</EM></A>
        !            79:  <b>:</b> <A HREF="mpd17.html"><EM>Configuring Mpd</EM></A>
        !            80:  <b>:</b> <EM>Compression (CCP) layer</EM><BR>
        !            81: <b>Previous:</b> <A HREF="mpd23.html"><EM>Encryption (ECP) layer</EM></A><BR>
        !            82: <b>Next:</b> <A HREF="mpd25.html"><EM>MPPC protocol</EM></A>
        !            83: 
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