blank.gif (43 bytes)

Church Of The
Swimming Elephant

6.6. Address-and-Control-Field-Compression (ACFC) Connected: An Internet Encyclopedia
6.6. Address-and-Control-Field-Compression (ACFC)

Up: Connected: An Internet Encyclopedia
Up: Requests For Comments
Up: RFC 1661
Up: 6. LCP Configuration Options
Prev: 6.5. Protocol-Field-Compression (PFC)
Next: Security Considerations

6.6. Address-and-Control-Field-Compression (ACFC)

6.6. Address-and-Control-Field-Compression (ACFC)


This Configuration Option provides a method to negotiate the compression of the Data Link Layer Address and Control fields. By default, all implementations MUST transmit frames with Address and Control fields appropriate to the link framing.

Since these fields usually have constant values for point-to-point links, they are easily compressed. This Configuration Option is sent to inform the peer that the implementation can receive compressed Address and Control fields.

If a compressed frame is received when Address-and-Control-Field- Compression has not been negotiated, the implementation MAY silently discard the frame.

The Address and Control fields MUST NOT be compressed when sending any LCP packet. This rule guarantees unambiguous recognition of LCP packets.

When the Address and Control fields are compressed, the Data Link Layer FCS field is calculated on the compressed frame, not the original uncompressed frame.

A summary of the Address-and-Control-Field-Compression configuration option format is shown below. The fields are transmitted from left to right.

    0                   1
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
   |     Type      |    Length     |





Next: Security Considerations

Connected: An Internet Encyclopedia
6.6. Address-and-Control-Field-Compression (ACFC)


Protect yourself from cyberstalkers, identity thieves, and those who would snoop on you.
Stop spam from invading your inbox without losing the mail you want. We give you more control over your e-mail than any other service.
Block popups, ads, and malicious scripts while you surf the net through our anonymous proxies.
Participate in Usenet, host your web files, easily send anonymous messages, and more, much more.
All private, all encrypted, all secure, all in an easy to use service, and all for only $5.95 a month!

Service Details

Have you gone to church today?
All pages ©1999, 2000, 2001, 2002, 2003 Church of the Swimming Elephant unless otherwise stated
Church of the Swimming Elephant©1999, 2000, 2001, 2002, 2003 is a wholly owned subsidiary of Packetderm, LLC.

Packetderm, LLC
210 Park Ave #308
Worcester, MA 01609