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Technical Q&As: Core Foundation
Core Foundation provides support for the major networking protocols and services. Core Foundation defines several opaque types that correspond to Mach ports, message ports, BSD sockets, and URLs. Developers can use these objects to communicate between multiple threads and processes, and between computers over a network.

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Resolves may return an IPv6 address in Panther (HTML)
QA1298: Explains why you get an IP address of 0.0.0.0 when resolving a Rendezvous service.
2005-01-10
Rendezvous enforces the TXT record format in Panther (HTML)
QA1306: Explains how mDNSResponder enforces the proper TXT record format in Panther.
2004-07-14
Updating the TXT record of a Rendezvous service (HTML)
QA1302: Explains how to update a Rendezvous TXT record while running on either Jaguar or Panther.
2004-07-14
Getting a Packet Trace (HTML) ()
QA1176: Lists tools available for looking at the network packets on the wire.
2004-07-13
Discovering all advertised Rendezvous service types (HTML)
QA1337: Explains how to discover all Rendezvous service types being advertised on the local network.
2004-06-01
Downloading through a proxy server in Mac OS X (HTML)
QA1296: Explains when downloading through a proxy server will work, and when it will fail.
2003-10-29
URL Access vs. CFNetwork (HTML)
QA1291: Explains when to choose URL Access or CFNetwork when downloading files from within your application.
2003-10-29
Internet Connect Speed (HTML) ()
QA1165: Describes how to get the modem connection speed from the System Configuration framework dynamic store.
2003-03-26
Accessing HTTPS Proxy Settings (HTML) ()
QA1234: Describes how to programatically access Secure Web Proxy information.
2003-02-19
Getting the User and Computer Name (HTML)
QA1078: Describes how to get the user and computer name on Mac OS X.
2001-10-30
The "chosen" node in the device tree (HTML)
HW88: Describes how to find the "chosen" node in the Open firmware device tree.
2000-09-05
Changing the TCP Window Size (HTML)
NW47: Describes how to change the TCP window size in Open Transport.
1997-03-14
T_DATA_REQ vs M_DATA TPI Message Blocks (HTML) ()
NW42: Explains why OT passes data to a TPI module using M_DATA message blocks instead of M_PROTO+T_DATA_REQ.
1996-10-25