The DCC or Distributed Checksum Clearinghouse is an anti-spam content filter. As of mid-2004, it involves millions of users, tens of thousands of clients and more than 250 servers collecting and counting checksums related to more than 150 million mail mes
The practical work supporting Chapter 4 introduces you to using an oscilloscope to display V/t graphs. This is a very powerful technique for investigating and understanding circuit behaviour and for correcting circuit faults.