3Com Webcache 3000 (3C16116), Webcache 1000 (3C16115) manual Glossary

GLOSSARY

3Com Network The 3Com umbrella management system used to manage all of 3Com’s Supervisor networking solutions.

10BASE-TThe IEEE specification for 10 Mbps Ethernet over Category 3, 4 or 5 twisted pair cable.

100BASE-TXThe IEEE specification for 100 Mbps Fast Ethernet over Category 5 twisted-pair cable.

auto-negotiationA feature on twisted pair ports that allows them to advertise their capabilities for speed, duplex and flow control. When connected to a port that also supports auto-negotiation, the link can automatically configure itself to the optimum setup.

bandwidth The information capacity, measured in bits per second, that a channel can transmit. The bandwidth of Ethernet is 10 Mbps and the bandwidth of Fast Ethernet is 100 Mbps.

baud The signalling rate of a line, that is, the number of transitions (voltage or frequency changes) made per second. Also known as line speed.

cache Stores copies of frequently accessed objects close to users and serves them to users when requested.

cache hit An object in the cache that can be served directly to the client machine.

cache miss An object that is not in the cache or that is in the cache but no longer valid. In both cases, the Webcache must get the object from the origin server.

client machine A computer, printer or server that is connected to a network. In this User Guide, client machine is used to describe a machine on your network which is running a Web browser such as Internet Explorer or Netscape Navigator.