Contention Network access method where devices compete for the right to access the physical medium. A committee that includes the United States FNC and its counterparts in North America and Europe. The core gateway system formed a central part of Internet routing in that all groups must advertise paths to their networks from a core gateway. A cracker is an individual who attempts to access computer systems without authorization. These individuals are often malicious, as opposed to hackers, and have many means at their disposal for breaking into a system.
All network devices contend equally for access to transmit.
If a device detects another device's signal while it is transmitting, it aborts transmission and retries after waiting a very brief pause. A method of detecting errors in a message by performing a mathematical calculation on the bits in the message and then sending the results of the calculation along with the message. The receiving work-station performs the same calculation on the message data as it receives it and then checks the results against those transmitted at the end of the message. If the results don't match, the receiving end asks the sending end to send again.