1 You cannot use the DHCP Relay Agent component on a computer running the DHCP service, the network address translation (NAT) routing protocol component with automatic addressing enabled, or Internet Connection Sharing (ICS).
Reliability refers to the consistency of a measure. A test is considered reliable if we get the same result repeatedly. For example, if a test is designed to measure a trait (such as introversion), then each time the test is administered to a subject, the results should be approximately the same.
Reliability is something that every scientist, especially in social sciences and biology, must be aware of. In science, the definition is the same, but needs a much narrower and unequivocal definition.