Replication is a process of making a copy, an exact duplication or precise reproduction of something. Replication occurs when information is distributed. Digital technology like a computer makes it easy to reproduce copyright material. Replication occurs when a CD is ripped and burnt, when a mirror is working and a backup is complete.
Replication is an integral part of network design and forms the basic command for the spread of the virus and the worm. A Hash Table can potentially generate random hashes that are equal. This replication is referred to as collision, and is a bad thing.