These links are added and are often made of a different material. They can be loops, rings, connectors, chain, wire.
Examples include:
Reuse! Cable ties are generally single-use devices, however they can be reopened with little or no damage by inserting a small flat object between the ratchet and the pawl, and pulling the pawl out. Some models have a mechanism to release the pawl and allow re-use.
These links are made up of the material itself. They are ‘chains’ or linear in nature. See Interlocking for techniques that are not linear.
Sources