Is it permissible to leave unconnected to the target with a piece of twisted pair?

Simple question, I know that the end of the coaxial cable must always be connected or the device on the end plug, in the case of twisted pair cable, this requirement need or you can leave the cable disconnected from the router at all?
April 3rd 20 at 18:38
2 answers
April 3rd 20 at 18:40
Solution
twisted pair connects 2 host-only, unlike coaxial cable. no the plugs are not needed.
April 3rd 20 at 18:42
can

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