What is the EPOCH time and when it is exactly used ?

Question

There is a use case in which two machines are located in same network or different network but both are reachable to each other.
Can remotely captured packets in one machine be seen in wireshark running in another machine on real time basis ?

Answer 1

Unix time (also known as POSIX time or Epoch time) is a system for describing instants in time, defined as the number of seconds that have elapsed since 00:00:00 Coordinated Universal Time (UTC), Thursday, 1 January 1970,

[note 1] not counting leap seconds.

[note 2 It is used widely in Unix-like and many other operating systems and file formats. Because it does not handle leap seconds, it is neither a linear representation of time nor a true representation of UTC.

[note 3] Unix time may be checked on most Unix systems by typing date +%s on the command line.

Example: ********** (ISO 8601:2015-12-21T14:05:59Z)
the Unix time when this page was last generated

Please check the following link for more info - https://en.wikipedia.org/wiki/Unix_time