One command of an application layer package, whichever package it belongs to.
port says which package and kind names the command within it; together they
decide which of the other fields carry anything. The rest are absent. The same
identifier means a different command in each direction, so uplink decides which
one this is.
One command of an application layer package, whichever package it belongs to.
portsays which package andkindnames the command within it; together they decide which of the other fields carry anything. The rest are absent. The same identifier means a different command in each direction, souplinkdecides which one this is.