When using a port monitor, I noticed that the states of some of the connections where categorized as “unknown”. What does this mean?
Answer
It means that the connection state is unknown.
EDIT
Upon further information:
I’m using Cport from Nirsoft.
A quick check of their documentation says “items with unknown state (the state column is empty) are displayed.” So my answer was actually more right than I realized. =) This means that no explicit state for the port is available. Probably meaning that it’s not explicitly denying the connection attempt; it’s just staying silent.
For further information you’d need to look through the source code, but since it’s not open source you’ll need to contact the vendor for deeper clarification.
Attribution
Source : Link , Question Author : jax , Answer Author : Community