People may be used to different technologies. Many of us just google or see the doc on the fly for such trouble shooting or configuring settings.
But these types of skills/knowledge is different from understanding a computer scientist would require. I would be more worried if someone who claims to know networking doesn't know popular protocols or algorithms like for example the sliding window protocol.
The issues you face in designing, understanding and analyzing such algorithms will change you more than understanding where windows stores the setting to configure one of their protocol parameters.
But these types of skills/knowledge is different from understanding a computer scientist would require. I would be more worried if someone who claims to know networking doesn't know popular protocols or algorithms like for example the sliding window protocol.
The issues you face in designing, understanding and analyzing such algorithms will change you more than understanding where windows stores the setting to configure one of their protocol parameters.