(1) the same old questions churning
Any question without an accepted answer is periodically "updated" by the system to bring it back up to the top. This happens on all sites, but yes it is more noticeable on lower traffic sites. Please remember to accept answers on your questions to help avoid this effect.
You also get questions that resurface when someone new comes along to add an answer or edit an existing answer/question. Or when someone is doing something like trying to clean up tags (remove incorrect tags, add correct tags, etc).
(2) very little questions posted by anyone with a reputation over 1
In part because many questions are asked by unregistered users (which always start with 1 reputation) but also because many users don't find the site until they have a question to ask. However this is also true of many SE sites.
For example, I just checked the top 10 questions on SuperUser and 6 of them were from users with 1 rep when the question was posted. I don't know if this is normal, high or low for that site, but it is just serves as an illustration.
A vast majority of the activity is by 1 or 2% of the users
Assuming you are disregarding point #2 above, this is typically true on other sites as well when it comes to answers, flags, edits, voting, etc. It's a fact of life that a very small percentage of users will make the largest contribution to any online community.
Compared to many other Stack Exchange sites, this site sees little activity.
Why is this?
Primarily because "network professionals" is a fairly limited audience. Compare the number of network professionals to say the number of people doing home improvement (see Home Improvement). We clearly have a much smaller potential audience to start with than that community.
Further, not everyone who is a network professional visits this site. Maybe they aren't aware of it? Maybe they don't like SE for personal reasons? Maybe because they are happy with the resources they are using currently? But more do find it all the time and as we grow we will be found in search engines more often.
I will say that based on nearly all the statistics (visits, new visits, page views, votes, etc), we continue to trend upward. On a few of them, it looks like we had a burst around when the site was launched and a bit of a drop off shorty after, but we are still up over the numbers we had 12 months ago.
Could we grow the site/community faster? Sure, we could easily do so by lowering standards and allowing home/consumer networking questions, education/certification questions, etc. But that would dilute the audience this site was launched to attract and ultimately hurt this community in the long run.
As one of the closer parallels to the community we are trying to grow here, I suggest interested parties should spend some time reading at ServerFault Meta. They have dealt with many of the same issues trying to maintain a site targeted at professionals and problems they have had when standards were not maintained.