If you're both strong in C and shell programming or Perl (it sounds like you aren't because you've been focused on socket and thread programming) you job opportunitis will be broad.
The socket/thread experience with C only may find the opportunties in pure IT companies (network company like NT, software company like Netsape and Microsoft.) If you can have some C++ experience then you will have more freddom choosing you job.
The socket/thread experience with C only may find the opportunties in pure IT companies (network company like NT, software company like Netsape and Microsoft.) If you can have some C++ experience then you will have more freddom choosing you job.