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MSc in computer networking is a sufficient qualification for applying in a private college or university. Only thing is you have to search for vacancies in your particular branch that is computer networking.
As per my knowledge there are hundreds of colleges/ universities where this is taught so you have to find out from job sites or newspaper regarding the vacancies for teaching there.
Anyway if you are aspiring for job in Govt colleges you will have to go through NET test which is taken by CBSE on behalf of UGC for appointment of lecturers in Govt colleges.
Computer networking is a very wide area having ample opportunity specially in private sector so getting a job will not be a problem.
Knowledge is power.