Distance/Correspondence

It's for software or any other engineer, salary not depends upon your qualifications, that comes with your skills developed during work.
A PG in management surely works after 8-10 years experience to promote management positions.
Courses like MBA and system works more for you.

It's actually the other way to complete your education. You gave IGNOU to pursue courses related to your subject.

Hi Basanti,
Candidates who have completed their graduation in any discipline from a recognised university are eligible to apply for the course. At least two years of work experience is also essential for one to join a reputed distance learning institute. Here is the list of some major universities which provide B.Ed course in Distance Education:
-Andhra University
-Bangalore University
-Himachal Pradesh University
- IGNOU, etc.

No, you don't do Ph.D in sciences from distance mode.