What are the symptoms of "Heavily jammed Networks"? I mean, how do I know that except from interfering the ping results? Is it a serious symptom, you know, this "heavily jammed" sounds very scary...

I got a feeling that it might have something to do with hackers-spammers, etc....
The HORRIBLE service of BSNL is not unknown to you... kindly tell me what I need to tell those dumb-witted guys to describe my problem suitably. (My location: Kolkata)
@sagar1234 > Are you facing the same problem as I have described?