Since HTTP is a stateless protocol, when a client makes a number of requests to the server, how does the server uniquely identify a particular client's requests over a period of time say t1, t2, t3...

I'm working on implementing my own analytics system. One part of it consists of tracking where users originated from. I use UTM tags for this. Reading UTM tags from the query parameters is quite ea...

The scenario is that a user should get notification (say via typical JS alert or redirect etc) when her session is about to be expired. Couple of ways this can be done is Using javascript time o...

As many of you probably know, online banks nowadays have a security system whereby you are asked some personal questions before you even enter your password. Once you have answered them, you can ch...