few things i want to know abouy UDP

1. what is UDP?
2. i know its a protocal, then what differ it from tcp/ip?
3. is it better than tcp/ip and why?

sorry, im a noob at this

btw the osi layer description is stupid, most programmers don't use half of them in coding their programs (or rather, don't give a rat's ass about half of them). it is basically there to allow the business people to see how things work without having to explain in code terms. for example, for a coder, you worry about ip > tcp > http > data... in osi terms, you have to worry about wire > ethernet > ip > tcp > one missing layer (incompassed by tcp and http) > http > browser now why would you do that unless you are building a whole network from ground up specifically for your needs? most of the protocols we use today do not use all seven layers either, some use 4, some use 6... if you ever get your hands on a osi layer vs protocol chart, you can see, not a single one uses all seven. can you imagine? network packets with 6 packet headers... that's gonna eat half of your bandwidth for nothing.