D&D 5E - Daggers, Knives, and Darts...... Are there no Knives in 5E....?!?!?!

So, I was looking at the weapon list for 5E and found the Dagger and the Dart, but not the Knife. Are knives gone?

Also, what is the effective ranges for the 3 different weapons?

What is the rate of fire?

Does weapon specialization exist in 5E?

Thanks!!!!

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