How many ports are available?

65535

It is interesting to know that the number 65535 represents a famous number for IT specialists.  Not too many people know that the number 65535 represents the number of TCP and UDP ports available at an IP address.  Keep in mind that port 0 is reserved. Needless to say, 65535 is an extremely popular number in the field of computing because it is the highest number which can be represented by an unsigned 16 bit binary number.