How long is a subnet mask? ( select one of the four options)

24 bits

32 bytes

32 bits

16 bits

32 bits

Explanation:

 The subnet mask basically contain 32 bits number which performed various function in terms of mask in the IP address. There are mainly two types IP address that are:

The 32 bit is the mask that is used for the host networking address in the single IP address. If the string represent 1, it means that the subnet mask is the part of the network.  

answer(igmp);