The following Bourne shell script and C program can accomplish the same task: read an IP address from user's input and check if the input IP address is valid or not.

Fill in the Blanks!

Shell script

#!/bin/bash echo -n "Please enter the ip:" _______A._______ echo $ip|grep _______B.______________ if [_______C._______] then echo "Please enter IP address following the IP address pattern" exit fi

C programm #include int main(){ int ip1=0,ip2=0,ip3=0,ip4=0; int n=0; n=scanf("_______A2._________", _______B2.__________); if (n!=4) { printf("Please enter IP address following the IP address pattern");