IT 420 Computer Systems and network

the correct answers are circled in red

ALL I NEED IS EXPLANATION WHY THIS ANSWER IS CORRECT

PLEASE ANSWER ALL QUESTIONS

In IPv4, why was the classful IP addressing scheme changed to class-less (CIDR) addressing? Classtul addressing did not work for wireless networks 128 bit ip aooresses were needed CiDR was required to support new address classes F, G, and H Who uses frames to allow the communication between devices