Difference between classful and classless IP (Internet Protocol) Addressing

Currently, I am enrolled in a  CCNA (Cisco Certified Network Associate) Certification Training Course  here in Cebu City, in preparation of course for the CCNA Exam. One major topic discussed here is the IP (Internet Protocol) addressing, an interesting topic under data communication technology. IP address is assigned to a specified client (device) in a network for its identity and is presented in 32-bit (IPv4) with 4 octets separated by a period, for example: 10111001.00010010.11110001.10100011 or represented as 185.18.241.163 in decimal.

So, when discussing about this certain topic, you will encounter the words Classful & Classless IP addressing. What then is the difference between the two? Read more…