You can refer this book for cover A/L Network lesson. This is a complete lesson guide which gonna help with the theoretical facts practical facts. Here we have included Sub net exercises to practice.
The theory book consists a complete note for Data Communication and Networking lesson in your Advanced Level ICT syllabus. The work book prepared according to the theory book and the students can fill the sections on work book by referring the theory book. Networking lesson is one of important lesson on your syllabus as this carries 10 -14 marks on overall paper. Therefore it is important to gain clear knowledge on this lesson.