This is meant for those just coming into the computer networking career that have little or no knowledge in what computer networking is all about. starting out in the computer networking career you will need to read and practice a alot other to gain the foundational knowledge you will need to build your self with
one of the popular courses you most have hard of is cisco certified network associate;and it the one that is often regquested by employers of labour in nigeria.in other to study this course am sure you have downloaded some books online and all that but but you know just one source of information may not be good for you since you just starting out.so here are the
top 3 cico training sites training sites that teaches you everything about cisco networking at the ccna level

1 freeccnaworkbook.com. this is a great sit to learn ccna on the go,it features such thing a lab and registration is required to get going.
2 9tut.com/9tut.net my best of them
3 omnisecu.com just about everything you need to know in computer networking
these sites are really good and ready to get you started in your networking career