The first is the MCSA/MCSE course. These are Microsoft courses which comprise of various MCP exams which add up to the MCSA/MCSE. These are also branched off into DBA roles or System Administrator roles. One exam that counts towards the MCSA is what is called the A+ exam. The A+ is not a Microsoft exam but covers hardware and software maintenance and repairs and is good foundation, especially if you have no prior knowledge.
The second path is the Cisco route. This involves learning to configure Cisco equipment like routers and switches and getting them working in harmony. Cisco courses start off with the CCNA which is the foundation and then branch off in 5 different directions (networking, VOIP, etc....), leading to the very prestigious CCIE. These qualifications are sought after by ISP's and telco companies. Cisco engineers can be paid ALOT of money with more qualifications and experience.
Anyway, that is something for you to think about.