Answers:
hi,
1 revise TCP/IP <at hand are excellent books on Amazon.com, I'll post the links>
2. gain hands-on experience next to Cisco routers, hubs switches.
3. start working on A+ records, Network +, and Cisco certifications.
4. if you can set up a gridiron <at home. and practice.
and see what 'll take place
Good luck
get a bit time duty related to the pasture...Experience counts more than a amount
I would recommend to achieve a Certification from Cisco (CCNA). Cisco are the best when it comes to network.