projects after CCNA course

sir\madam,
i am presently engiineering student of computer science branch.i am interested in netwoking.now i am preparing for CCNA course.i want to da a project based on the cousre i am studing so that i can understand the project clearly.so.
-what are the projects can be done after completing CCNA course.?
-what are all the requirments for that projecs?
-is there any need to prepare for any programming language other than c or c++.as they are only highlevel languages i now?
– what can be estimation of the cost of the project?