Good enough for what ?
To start a career, a certification at least shows some ability and may well get you the job over someone who does not have this. But it will not mean that you start any further up the ladder, as experience is the key in networks, there is no substitute.
If you do want to look at certification the CCNA is widely recognised and accepted as a good grounding in networks, and there are a lot of places with Cisco equipment. It also covers the basics of netowrks and how they operate, and touches on routing protocols as well. You can study on your own, there are several good books to help with this, or you could sign up to the Cisco Academy program, which has a structured course, and tutors to help when you get stuck (but you can always ask questions here).