Have you ever tried to explain the difference between Link State and Distance Vector to your spouse? To your 8 year old?

Have you ever rambled on cheerfully and enthusiasticly about your network topology, and suddenly realize that your audience wandered away several minutes earlier?

Does your grandmother ever ask you what you do for a living, and after a 5 minute explanation, she blinks, then asks you what you do for a living?

Have you ever wondered if the holes in your acoustic ceiling tile are fully meshed?

Do you lose patience with people that can't convert binary to decimal in their head?

Have you ever announced to a roomful of people that you don't care what happens above layer 4?

If you answered yes to at least 4 of the above, you may have a promising internetworking career ahead of you, and are qualified to test for Cisco certification. Otherwise, just go to braindumps.com and become an MCSE.