My first job was to work as an Information Technology trainer in Informatics Computer School in Dhoby Ghaut in Singapore many years back. I also studied to get my Microsoft Specialist Certificate which were about 50 objective questions for about 1 hour or so. Now, it is very easy to register and get your Chicago CCNA or San Diego CCNA certification to enhance yourself and increase value for employment in the current or even future job.
Courses like Virginia Cisco Course are not cheap but they are well recognised by companies and employers worldwide. They are highly technical courses where you have to study over a period of time before taking your exams online and then wait for the results – whether you will get your certificate or have to resit the exam.
There are other computer courses too like Virginia MCITP and you need to be technically inclined to do well. In some companies, when you have the certification, they will increase your salary even further since you are now more knowledgeable. This is because very few people can pass and get the certification and provided it is part of their bread and butter. Otherwise why bother with such highly technical certificates in the first place. Most of them will probably work in networking line or train people to use Microsoft Office Applications like myself more than 10 years ago.