CompTIA N+ certification is a proof to the candidate's expertise in installing, configuring and troubleshooting network hardware, protocols and peripherals. Upon the completion of this course, the candidate will be able to effectively troubleshoot the networking system.
Source: http://www.bookmybootcamp.com/bootcamp/comptia-networkplus-bootcamp
One
nothing
Study guides for Network Plus Certification can be found and bought online. They can also be found at bookstores. http://www.pchopes.com/ebooks/network_plus.html
Networking jobs, or burger flipper.
In the current economy the job market is very competitive. Any and all education you have is useful and may give you a leg up over the competition. http://www.networkplusnotes.com/network-plus-certification-exam.htm
CompTia. They also offer Network+, Server+, Security+ and others.
Network+ is officially a "vendor neutral" certification. However, a candidate for the designation is expected to have knowledge about Windows Server 2003 and Unix/Linux servers.
courses
You can get a network certification online at a place like this: http://www.gatlineducation.com/networkcertification.html . As for jobs, this certification is useful for getting jobs as a network technician or systems administrator.
Check World Wide Learn. They have a good online program for network certification. Computer Training Schools has everything you need for computer training and network certification.
computer network
The most common network certification is Cisco's CCNA. This certification requires six tests and several months of studying. There are several providers of classroom training to prepare you for the certification tests.