it doesn't sound like you have the qualifications for the job, to be honest.
desktop support is a lot more than 2+ years of networking classes at a local community college.
keep us updated if you get the job.
let me give you an example of what i was asked at my interview last week:
- i was presented with an ISA network card with a BNC/coaxial and ethernet connection. i was told to tell the interviewer all the information regarding the network card (e.g. what kind of card, whether it be PCI, ISA, EISA, AGP -- i initially stumbled and said PCI, but how many PCI cards today have coaxial connectors?)
- i was asked about a user who had an IP address of 0.0.0.0 and couldn't access his "stuff." what to do? what kind of troubleshooting tips do you go through if you're doing this over the phone from miles away and can't get on site? (note: this requires ipconfig, tcp/ip properties, static vs. dhcp, and a working configuration to compare to)
- i was asked about a user who had problems uploading with a proprietary software using SSH protocol. the person using this program was unable to upload. the machine was upgraded from win98SE to winXP using the upgrade-only (not full install) method. what was the problem with the uploading? (this had to deal with the file attributes as a result of ownership that was not transferred using FAT to NTFS)
- when in my past experience have i been "fooled" -- where i thought i had the solution to a troubleshooting problem but was wrong? (i had a good one for this.)
i did surprisingly well on the interview, despite the fact that the questions WERE challenging and i have a number of years of tech support experience. i got a "second interview," where i'll meet the others in the company over lunch (this is a very informal job -- i get to wear jeans to the interview!) in other words, there's a 0.01% chance that i'm not gonna be hired.
i had another job interview where the guy just had me go over my resume, getting into detail about the 4 last IT positions. he didn't do much technical stuff, but he did like that i had a number of years of technical background. i definitely would not have been considered had i not had that stuff on my resume.
as you see, the technical side of things is what makes desktop support critical, and if you don't have those skills, it's hard to get a job like that. marketing and customer service don't really equal tech support at all, but it's nice that you got the interview.
in any event, let us know how it went.