Office Network setups

We've just moved into a office we're renting that has ethernet jacks in the wall and also has WiFi.  So we can connect a CAT5 from a laptop to an Ethernet jack in the wall and get online.  Or, telling the laptop to look for networks, it finds a wireless signal that also gets us onto the Internet.  Now I'm trying to understand what must be in the building to provide this.

I assume there's a cable that comes in from Comcast, or someone like that, that goes into a big router in a closet somewhere and that router creates a hundred or so RJ45 Ethernet ports that get wired out to the offices.  This router must also create a WiFi signal that can be picked up in any office.  

Does this sound about right?  

Within our office, are devices that connect over the WiFi connection on the same network as devices that plug directly into the wall RJ45?

Will each office have it's own network, that other offices can't get onto?  

Thanks for any insight here.
stevaAsked:
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masnrockCommented:
It sounds like you are either subleasing space OR the owner of the building is leasing out areas that they previously occupied. Either of those scenarios would make sense. Your outlets are obviously connected to a switch somewhere. You need to inquite into exactly where that is, and inquire on whether you get gain access to install your own equipment that will exclusively serve the network outlets in your space.

You may also want to find out what your organization agreed to in leasing the space. Sometimes there are agreements to actually use the landlord provided internet. I've done consulting in a case where I ended up having to create segregated networks on the landlord provided firewall.
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Lee W, MVPTechnology and Business Process AdvisorCommented:
Agreed.  Internet comes in from ISP.  Goes to some kind of router - could be a cheap linksys box or it could be an expensive Cisco system or somewhere in between.  There's probably one or more network switches (again, could be cheap, could be expensive).  As for a "private" network, probably not.  You are probably sharing.  However, depending on the agreement, it's POSSIBLE someone setup a VLAN or separate physical switch and internet for the company which would be private.   But really, without more information and the ability to compare the configs to others in the space who are not with your company, it would be hard to say with any accuracy.
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William MillerInventory/IT ConsultantCommented:
If you're in a shared office space then there is likely a single closet that handles the overall network of the building. Depending on the location and the reputability of the leasing agency, you should have your own segregated network. The problem here is that even though segregated (if it is), you share bandwidth across multiple offices that are potentially not your own which will ultimately bog down your own internal network. The best thing for you to do is get with someone to review the lease and if possible, install your own network equipment and bring in a dedicated connection for your business specifically. Coming into an office space this is essentially "hot" when you get there tends to point towards a shared location.
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stevaAuthor Commented:
Thanks guys.  I'll be talking to the building owner today and just wanted to get some background first.
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Wireless Networking

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