XPS 8930, using wireless Wi-Fi as well as network card

@ejn63​ Thank you for replying. Now I need to find out what and where I can obtain a crossover cable.

I will have a wireless connection to my XPS8930. I will then take a network cable (Cat6) and plug one end into the XPS and the other into my Synology.
Are you saying that an ordinary network cable will not work? 

Connecting two computers without a hub or switch requires a crossover cable -- the NAS is essentially a dedicated computer so it likely will as well.  You can also use a hub, switch, router and a pair of standard network cables.  You'll need to set up both the NAS and computer with dedicated IP addresses to connect them directly;  a router can be set up with DHCP service.

Crossover cables are easy to find.  Example:

https://www.amazon.com/Belkin-6-Foot-CAT5e-Crossover-Networking/dp/B00080E1M0/ref=sr_1_3?crid=2E4LQMF9EPOI5&keywords=crossover%2BEthernet%2Bcable&qid=1692370110&sprefix=crossover%2Bethernet%2Bcable%2Caps%2C85&sr=8-3&th=1

@ejn63​ Thank you very much for taking the time to explain that./ I have placed an order with Amazon for both a crossover cable as well as a Star-tech crossover adapter that lets me use any regular cable. It would be good to have both.
I am waiting on the fiber install tech to make his visit and do the changeover. I am excited about the extra speeds this will give me. The (up to) 2 Mb/s (megabits per second) upload speeds were very restrictive and so having as much 25, will be great. (less of course, the subtle loss due to the distance between the router and my desktop)

@maxaryaman2004​ , @ejn63 ,  no intention of being rude but I am very confused and not understanding this thread.  If someone could enlighten me.

The title and original poster asked:  can I use the wireless network to connect the PC to a Synology NAS.

The answer is Yes, use a switch, a router, or a cable.

OP's okay, I am going to order crossover cable and crossover adapter.

Maybe I am slow or didn't get the punchline.  But, where is the wireless connection part???  What is the fibre optic router upgrade has anything to do with wired connection between PC and the NAS, in term of transfer speed???

I think that in most cases, you can map a NAS drive wirelessly if it (NAS) is connected to the network (router).  Regardless of how fast the speed of network can bring, the throughput speed of a NAS is fixed.  Therefore, seeing the info exchanged in this thread, it gets very confusing.

In the first post, the author specifically mentions the new setup won't have a wired option -- I'm not exactly sure how that works, but made the assumption the service will be Wifi only to the Internet.  That's why I mapped out a "wifi internet, wired NAS option" in light of the fact that the other statement was the desire to keep the wired connection to the NAS.

I don't know where the fiber comes in -- but there are now plenty of fiber providers that set up a wireless/router with only one internal port (for the ONT internal connection) and are otherwise completely wireless.  Depending on the setup, that router can easily be replaced with a multiport wired/wireless router.

The relatively low speeds and async nature quoted had me wondering if it's some sort of a shared connection -- fiber in my area starts at 300 MBps and it's sync up/down -- not async as ADSL or cable is.  I guess the author will have to see exactly what the setup is, but the bottom line is that both the wired and wireless adapters in the system can be used at the same time.

@ejn63​ it's how I understood the author (OP) at opening of thread.  The XPS will not have access to new router with ethernet connection.  So is the Synology NAS.  Therefore, OP must exploring the option for a wireless connection.  The new upgrade speed could be 2.5 Gigabit and OP is too excited and may think that it could improve the throughput between the NAS and the PC.  Hence the ranting, but that was all my guesses.

Your response was neutral as how a NAS could be connected but it did not provide any wireless solution as this thread inquired.  Not much you could do, but Author (or OP) closed the thread with a wiring resolution.  Have you look into if a wireless dongle could be installed to the NAS?

I had no input and offered no solution in this thread, so you could see my concerns have nothing to do with whom solution should be selected.  There are others in this community following this thread as well.  With better clarifications and some insights, if I missed something, I could pick up a long the way just for learning sake. 

@Chino de Oro​ 
Hi,

My new telecom's fiber optic install will offer me only a wireless connection to my Dell XPS8930 desktop computer. It used to connect by ADSL through the built in ethernet card, but now will connect to the internet directly through the wireless card built into it.
The Synology NAS I use, was connected to the back of the ADSL router, as was the 8930, however, that will no longer be the case.
My intent is to connect the 8930 to internet via the built in wireless module, and then use the built in ethernet card to connect to my NAS, using a crossover network cable, based on what the previous poster has told me.
As I understand things, when connected this way, the NAS will still be able to connect to the internet, by through my wireless connect, even though this will not be the most efficient was to do things.
At least this way, I will still have a continous real-time backup from the 8930 to the NAS, which in turn can connect to the internet and do a data backup to Synology's C2 service, as well as send data to my Amazon S3, as well pull from OneDrive, Google Drive, and Dropbox. It also does a nightly incremental backup from the the NAS to a hardwired USB drive.

Sure hope I understood everything correctly. 

Thank you both for giving me more clarification on the subject.  I appreciate the time taken from both.  As mentioned, it was just a curiosity if the query is satisfied or achieved.  The confusion was mine, not with posters on this thread.  There was no questioning of authenticity reason for the question or the answer from neither.

If you have succeed with the setup, let run a test of the throughput to see if you are happy with the result as expected.  If not, you can post back and exploring different idea with different setup process.  I can be benefit from learning others posts as well.  

@Chino de Oro​ Got my fiber optic install today and tried using the XPS8930 built-in wi-fi to receive internet signals. That works just fine.
As suggested, I tried using a crossover cable between the XPS8930 ethernet card and my Synology NAS. This does not work as I needed, as is slow to boot.
Solution was to go back to having a wired CAT6E cable and multiport switch to provide regular connections to the internet through the ethernet card on my XPS8930 and through a regular cable between the switch and NAS.

It is now back to working as it did before. The only catch is that instead of 150Mbps throught the fiber, I get 75Mbps through the multiport switch and hard wiring. I can live with that.