LANs are very beneficial for file and harware sharing.
Computer networks can be wired or wireless . Both Wireless and wired have their advantages and disadvantages.

Wireless networks work well if you have laptops and no security issues. And wireless networks are easier to setup too just installing a software is and a wireless device . But they are slower in comparison to wired ones

Wired networks are far more secure and faster but not very good for laptops also installation is a huge fuss.

So well if you have laptops in a network it makes sense to have wireless network but if you are concerned with speed and faster data transfers then go in for wired networks.

So basically you got to list out your preferences before opting for wired or wireless. Preferences as in is security very important to you?
Speed and performance
Cost