To start with, this question isn't really a problem I have but rather a "why is it like this". I'm trying to return to Linux after several years in the Windows world, but I have lost so much... So here's to learning anew. :)
I have a Windows 10 x64 machine acting as file server in my network. I access the shares from Ubuntu Mate 16.04. Main file browser is Caja.
Here's the good part: When I browse the network shares on my network and start to copy a file, max speed is around 600 Mbit. But when I mount the share permanently in Fstab with CIFS (according to https://help.ubuntu.com/community/MountWindowsSharesPermanently) I can utilize my full link speed (1 Gbit). I can utilize the full link speed when using smbclient via Terminal as well.
Can anyone explain to me why this is the case with Caja (and Nautilus from what I can tell) and perhaps give me some links where I can read more about it? Aren't CIFS and SMB basically the same thing?
Update: I'm using an Intel I217-V (rev 04) NIC.