Did not find a simple way to setup network on arch, so here is a realy quick and easy guide to setup network on arch

wlan0 dhcp

nano /etc/netctl/wlan0
and put this inside

Description='wpa wireless'  
Interface=wlan0  
Connection=wireless  
Security=wpa  
IP=dhcp  
ESSID='MyNetwork'  
Key='WirelessKey'

now you can
netctl enable wlan0 && netctl start wlan0

dhcp eth0

nano /etc/netctl/eth0 and put this inside

Description='eth0'  
Interface=eth0  
Connection=ethernet  
IP=dhcp  

now you can
netctl enable && netctl start eth0

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