networking is not enabled (so ifconfig ping wont work) => we need to enable DHCP (Dynamic Host Configuration Protocol) precisely DHCP clinet which is for Arch it's dhcpcd.

note that Arch comes with systemd wich means we have systemctl command

ip addr => to see if we have a network interface

systemctl enable dhcpcd => to make this service start each time we reboot
systemctl start dhcpcd

this will enable our network interface and we ill have an IP to work with

to test if it works

ping google.com