Configuring network interface with Static IP address on RHEL 7

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I am new to RHEL7 and I am running it in Virtualbox.. Right now its using DCHP but I want it to have the same IP address all the time,

I been using this
https://linuxconfig.org/configuring-network-interface-with-static-ip-address-on-rhel-7

but how do I find out the values for the following:
NETMASK="255.0.0.0"
GATEWAY="10.1.1.1"

Can someone please help.. I am new to this

Johnathan Smith's picture

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