You could either add attributes to the Asset object / table to contain the IP Address and MAC address, and these will be available on the root asset record.
https://www.ibm.com/docs/en/masv-and-l/maximo-manage/continuous-delivery?topic=objects-adding-attributes
or you may considering using an asset specification and including those values as part of the specification.
https://www.ibm.com/docs/en/maximo-eam-saas?topic=classifications-overview
If you go the specification route, you can get the values off the ASSET/ASSETSPEC on the MXAPIASSET integration object.