This White Paper focuses on the deployment options related to MEC federation, especially from an architectural point of view, and with a key focus on ETSI MEC implementations, but also with the aim to provide an open approach considering other standards and technologies. For this purpose, the White Paper firstly analyzes the recent publications of GSMA OPG and recent updates in ETSI MEC and 3GPP specifications, then introduces the synergized architecture supported by both standards organizations, which indicates the background information for the deployment of MEC federation.