This Recommendation describes the requirements of the network for the Internet of Things (IoT) that enhance the common requirements of the IoT identified in ITU-T Recommendation Y.2066. The requirements focus on the transport functions of the network, but also cover service support functions. The requirements described in this Recommendation are common requirements for core network, access network and IoT area network. There are a lot of use cases of the IoT with heterogeneous characteristics. Considering the current status of deployments in the IoT market, this Recommendation focuses on the requirements of the network for the IoT with smart meters and sensors as devices. Other use cases will be covered in the future revisions of this Recommendation.