Which synchronization method provides frequency only while another also provides Time of Day (ToD)?

SyncE, or Synchronous Ethernet, is primarily designed to provide frequency synchronization over Ethernet networks. It ensures that the clocks of different devices on the network maintain the same frequency, which is crucial for maintaining a consistent data flow and minimizing packet jitter in real-time applications.

On the other hand, protocols such as NTP (Network Time Protocol) provide not only frequency synchronization but also Time of Day (ToD) information, allowing devices to synchronize their clocks to a universal time standard. PTP (Precision Time Protocol) significantly improves time accuracy and can also provide ToD information, making it suitable for applications that require precise time synchronization.

In summary, SyncE is the synchronization method that focuses solely on providing frequency synchronization for Ethernet networks, making it the correct answer in the context of the question.