Final answer:
To implement a 10 Gigabit Ethernet designation for use with a SONET network, choose the 10GBaseLR standard.
Step-by-step explanation:
To implement a 10 Gigabit Ethernet designation for use with a SONET network, you should implement the 10GBaseLR standard. This standard is designed for long-reach fiber optic connections, allowing for transmission over longer distances than other options. It is commonly used in network applications that require high bandwidth, such as data centers or enterprise networks.