The 11667L is a dc to 2 GHz, power splitter that is recommended for source leveling or making wideband ratio measurements using a Keysight 8757 scalar network analyzer.
The 10834A GPIB-to-GPIB adapter is best used in application where limited rear-panel space and other design considerations make cabling difficult by providing a 2.3cm clearance from the first cable for other connectors, switches, and cables.