Any hardware equipment that can perform tests, connected in some way or related to Computers.
For standalone analyzer that do not require computer and not computer related analyzers/testers use: Business/Electronics_and_Electrical/Test_and_Measurement/

For SW tools like sniffers parsers data loggers without HW part use: Computers/Software/Diagnostics/

For Calibration tools use Business/Industrial_Goods_and_Services/Calibration_and_Testing

Computer, Computer Hardware and Computer Networks related Protocol Analyzers, Data Analyzers, Logic Analyzers, Network Analyzers. Only HW devices ( not SW tools ). Only computer related ( not standalone )
For standalone analyzer that do not require computer and not computer related analyzers/testers use: Business/Electronics_and_Electrical/Test_and_Measurement/

For SW tools like sniffers parsers data loggers without HW part use: Computers/Software/Diagnostics/