Buying some items for my toolkit. Need guidance.

Ordering another USB serial adapter and want to make sure I have the right type of DB9 cables to go with it.

Do I need a straight through cable or null modem (crossover) to connect to a switch? (I.e. mikrotik, Dell, Cisco SG)

I have the Cisco db9 to rj45 already for switches that use that type of console.

Edit: looks like it's a mixed bag depending on manufacturer. Sobim thinking a M/F and F/F straight through and a null M/F adapter. That should cover all 4 possible combos.