Here we would like to draw your attention to SM55 transaction code in SAP. As we know it is being used in the SAP BC-CST (Client/Server Technology in Basis) component which is coming under BC module (BASIS).SM55 is a transaction code used for THOST Maintenance in SAP.
It comes under the package STSK.When we execute this transaction code, RSM55000 is the normal standard SAP program that is being executed in background.
SAP SM55 menu path
See the possible menu paths to access the same report by avoiding entering the transaction code.
Tools → Administration → Administration → Network → THOST Maintenance
Transaction SM55 technical data table