Before revision: However, FEPs also perform other vital functions, that are closely linked to transaction applications, including message and transaction switching, multiplexing, transaction security, Quality of Service guarantors, and end-to-end transaction management and reporting.
After revision: However, FEPs also perform other vital functions, that are closely linked to transaction applications, including message and transaction switching, multiplexing, transaction security, quality of service guarantors, and end-to-end transaction management and reporting.