Generally, DB2 is licensed by the number of CPU's (now measured as Processor Value Units) or users. The actual client software is free regardless of whether you license by processor or user.
Since you have 200 PVUs, you have a CPU license. 200 PVU's is equal to two dual-core Intel/AMD processors, or one quad-core Intel/AMD processor. If you have a IBM Power CPU or other (Sun Sparc, HP, etc) then the PVU count may be different.