SDU (Session Data Unit)=======================Default data unit transmitted in Oracle 11g is 8kb.but for data guard configuration, set SDU to 32kbon SQLNET.ORABDP (Bandwidth-Delay Product)=============================we need to calculate BDP to determine the appropriate size for thereceive and send buffer sizes. BDP is calculated as:Bandiwdth * Latency * 3---------------------------------------------------------- T1 - 1.544 megabits per second T3 - 43.232 megabits per second (equivalent to 28 T1s) OC3 - 155 megabits per second (equivalent to 84 T1s) OC12 - 622 megabits per second (equivalent to 4 OC3s) OC48 - 2.5 gigabits per seconds (equivalent to 4 OC12s)----------------------------------------------------------after we calculated BDP, we can set the SEND_BUF_SIZE andRECV_BUF_SIZE values as determined by the BDP algorithm both atTNSNAMES.ORA and LISTENER.ORA