Ethernet passive optical network empowers computer network associations over telecommunications infrastructure. EPON sends information in variable-length packets of up to 1518 bytes, as indicated by the IEEE 802.3 standard. EPON uses an AES encryption mechanism for both upstream and downstream communications. There are two sorts of EPON: symmetric and asymmetric. Symmetric EPON gives equivalent information rates in both upstream and downstream ways. Asymmetric EPON gives higher downstream information rates than upstream; asymmetric EPON works at 10Gbits/sec downstream and 1Gbit/sec upstream.