The IEEE 802.11b standard was released in 1999. The data transmission rate for this standard is 11 Mbps, at a frequency rate of 2.4 GHz. The media access control (MAC) method and security measures of the 802.11b standard are the same as those of the original 802.11 standard. The modulation scheme for generating signals is Direct Sequence Spectrum Scheme (DSSS), along with Complementary Code Keying (CCK). This standard is more commonly known as Wi-Fi. However, the Wi-Fi term is used to refer to 802.11 family wireless networks. This is the slowest of all the wireless networking standards, and also the least expensive.