Cat 6a
500MHz and carries 10Gbps of data up to 100m (328ft) and is used in 10GBASE-T networks
Cat 6
250MHz and carries 1Gbps of data up to 100m (328ft) and can carry 10Gbps of data up to 55m (180ft). 1Gbps is used in 1000BASE-T networks and 10Gbps is used in 10GBASE-T networks
Cat 5
100MHz and carries 100Mbps of data up to 100m (328ft) and is used in 100BASE-TX networks
Cat 5e
100MHz and carries 1Gbps of data up to 100 (328ft) and is used in 1000Base-T networks