How does DHS respond to Cyber incidents?

How does DHS detect and respond to malicious cyber activity. DHS also operates a cyber-information coordination center, the National Cybersecurity and Communications Integration Center (NCCIC), and several operational units. These units respond to incidents and provide technical assistance to information system operators. The NCCIC coordinates the information collected through these channels to create a common operating picture for cyber communities across all levels of government and the private sector.