Border Security involves monitoring who enters and leaves the country by land, sea or air to ensure that those entering do not pose a threat to national security or public safety. This includes working with other federal agencies such as ICE, CBP and USCIS to enforce laws related to immigration status as well as providing personnel support for securing US borders through activities like patrolling coastlines or manning border crossing points.

Emergency Preparedness & Response focuses on managing disasters within US borders including natural disasters like floods/hurricanes or man-made incidents such as terrorist attacks while also planning for potential future scenarios through collaboration among various departments so that any crisis can be handled effectively in order to maintain public safety. This includes providing resources and personnel when needed in affected regions along with helping develop better risk management models for future occurrences.

Counter Terrorism is responsible for preventing acts of terrorism within the country as well as responding swiftly when an attack does occur by coordinating actions between state/local law enforcement agencies along with federal partners such as FBI/CIA etc., thereby ensuring that appropriate steps are taken towards elimination of any ongoing threat posed by terrorists cells operating domestically.

Transportation Security encompasses overseeing operations of all forms of transportation (airplanes/trains/ships) within US borders so that travelers feel safe traveling throughout different parts of the country without fear of being targeted due to their nationality or beliefs etc.. This includes identifying potential risks associated with particular routes ahead time while also training ground staff on how best they should handle situations where passengers may need additional screening at checkpoints due to being deemed suspicious.

Cyber Security involves protecting critical information systems from malicious actors seeking access into private networks whether it’s through hacking techniques or phishing emails sent out en masse targeting unwitting users who may inadvertently provide passwords giving them access into accounts or databases they shouldn’t have access too. Additionally this branch helps develop policy frameworks regulating how data should be handled throughout different organizations both internally (personnel files) externally (customer records).

Finally Infrastructure Protection works towards making sure buildings across different sectors remain safe from both physical attacks but digital ones as well by instituting stronger authentication processes where necessary while also testing existing systems regularly against external threats coming from sources outside traditional network boundaries; thus enabling more robust defense measures designed specifically around each organization’s needs in order protect its premises from malicious actors attempting gain unauthorized entry into building facilities either online via internet connections or physically through use various tools used bypass access control mechanisms installed around property lines .