Which agency collaborates with communications infrastructure?

The correct choice is DHS (CISA), as it plays a vital role in collaborating with and securing the nation's communications infrastructure. The Cybersecurity and Infrastructure Security Agency (CISA), a branch of the Department of Homeland Security (DHS), focuses on enhancing the security and resilience of the critical infrastructure, which includes telecommunications systems. CISA works to identify risks, provide resources, and foster partnerships across various sectors to mitigate threats to communications networks.

While other agencies address transportation and disaster management, they do not have the same direct mandate to oversee and collaborate on communications infrastructure. The Federal Communications Commission, for example, regulates interstate and international communications but primarily focuses on policy and regulatory functions rather than infrastructure collaboration. Understanding these roles clarifies why DHS (CISA) is the primary agency involved in communications infrastructure in terms of collaboration and security efforts.