The correct options are Network proxies and Perimeter firewalls.

Network proxies act as intermediaries between clients and servers and can route requests, terminate and reinitiate TLS connections, and enforce access and content policies. They are able to inspect and filter traffic and this makes them effective at regulating how information is transferred and at protecting data in transit.

Perimeter firewalls enforce network boundary controls and can allow or block traffic based on IP addresses, ports, protocols, and stateful inspection. They reduce exposure of internal services to external clients and they help prevent unauthorized connections and common network attacks while controlling what data flows across the boundary.

Load balancers are primarily designed to distribute incoming traffic across servers to improve scalability and availability. They do not by themselves provide the same level of traffic inspection or policy enforcement that proxies and firewalls provide, even though some load balancers may offer limited security features.

Bearer tokens are credentials used for authentication and authorization and they help control access to resources. They do not route or filter network traffic or perform network level inspection, so they are not a mechanism for regulating or protecting the transfer of data between services and external clients.

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