The most likely reason an insurance brokerage would enforce VPN usage is to encrypt sensitive data in transit.
A VPN (Virtual Private Network) is a technology that creates a secure and encrypted tunnel between two or more devices over a public network, such as the internet. A VPN allows users to access remote resources or services as if they were on the same private network, while protecting their data from interception, modification, or spoofing by malicious actors. An insurance brokerage would use a VPN to protect the confidentiality and integrity of sensitive data, such as customer information, financial records, or insurance policies, that are transmitted over the internet. References: CompTIA Network+ N10-008 Certification Study Guide, page 403; The Official CompTIA Network+ Student Guide (Exam N10-008), page 15-5.