Explanation
Decreasing the lease duration on the DHCP server will cause clients to renew their IP address leases more frequently, freeing up IP addresses for other clients to use. References: CompTIA Network+ Certification Study Guide, Chapter 3: IP Addressing.

An on-path attack (also known as a man-in-the-middle attack) is a type of security attack where the attacker places themselves between two devices (often a web browser and a web server) and intercepts or modifies communications between the two1. The attacker can then collect information as well as impersonate either of the two agents. For example, an on-path attacker could capture login credentials, redirect traffic to malicious sites, or inject malware into legitimate web pages.
The other options are not correct because they describe different types of attacks:
*IP spoofing is the practice of forging the source IP address of a packet to make it appear as if it came from a trusted or authorized source2.
*VLAN hopping is a technique that allows an attacker to access a VLAN that they are not authorized to access by sending packets with a modified VLAN tag3.
*Rogue DHCP is a scenario where an unauthorized DHCP server offers IP configuration parameters to clients on a network, potentially causing network disruption or redirection to malicious sites4.
References
2: Understanding Targeted Attacks: What is a Targeted Attack?
3: Types of attacks - Security on the web | MDN
1: What is an on-path attacker? | Cloudflare
4: [What is a Rogue DHCP Server? - Definition from Techopedia]

Basic load balancers make forwarding decisions on IP address and TCP/UDP header values, working at the transport layer of the OSI model.

See explanation below.
Explanation
Screened Subnet devices - Web server, FTP server
Building A devices - SSH server top left, workstations on all 5 on the right, laptop on bottom left DataCenter devices - DNS server.

Explanation
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.