What type of connections are established for secure communications between offices?

VPN tunnels are the correct choice for establishing secure communications between offices. VPN stands for Virtual Private Network, which creates a secure and encrypted connection over a less secure network, such as the internet. This encryption protects data from being intercepted during transmission, making it an ideal solution for businesses that need to connect multiple offices securely.

When using VPN tunnels, organizations can ensure that sensitive information transmitted between different locations remains confidential and secure from unauthorized access. This capability is crucial for establishing a secure environment for remote employees or branch offices that need to communicate and share data over the internet.

While WiFi connections can facilitate internet access, they do not inherently provide the level of security that VPN tunnels offer. LAN cables are primarily used for local area network connections within a single location and do not connect offices over the internet. Bluetooth links are suitable for short-range communication between devices but are not designed for secure communication across wide distances or for permanent office-to-office connectivity.