Final answer:
To establish a client-to-site VPN, only the server needs a static public IP address.
Step-by-step explanation:
In order to establish a client-to-site VPN, only the server needs a static public IP address. The server acts as the point of connection for clients attempting to access the VPN network. Clients, on the other hand, can have dynamic IP addresses. For example, a company may set up a client-to-site VPN for its employees. The company's VPN server would have a static public IP address, while the employees' devices, which act as clients, can have changing IP addresses.
To establish a client-to-site VPN, only the server hosting the VPN needs a static public IP address. This allows the client devices to reach the server over the internet as the IP address will be constant, making it possible for the clients to establish a secure connection. On the client side, a dynamic IP address can be sufficient because the connection initiates from the client and goes to the server which has the static IP.