A Citrix Administrator is describing the NetScaler/ADC architecture to a new team member. Which statement BEST characterizes how NetScaler processes a load-balanced HTTP request?

1. NetScaler is a full proxy that terminates the client TCP connection on the VIP and opens a separate back-end connection to the selected service
2. NetScaler acts as a Layer 2 bridge that forwards client frames unchanged to the back-end server
3. NetScaler routes packets at Layer 3 only and never inspects HTTP headers
4. NetScaler tunnels the client session to the server using IPsec encapsulation