Cisco Certified Network Professional Practice Test

The primary function of an Internet Gateway is to aggregate internet connections. This means that it serves as the point of access for internal network clients to connect to the broader internet. Internet Gateways act as an intermediary device, managing and directing traffic between the local network and external networks, which is crucial for maintaining efficient communication and connectivity. In a network architecture context, Internet Gateways can combine and manage multiple internet connections, thereby allowing for load balancing, redundancy, and enhanced bandwidth capacity. This ensures that users and devices on the local network can access the internet seamlessly and reliably. The other options, while they represent important network functions, do not pertain to the primary role of an Internet Gateway. For instance, aggregating email services refers to managing email traffic and accounts, serving as a DNS resolver relates to translating domain names into IP addresses, and providing file server functionality pertains to storing and managing files for access over the network. None of these tasks are the primary purpose of an Internet Gateway.