Final answer:
A default Cisco 1941 router includes two integrated 10/100/1000 Ethernet ports and supports modularity with EHWIC slots for expanded functionality such as voice over IP and dynamic multipoint VPN.
Step-by-step explanation:
The student is asking about a hardware feature of a Cisco 1941 router with the default hardware configuration. The Cisco 1941 router, in its default configuration, includes two integrated 10/100/1000 Ethernet ports for WAN connections, and it supports the Enhanced High-Speed WAN Interface Card (EHWIC) slots which enable hardware customization.
This modularity allows network administrators to expand the router's capabilities by adding various interface cards, which can offer additional features like voice over IP (VoIP), firewalls, or wireless services. The 1941 model also supports hardware-accelerated data encryption for secure data transmission and offers dynamic multipoint VPN (DMVPN) for creating scalable and secure VPN networks.