Cisco Certified Network Associate (CCNA) Practice Exam

Which type of IPv6 tunneling would you use for a simple point-to-point connection?

1. 6to4 tunneling

2. ISATAP tunneling

3. GRE tunneling

4. Teredo tunneling

The correct answer is: 6to4 tunneling

The correct answer for a simple point-to-point connection in IPv6 tunneling is GRE tunneling. GRE (Generic Routing Encapsulation) allows for the encapsulation of a wide variety of protocols, including IPv6, over an IPv4 network. It creates a simple point-to-point connection, which is well-suited for situations where you need to transport IPv6 packets across an existing IPv4 infrastructure. GRE is particularly useful for connecting two specific sites or devices, making it appropriate for simple point-to-point scenarios. While 6to4 tunneling and Teredo tunneling are designed for broader applicability in providing IPv6 connectivity over IPv4 networks, they are not optimized for straightforward point-to-point connections. 6to4 is used for automatic tunneling to connect multiple sites, and Teredo facilitates IPv6 connectivity for hosts behind NAT (Network Address Translation) devices. ISATAP also serves to connect IPv6 nodes across an IPv4 infrastructure but is designed more for integrating IPv6 into an existing IPv4 network as opposed to simple point-to-point communication.