Final answer:
The correct statement about Generic Routing Encapsulation (GRE) is that it creates non-secure tunnels between remote sites. GRE does not provide encryption or error correction, and it is not related to IEEE 802.1Q which is a VLAN tagging protocol.
Step-by-step explanation:
The correct answer regarding Generic Routing Encapsulation (GRE) is: b. It creates non-secure tunnels between remote sites. GRE is a protocol that encapsulates packets in order to route other protocols over IP networks. GRE tunnels are widely used to transport traffic from one network to another without regard to the protocol being used. They are a simple and effective way to enable communication between sites, but it's important to note that GRE itself does not provide any form of encryption or confidentiality.
Other options such as a. It provides encryption to keep VPN traffic confidential are incorrect. While GRE can be used in conjunction with VPN technologies, GRE alone does not encrypt traffic. Instead, the actual encryption would be handled by protocols like IPsec. Option c. It transports multiple Layer 2 protocols is partly correct as GRE can encapsulate a wide variety of network layer protocols, but the question's wording implies that GRE is only meant for Layer 2 protocols which is not true. GRE is a Layer 3 tunneling protocol. Option d. It autocorrect packets that have minor errors in it is incorrect as GRE does not have the capability to fix errors in packets. Lastly, option e. It uses IEEE 802.1Q in encapsulating packets is incorrect since IEEE 802.1Q is a VLAN tagging protocol and not related to the encapsulation method used by GRE.