Using a value of ____ for the mode argument of the fopen() function opens the specified file for reading and writing and places the file pointer at the end of the file.

The ____ compositor allows any of the child elements to appear in any order in the instance document.

A. target B. sequence C. all D. choice

A network engineer is configuring a network to be able to relay IPv6 packets. The network only supports IPv4 and does not have dual-stack support. Which of the following can be used to successfully relay IPv6 packets over this network?

a. IPv6 tunneling b. OSPFv3 c. Dual-stack Lite d. GREv3 tunneling