What is the purpose of the commands 'ls -a' and 'ls -t' in the context of CNAME (Nslookup)?
1) To list all files and directories, including hidden ones, in alphabetical order
2) To list all files and directories, including hidden ones, in order of their last modification time
3) To list all files and directories, including hidden ones, in order of their creation time
4) To list all files and directories, including hidden ones, in order of their size
