Referring to the exhibit, what does the number inside the square brackets represent?

In your configuration, an interface contains multiple IP addresses belonging to the same subnet. You want to identify the IP address to use for packets sent to hosts on the same subnet. Which parameter would you use to accomplish this task?

Which next-hop interface will be used to reach the 10.21.14.16 destination as shown in the exhibit?

Which command will show files stored in the /var/home/lab directory?

***Exhibit is Missing***
What does the number inside the square bracket represent?