Which two are correct when configuring an IP address for a Fast Ethernet interface? (Choose two.)
A.
set interfaces fe-0/0/0 address 10.1.1.1/24
B.
set interfaces fe-0/0/0.0 family inet address 10.1.1.1/24
C.
set interfaces fe-0/0/0.0 address 10.1.1.1/24
D.
set interfaces fe-0/0/0 unit 0 family inet address 10.1.1.1/24
Explanation:
D: The following configuration is sufficient to get a Fast Ethernet interface up and running. By default, IPv4 Fast
Ethernet interfaces use Ethernet version 2 encapsulation.
[edit]
user@host# set interfaces fe-5/2/1 unit 0 family inet address local-address
B: You can alos omit the unit specification, here unit 0, and set the ip address through the command:
set interfaces fe-0/0/0.0 family inet address local-address
http://www.juniper.net/documentation/en_US/junos12.3/topics/example/interfaces-configuring-fastethernet-interfaces.html