Refer to the exhibit. A network administrator has configured R1 as shown. When the administrator checks the status of the serial interface, the interface is shown as being administratively down. What additional command must be entered on the serial interface of R1 to bring the interface up?
In order for packets to be sent to a remote destination, what three pieces of information must be configured on a host? (Choose three.)
a. Hostname
b. IP address
c. Subnet mask
d. Default gateway
e. DNS server address
f. DHCP server address