Which Cisco Internetwork Operating System (IOS) command is used to assign a router a name for identification?

A.
description

B.
banner motd

C.
hostname

D.
banner exec

Explanation:
The hostname command is used to assign the router a name for identification. This command is a global configuration mode command. The syntax of the
command is as follows:
Router(config)# hostname [name]
The name parameter of the command specifies the new host name for the router.
The description command is incorrect because this command is used to set a description for an interface. The description command is an interface configuration
mode command.
The banner motd command is used to specify a message of the day (MOTD) banner to users logging into the router. This is a global configuration mode command,
but it does not assign a name to the router for identification.
The banner exec command enables a banner message to be displayed when an EXEC process is created; for example, if a line is activated or an incoming
connection is made to a telnet line.
Objective:
Network Fundamentals
Sub-Objective:
Select the appropriate cabling type based on implementation requirements

https://www.cisco.com/c/en/us/td/docs/ios/fundamentals/command/reference/cf_book/cf_f1.html#wp1015617