Which command is used to upgrade an IOS on a Cisco router?
A
<i class="networking-code">copy tftp run</i>
B
<i class="networking-code">copy tftp start</i>
C
<i class="networking-code">config net</i>
D
<i class="networking-code">copy tftp flash</i>
Correct Answer: <i class="networking-code">copy tftp flash</i>
The copy tftp flash command places a new file in flash memory, which is the default location for the Cisco IOS in Cisco routers.