Which command is used to upgrade an IOS on a Cisco router?
Answer: Option C
The copy tftp flash command places a new file in flash memory, which is the default location for the Cisco IOS in Cisco routers.
If you wanted to delete the configuration stored in NVRAM, what would you type?
Answer: Option B
The command erase startup-config deletes the configuration stored in NVRAM.
What protocols are used to configure trunking on a switch?
Answer: Option E
VTP is not right because it has nothing to do with trunking except that it sends VLAN information across a trunk link. 802.1Q and ISL are used to configure trunking on a port.
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