Which statement about upgrading a cisco IOS device with TFTP server?
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A. B. C. D.D
To upgrade a Cisco IOS device using a TFTP server, the following steps are typically required:
Install a TFTP server on a computer that is connected to the same network as the Cisco IOS device.
Obtain the updated IOS image from Cisco's website or other reputable source.
Copy the updated IOS image to the TFTP server.
Configure the Cisco IOS device to download the updated IOS image from the TFTP server. This can typically be done using the "copy tftp" command in the IOS command-line interface (CLI).
When performing this upgrade, the following statements apply:
A. The operation is performed in active mode: This statement is not accurate because there is no "active" or "passive" mode involved in the TFTP transfer. The TFTP server listens for requests on port 69, and the Cisco IOS device sends a request for the file it needs. The transfer then takes place over UDP, which is connectionless and does not have an active or passive mode.
B. The operation is performed in unencrypted format: This statement is accurate because TFTP transfers are unencrypted by default. This means that anyone on the same network as the TFTP server can potentially intercept the transfer and view the contents of the IOS image.
C. The operation is performed in passive mode: As mentioned earlier, there is no active or passive mode involved in the TFTP transfer, so this statement is not accurate.
D. The Cisco IOS device must be on the same LAN as the TFTP server: This statement is accurate because TFTP is not routable, meaning that it cannot traverse across different networks. Therefore, the Cisco IOS device and the TFTP server must be on the same local area network (LAN) for the transfer to take place.