A network administrator has installed a new router in the Lisbon office and is unable to backup the IOS image of the new router to a TFTP server located in the Gibraltar office. Given the network diagram, identify the source of the problem.
A.
incorrect default gateway of the TFTP server
B.
incorrect subnet mask of the TFTP server
C.
incorrect IP address of the TFTP server
D.
incorrect IP address on E0 of the Gibraltar router
E.
incorrect subnet mask on the Lisbon router
Explanation:
The correct choice is B because the subnet mask of the TFTP SERVER must be /28 bits as per the E0 INTERFACE NETWORK AND MASK ON ROUTER GIBRALTAR which is equal to mask 255.255.255.240
In the network diagram TFTP server which is connected to E0 of Gibraltar is configured with wrong subnet mask 255.255.255.192 i.e. /26 bits this is causing the Lisbon router from backing up the IOS to TFTP.
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