Final answer:
The question deals with a router access list controlling IP phone configuration file transfers to a TFTP server. Without the actual content of the access list, the answer could vary, but the intended function may be to allow transfers from a specific host to a TFTP server.
Step-by-step explanation:
The question pertains to an access list on a router (R1) in a networking environment that mentions IP phone configuration file transfers to a TFTP server. Without the actual access list provided, we cannot definitively choose the correct option. However, based on the context, we can deduce that the access list is likely meant to:
Permit file transfers to any TFTP server if it is from a specific host with IP phone configurations.
Deny IP phone configuration file transfers to TFTP servers if not from the specified host or under certain conditions.
Allow IP phone configuration file transfers specifically to the defined TFTP server from a particular host.
Blocks all network traffic which is unlikely unless the rule comes after specific allows in the access list.
For a precise answer, we would need the specific lines of the access list to assess which of these options is true.