How will a router that is configured with a classless routing protocol determine the subnet mask that should be assigned to routes that are learned from neighboring classless routers?

How will a router that is configured with a classless routing protocol determine the subnet mask that should be assigned to routes that are learned from neighboring classless routers?

• The subnet mask that is included in the routing updates will be used.
• The subnet mask of the interface that receives the update will be used.
• The subnet mask that is specified in the network command will be used.
• The class of the network in the update will determine the subnet mask that is used

Exam with this question: CCNA Exploration 2: ERouting Final Exam