Which conditions cause distant vector routing protocols to send routing table updates? (Choose three.)

Which conditions cause distant vector routing protocols to send routing table updates? (Choose three.)

• when the hold down timer expires
• when a change occurs in the network topology
• when the update timer value expires
• when a triggered update is received from another router
• when a packet is received that is destined for an unknown network
• when there have been no routing table changes for 30 minutes

Exam with this question: CCNA 2 Exploration v4.0 Chapter 4 Quiz