Which of the following statements are correct about TTL field in IP packet? (Choose two)

Which of the following statements are correct about TTL field in IP packet? (Choose two)

A. The maximum value of TTL is 65535. B. Normally, it's impossible for a router to receive a packet whose TTL is zero. C. The main purpose of TTL is to prevent IP packets from circulating endlessly in a network which can consume a lot of bandwidth. D. TTL value will be decremented as a packet is passed through the network devices such as hub, LAN switch and router.