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19.What factors should be considered when modifying OSPF hello interval and dead interval timers on a link? (Choose two.)

The dead interval timer value must be kept at four times the hello interval timer value.
Nonbroadcast networks should have shorter hello intervals than broadcast networks.
These intervals should not be changed unless justified by improved network performance.
All routers exchanging OSPF information over the link must have the same interval timer values.
Any change in these interval timer values will apply to all interfaces on the router.
Dead interval timer values should be made shorter on the designated router to improve network response.