Which three IS-IS design considerations must be considered when connecting two Layer 3 switches directly using a 10 GBASE C T cabling and forming IS-IS neighbor adjacency? (Choose three)

Which three IS-IS design considerations must be considered when connecting two Layer 3 switches directly using a 10 GBASE C T cabling and forming IS-IS neighbor adjacency? (Choose three)
A . The area, levels, and interface MTU parameters must match, and system MTU must be unique foe two IS-IS routers to become adjacent
B . A DlS is elected between the IS-IS neighbors and the elected DIS is pre-empted if a router with a higher system ID is connected
C . Faster IS-IS hello and dead timers increase bandwidth and CPU use, and may cause instability
D . A DIS is elected between the IS-IS neighbors and the elected DIS is preempted if a router with a tower system ID is connected
E . The hello and dead timers must match for two IS-IS routers to become adjacent
F . The default IS-IS network type is port-to-point so a DIS is not elected
G . The IS-IS hello and dead timers should be tuned to detect failures as quickly as possible

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Answer: B,C,E