The disadvantages of Z router using Ethernet MAC address to generate IS-IS process NET address are ________.(Multiple choice)

The disadvantages of Z router using Ethernet MAC address to generate IS-IS process NET address are ________.(Multiple choice)
A . The MAC address is the same length as the Stem-ID in NET, which is easy to confuse
B. MAC address is not global and inconvenient to manage
C. There is no necessary relationship between MAC address and network planning, and MAC address is not easy to remember

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Answer: BC