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多項(xiàng)選擇題

Which two statements about MPLS label-switched paths (LSPs) are true? （）

A. LSPs are bidirectional.
B. LSPs are unidirectional.
C. LSPs must follow the IGP's shortest path.
D. LSPs can follow paths other than the IGP's shortest path.

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單項(xiàng)選擇題

Which statement is correct regarding IPv6 addresses?（）

A. An IPv6 address consists of 128 bits separated into eight 16-bit hexadecimal sections.
B. An IPv6 address consists of 64 bits separated into four 16-bit hexadecimal sections.
C. An IPv6 address consists of 128 bits separated into sixteen 8-bit hexadecimal sections.
D. An IPv6 address consists of 64 bits separated into eight 8-bit hexadecimal sections.

單項(xiàng)選擇題

At which layer of the OSI model does error checking occur with IPv6?（）

A. Layer 2
B. Layer 3
C. Layer 4
D. Layer 7