Compared with a three-layer network architecture, a two-layer network architecture has simple topology and high data forwarding efficiency. The network architecture will transform to the two-layer architecture, and the three-layer network architecture will be gradually phased out.

• A.TRUE
• B.FALSE

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Which of the following authorization items is not required for risky operations?

• A.Administrative authorization
• B.Management authorization
• C.Technology authorization
• D.Customer authorization

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Which of the following formulas is used to calculate availability?

• A.MTBF/(MTBF + MTTR) x 100%
• B.MTTR/MTBF x 100%
• C.(MTBF + MTTR)/MTBF x 100%
• D.MTBF/MTTR x 100%

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Which of the following devices forwards data based on MAC addresses in data frames?

• A.Firewall
• B.Network bridge
• C.Router
• D.Hub

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Which of the following work is not prepared before the migration?

• A.Hardware test
• B.Software test
• C.Tools
• D.Expenses

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