【多选题】
Which three statements about firewall modes are correct？ （）
A、 A firewall in routed mode has one IP address
B、 A firewall in transparent mode has one IP address
C、 In routed mode， the firewall is considered to be a Layer 2 dew
D、 In routed mode， the firewall is considered to be a Layer 3 device
E、 In transparent mode， the firewall is considered to be a Layer 2 device
F、 In transparent mode， the firewall is considered to be a Layer 3 device
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