单选题A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port（）。AThis is a 10 Mb/s switch portBThis is a 100 Mb/s switch portCThis is an Ethernet port operating at half duplexDThis is an Ethernet port operating at full duplexEThis is a port on a network interface card in a PC
单选题
A network interface port has collision detection and carrier sensing enabled on a shared twisted pair network. From this statement, what is known about the network interface port（）。
A
This is a 10 Mb/s switch port
B
This is a 100 Mb/s switch port
C
This is an Ethernet port operating at half duplex
D
This is an Ethernet port operating at full duplex
E
This is a port on a network interface card in a PC
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