单项选择题

Maintenance activities do not include（）

A．making enhancements to software products
B．developing a new software product
C．correcting problems
D．adapting products to new environments

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热门试题

单项选择题When a bridge transmits an Ethernet frame, the Ethernet frame has （）.

A．the broadcast address for the its source address
B．the bridge's LAN address for its destination address
C．the bridge's LAN address for its source address
D．none of the above

单项选择题A 10BaseT Ethernet LAN has（）．

A．a star topology
B．a ring topology
C．a bus topology
D．a linear topology