施工过程质量控制是指（)的投入与产出过程的质量控制。A．工程产品B．施工作业技术活动C．材料和设

A．Router

B．Bridge

C．Hub

D．Switch

A. Hub

B. Bridge

C. Switch

D. Router

E. Repeaters

F. None of the above

A．Layer 1

B．Layer 3

C．Layer 4

D．Layer 5

A．Laye r2

B．Layer 3

C．Layer 5

D．Layer 7

A. end-to-end communications path

B. hosts on the same Layer 2 broadcast domain

C. hosts on the same Layer 3 broadcast domain

D. routing information on participating Layer 3 devices

A.to uniquely identify devices at Layer 2

B.to allow communication with devices on a different network

C.to differentiate a Layer 2 frame from a Layer 3 packet

D.to establish a priority system to determine which device gets to transmit first

E.to allow communication between different devices on the same network

F.to allow detection of a remote device when its physical address is unknown

A．A.6100 serves as devices at convergence layer.

B．B.9000 is used at core layer.

C．C.6200 is used at access layer and convergence layer.

D．D.6300 is used at convergence layer.

A. Layer 2

B. Layer 3

C. Layer 4

D. Layer 5

E. Layer 6

F. Layer 7

A．Layer 1

B．Layer 5

C．Layer 6

D．Layer 7

A. to uniquely identify devices at Layer 2

B. to allow communication with devices on a different network

C. to differentiate a Layer 2 frame from a Layer 3 packet

D. to establish a priority system to determine which device gets to transmit first

E. to allow communication between different devices on the same network

F. to allow detection of a remote device when its physical address is unknown