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● Both bus and tree topologies are characterized by the use of multipoint （71）. For the bu

s, all stations attach, through appropriate hardware（72）known as a tap, directly to a linear transmission medium, or bus. Full-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the （73）. A transmission from any station propagates the length of the medium in both directions and can be received by all other （74）.At each end of the bus is a （75) , which absorbs any signal, removing it from the bus.

（71）

A. medium

B. connection

C. token

D. resource

（72）

A. processing

B. switching

C. routing

D. interfacing

（73）

A. tree

B. bus

C. star

D. ring

（74）

A. routers

B. stations

C. servers

D. switches

（75）

A. tap

B. repeater

C. terminator

D. concentrator

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第1题

Both bus and tree topologies are characterized by the use of multipoint（).A.mediumB.connec

Both bus and tree topologies are characterized by the use of multipoint().

A.medium

B.connection

C.token

D.resource

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第2题

Both bus and tree topologies are characterized by the use of multipoint（71)．For the bus，al

Both bus and tree topologies are characterized by the use of multipoint (71) ．For the bus，all stations attach，through appropriate hardware (72) known as a tap，directly to a linear transmission medium，or bus．Full-duplex operation between the station and the tap allows data to be transmitted onto the bus and received from the (73) ．A transmission from any station propagates the length of the medium in both directions and can be received by all other (74) ．At each end of the bus is a (75) ，which absorbs any signal，removing it from the bus．

（71）

A．medium

B．connection

C．token

D．resource

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第3题

As the bus came round the comer, it ran __________ a big tree by the roadside.A. int

As the bus came round the comer, it ran __________ a big tree by the roadside.

A. into

B. on

C. over