Transport agencies include（）

A.air freight forwarders

B.surface freight forwarders

C.shippers' associations

D.transport brokers

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更多“Transport agencies include（）”相关的问题

第1题

Transport agencies include air and surface（)．A．freight forwardersB．shipper’S associationsC

Transport agencies include air and surface()．

A．freight forwarders

B．shipper’S associations

C．insuance brokers

D．transportation brokers

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第2题

When the system upon which a transport entity is running fails and subsequently restarts,

the(66)information of all active connections is lost. The affected connections become half-open, as the side that did not fail does not yet realize the problem.The still active side of a half-open connection can close the connection using a(67)timer. This timer measures the time the transport machine will continue to await an(68)of a transmitted segment after the segment has been retransmitted the maximum number of times. When the timer(69), the transport entity assumes that either the other transport entity or the intervening network has failed. As a result, the timer closes the connection, and signals an abnormal close to the TS user.In the event that a transport entity fails and quickly restarts, half-open connections can be terminated more quickly by the use of the RST segment. The failed side returns an RST i to every segment i that it receives. When the RST i reaches the other side, it must be checked for validity based on the(70)number i, as the RST could be in response to an old segment. If the reset is valid, the transport entity performs an abnormal termination.

A．data

B．state

C．signal

D．control

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第3题

when the system upon which a transport entity is running fails and subsequently reatarts，t

he（）information of all active connections is lost.the affected connections become half-open，as the side that did not fail does not yet realize the promble. The still active side of a half-open connections using a（）timer.this timer measures the time transport machine will continue to await an（）of a transmitted segment after the segment has been retransmitted the maximum number of times.when the timer（），the transport entity assumes that either the other transport entity or the intervening network has failed.as a result，the timer closes the connection，and signals an abnormal close to the TS user. In the event that a transport entity fails and quickly restart，half-open connections can be teminated more quickly by the use of the RST segment.the failed side returns an RST I to every segment I that it receives.when the RST I reaches the other side，it must be checked for validity dased on the （）number I，as the RST could be in response to an old segment .if the reset is valid，the transport entity performs an abnormal termination.

A.data B.state C.signal D.control A.give-up B.abandon C.quit D.connection A.reset B.acknowledgment C.sequence D.synchroizer A.stops B.restarts C.expires D.abandons A.sequence B.acknowledgment C.connection D.message

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第4题

The network layer provides services to the transport layer．It can be based on either （1)．I

The network layer provides services to the transport layer．It can be based on either (1)．In both cases，its main job is (2) packets from the source to the destination．

In network layer，subnets can easily become congested，increasing the delay and (3).

for packets．Network designers attempt to avoid congestion by proper design．Techniques include (4) policy，caching，flowcontrol，and more．

The next step beyond just dealing with congestion is to actually try to achieve a promised quality of service．The methods that can be used for this include buffering at the client，traffic shaping，resource (5)，and admission control．Approaches that have been designed for good quality of service include integrated services(including RSVP) ，differentiated services， and MPLS．

(1)

A．virtual circuits or datagrams

B．TCP or UDP

C．TCP or IP

D．IP or ARP

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第5题

Of the various ______ agencies in America, the CIA is the most prominent.

A.secret

B.intelligence

C.information

D.espionage