The typical firewall consists of two packet filters and a(an)(68).A．routerB．bridgeC．applicationD．server
The typical firewall consists of two packet filters and a(an)(68).
A．router
B．bridge
C．application
D．server
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在数据封装中PDU的正确顺序是()。 A.data，packet，frame，segment，BitB.data，packet，segment，frame，BitC.data，segment，frame，packet，BitD.data，segment，packet，frame，Bit
Packet-switching wireless networks are preferable(66)when transmissions are(67)bemuse of the way charges are(68)per packet. Circuit-switched networks are preferable for transferring large files or for other lengthy transmissions because customers are(69)for the(70)of time they use the network.A．toB．forC．thanD．only
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