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When a host transmits data across a network to another host, which process does the data go through?（）
- A、standardization
- B、conversion
- C、encapsulation
- D、synchronization
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多选题Which of the following correctly describe steps in the OSI data encapsulation process?（）ATransport layer divides a data stream into segments adds reliability flow control informationBData link layer adds physical source destination address an FCS to the segmentCPackets are created when the network layer encapsulate a frame with source destination host address protocol related control informationDPackets are created when the network layers adds layers 3 address control information to a segmentEThe presentation layer translated bits into bits into voltages for transmission across the physical link
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多选题Which two statements are correct about the signaling methods that are utilized for transmitting voice？ （）AChannel-associated signaling transmits control signals in band and therefore reduces the bandwidth available for the voice data stream.BChannel-associated signaling utilizes a separate TDM channel for transmitting control signals.CCommon channel signaling transmits control signals in band and therefore reduces the bandwidth available for the voice data stream.DCommon channel signaling uses one of the TDM channels to transmit control information reducing the number of channels available for voice.EISDN BRIs implement channel-associated signaling.
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单选题A host is attempting to send data to another host on a different network. What is the first action that the sending host will take?（）A
Drop the data.B
Send the data frames to the default gateway.C
Create an ARP request to get a MAC address for the receiving host.D
Send a TCP SYN and wait for the SYN ACK with the IP address of the receiving host.
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多选题Which of the following correctly describe steps in the OSI data encapsulation process?（）AThe transport layer divides a data stream into segments and may add reliability and flow control information.BThe data link layer adds physical source and destination addresses and an FCS to the segment.CPackets are created when the network layer encapsulates a frame with source and destination host addresses and protocol-related control information.DPackets are created when the network layer adds Layer 3 addresses and control information to a segment.EThe presentation layer translates bits into voltages for transmission across the physical link.
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多选题Which of the following statements regarding ISDN are correct?（）AEach ISDN B channel has transmission speeds of up to 64 kbps.BThe ISDN B channel can carry video, voice or data.CThe ISDN B channel transmission rate varies depending on the service used.DThe ISDN D channel transmits control information.EThe ISDN B channels can be configured with different subnets and encapsulation types when dialer profiles are configured.
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