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OSI TCP/IP Model Questions

February 6th, 2017 Go to comments

Question 1

Explanation

The transport layer segments data into smaller pieces for transport. Each segment is assigned a sequence number, so that the receiving device can reassemble the data on arrival.

The transport layer also use flow control to maximize the transfer rate while minimizing the requirements to retransmit. For example, in TCP, basic flow control is implemented by acknowledgment by the receiver of the receipt of data; the sender waits for this acknowledgment before sending the next part.

-> A is correct.

The data link layer adds physical source and destination addresses and an Frame Check Sequence (FCS) to the packet (on Layer 3), not segment (on Layer 4) -> B is not correct.

Packets are created when network layer encapsulates a segment (not frame) with source and destination host addresses and protocol-related control information. Notice that the network layer encapsulates messages received from higher layers by placing them into datagrams (also called packets) with a network layer header -> C is not correct.

The Network layer (Layer 3) has two key responsibilities. First, this layer controls the logical addressing of devices. Second, the network layer determines the best path to a particular destination network, and routes the data appropriately.

-> D is correct.

The Physical layer (not presentation layer) translates bits into voltages for transmission across the physical link -> E is not correct.

Question 2

Explanation

The Internet Layer in TCP/IP Model is equivalent to the Network Layer of the OSI Model.

OSI_TCP_IP_Comparison.jpg

Comments (19) Comments
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    February 7th, 2017

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    February 17th, 2017

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    February 20th, 2017

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    February 22nd, 2017

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    February 22nd, 2017

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    February 22nd, 2017

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    February 23rd, 2017

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    March 7th, 2017

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    March 10th, 2017

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  12. test
    March 10th, 2017

    What are three characteristics of the TCP protocol? (Choose three.)

    A.
    It uses a single SYN-ACK message to establish a connection.

    B.
    The connection is established before data is transmitted.

    C.
    It ensures that all data is transmitted and received by the remote device.

    D.
    It supports significantly higher transmission speeds than UDP.

    E.
    It requires applications to determine when data packets must be retransmitted.

    F.
    It uses separate SYN and ACK messages to establish a connection.

  13. test
    March 10th, 2017

    i think B. and C. is correct but i dont know what to choose between A. & F

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