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Q:

Which layer ensures the trustworthly transmission of data across a physical link and is primarily concerned with physical addressing, line discipline, network topology, error notification, ordered delivery of frames, and flow control?

Answer

PDUs at the data link layer are called frames and provide physical addressing, plus other options to place packets on the network medium.

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Subject: CCNA

Q:

Which layer chooses and determines the availability of communicating partners along with the resources necessary to make the connection, coordinates partnering applications, and forms a consensus on procedures for controlling data integrity and error recovery?

Answer

The application layer is responsible for finding the network resources broadcast from a server and adding flow control and error control (if the application developer chooses)

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Subject: CCNA

Q:

Which layer defines how data is formatted , presented, encoded, and converted for use on the network?

Answer

The presentation layer makes sure that data is in a readable format for the Application layer.

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Subject: CCNA

Q:

Which layer is responsible for keeping the data from different applications seperate on the network?

Answer

The session layer creates sessions between different host's applications.

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Subject: CCNA

Q:

Which layer is used for reliable communication between end nodes over the network and provides mechanisms for establishing , maintaining , and terminating virtual circuits; transport - fault detection and recovery; and controlling the flow of information?

Answer

The Transport layer uses virtual circuits to create a reliable connection between two hosts.

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Subject: CCNA

Q:

At which layer is routing implemented , enabling connections and path selection between two end systems?

Answer

The Network layer provides routing through an internetwork and logical addressing.

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Subject: CCNA

Q:

Which layer is responsible for converting data packets from the Data Link layer into electrical signals?

Answer

The physical layer takes frames from the Data Link layer and encodes the 1s and 0s into a digital signal for transmission on the network medium.

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Subject: CCNA

Q:

What is the purpose of flow control?

A) To ensure that data is retransmitted if an acknowledgment is not received B) To reassemble segments in the correct order at the destination device
C) To provide a means for the receiver to govern the amount of data sent by the sender D) To regulate the size of each segment
 
Answer & Explanation Answer: C) To provide a means for the receiver to govern the amount of data sent by the sender

Explanation:

Flow control allows the receiving device to control  the transmitter so the receiving device's buffer does not overflow.

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Filed Under: CCNA