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Saturday, October 20, 2012


Networking Basics Interview Questions - Set 02

  • Saturday, October 20, 2012
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  • Networking Basics Interview Questions
    Networking Basics Interview Questions
    Following are the Networking Basics Interview Questions presenting here are collected from various students, professors, websites.

    21. Define the terms Unicasting, Multiccasting and Broadcasting?

    If the message is sent from a source to a single destination node, it is called Unicasting.
    If the message is sent to some subset of other nodes, it is called Multicasting.
    If the message is sent to all the m nodes in the network it is called Broadcasting.

    22. What is Multiplexing?

    Multiplexing is the set of techniques that allows the simultaneous transmission of multiple signals across a single data link.

    23. Name the categories of Multiplexing?

    a. Frequency Division Multiplexing (FDM)
    b. Time Division Multiplexing (TDM)
       i. Synchronous TDM
       ii. ASynchronous TDM Or Statistical TDM.
    c. Wave Division Multiplexing (WDM)

    24. What is FDM?

    FDM is an analog technique that can be applied when the bandwidth of a link is greater than the combined bandwidths of the signals to be transmitted.

    25. What is WDM?

    WDM is conceptually the same as FDM, except that the multiplexing and demultiplexing involve light signals transmitted through fiber optics channel.

    26. What is TDM?

    TDM is a digital process that can be applied when the data rate capacity of the transmission medium is greater than the data rate required by the sending and receiving devices.

    27. What is Synchronous TDM?

    In STDM, the multiplexer allocates exactly the same time slot to each device at all times, whether or not a device has anything to transmit.

    28. List the layers of OSI

    a. Physical Layer
    b. Data Link Layer
    c. Network Layer
    d. Transport Layer
    e. Session Layer
    f. Presentation Layer
    g. Application Layer

    29. Which layers are network support layers?

    a. Physical Layer
    b. Data link Layer and
    c. Network Layers

    30. Which layers are user support layers?

    a. Session Layer
    b. Presentation Layer and
    c. Application Layer

    31. Which layer links the network support layers and user support layers?

    The Transport layer links the network support layers and user support layers.

    32. What are the concerns of the Physical Layer?

    Physical layer coordinates the functions required to transmit a bit stream over a physical medium.
    a. Physical characteristics of interfaces and media
    b. Representation of bits
    c. Data rate
    d. Synchronization of bits
    e. Line configuration
    f. Physical topology
    g. Transmission mode

    33. What are the responsibilities of Data Link Layer?

    The Data Link Layer transforms the physical layer, a raw transmission facility, to a reliable link and is responsible for node-node delivery.
    a. Framing
    b. Physical Addressing
    c. Flow Control
    d. Error Control
    e. Access Control

    34. What are the responsibilities of Network Layer?

    The Network Layer is responsible for the source-to-destination delivery of packet possibly across multiple networks (links).
    a. Logical Addressing
    b. Routing

    35. What are the responsibilities of Transport Layer?

    The Transport Layer is responsible for source-to-destination delivery of the entire message.
    a. Service-point Addressing
    b. Segmentation and reassembly
    c. Connection Control
    d. Flow Control
    e. Error Control

    36. What are the responsibilities of Session Layer?

    The Session layer is the network dialog Controller. It establishes, maintains and synchronizes the interaction between the communicating systems.
    a. Dialog control
    b. Synchronization

    37. What are the responsibilities of Presentation Layer?

    The Presentation layer is concerned with the syntax and semantics of the information exchanged between two systems.
    a. Translation
    b. Encryption
    c. Compression

    38. What are the responsibilities of Application Layer?

    The Application Layer enables the user, whether human or software, to access the network. It provides user interfaces and support for services such as e-mail, shared database management and other types of distributed information services.
    a. Network virtual Terminal
    b. File transfer, access and Management (FTAM)
    c. Mail services
    d. Directory Services

    39. What are the two classes of hardware building blocks?

    Nodes and Links.

    40. What are the different link types used to build a computer network?

    a. Cables
    b. Leased Lines
    c. Last-Mile Links
    d. Wireless Links

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