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    CCNA Interview questions

    1. Define the term networking.

      The term “networking” refers to the process of connecting to and operating on a network. It is a method of establishing and utilizing wired or wireless networks for the exchange of data and other forms of electronic communication.

    2. What is a latency?

      It is the length of time it takes for a local network to transfer a frame from the time it collects it to the period it transmits it out to another broadcast domain.

    3. Differentiate between LAN, MAN, and WAN?

      The difference between LAN, MAN and WAN are as follows:

      LAN MAN WAN
      It’s a type of local area network in which machines and wireless routers are linked together, usually within such a single room or building. It is a metropolitan area network in which multiple buildings in much the same city are linked together. It is a type of wide area network in which the networks are restricted to a single company or organization but can be accessible by the general public. It connects a number of LANs. The WAN connection is both fast and pricey.
      Example: Ethernet Example: IUB Network Example: Internet
    4. Explain the term bandwidth.

      The data rate of a medium is referred to as bandwidth. It is a unit of measurement for the amount of data that a component can process, and it is expressed in Kbps.

    5. What are the different class and ranges of IP addresses?

      The different class and ranges of IP addresses are as follows:

      Class Range
      A 1-126
      B 127-191
      C 192-223
      D 224-239
      E 240-254
    6. What do you mean by Boot P?

      It is a protocol for booting network-connected diskless computers. It stands for “Boot Program. It is also used by diskless computers to identify their own IP address and also the IP address of the electronic packaging.

    7. Explain the OSI reference model.

      The OSI model describes how data or information are transferred across a network. It is a theoretical structure for comprehending propagation interactions.

    8. What is a Round Trip Time?

      The time it takes for a signal to deliver data plus the time it takes for the recipient of that message to acknowledge it is known as round-trip time.

    9. Why do ‘Service Password Encryption’ is used?

      To convert a plaintext into a credential, it utilizes ‘Service Password Encryption’because the safety is low and it can be easily decoded.

    10. What is the main purpose of subnetting?

      With the use of sub netting, it may divide down a large component into smaller components and assign IP addresses to those platforms without having to change our main system. It makes it easier to make the most of our IP assets.

    11. What is data encapsulation?

      Encapsulation occurs when data is transferred from a source node to a bottom level, with each layer adding some context to the source information. The data that is added is referred to as a heading.

    12. Name the different types of cables that are used in routing.

      The three different types of cables that are used:

      • Straight cable
      • Cross cable
      • Rollover cable
    13. What do you understand by logical topology?

      The system where number of packets are transmitted from source to destination, that can also observeis known as logical topology.

    14. What is the IEEE standard for wireless networking?

      The IEEE standard for wireless networking is IEEE 802.11.

    15. Name the two types of IP addresses which are available.

      There are two types of IP addresses are as follows: IPv4 and IPv6

      • IPv4- 32-bit address
      • IPv6-128-bit address
    16. What is the subnet mask of 192.168.100.1/28?

      The subnet mask of 192.168.100.1/28 is 255.255.255.240.

    17. Name the router command which is used to enable IPv6?

      The router command which is used to enable IPv6 is unicast-routing.

    18. Explain the role of the LLC sublayer?

      Logical Link Control is the name of the LLC sublayer. It can give a programmer with payment options. One way is to use stop/start messages to offer flow to the Protocol stack. Error repair is another service that the LLC can give.

    19. Why is VLAN used?

      It’s a Virtual LAN network that allows you to create multiple domains on a central controller.

    20. Describe the term autonomous system.

      It might be a wireless unit or a collection of networks controlled by a single directive. It’s known as an Autonomous System Number and it’s specified by a unique identifier or code (ASN). It is also referred to as a network packet.

    21. What is a DHCP scope?

      The Dynamic Host Configuration Protocol (DHCP) is a technology that assigns an Internet address to a user dynamically.

    22. Explain the role of the Data Link?

      The Data Link layer’s job is to ensure that communications are delivered to the correct device. Molding is also another role of this level.

    23. Describe the flooding.

      It is the transmission of a package from any base connected to the router to every other hub linked to the switching save the hub from where the bundles originated. It is also used for rapidly disseminating information updates to each hub in a wide network.

    24. What is a Multi-homed Host?

      A multi-homed hub is defined as a hub that connects multiple systems. A PC, for example, can be linked to both a home network and a VPN. These servers can be distributed across multiple areas, one for each platform.

    25. What do you mean by ISATAP?

      ISATAP stand for Intra-site Automatic Tunnel Addressing Protocol. Within a location that utilizes IPv4, virtual connections are used to link IPv6 locations.

    26. Define the term Redundancy.

      It is a technique for ensuring that alternative paths are available in the event of a networking or path breakdown.

    27. When does network congestion occur?

      When more and more users try to share the same capacity, congestion occurs arises. This is particularly true in existing databases that do not segregate their connections.

    28. Explain the command “show version” does?

      It shows the IOS version, the amount of RAM available and the processing speed.

    29. What is a BGP?

      BGP stands for Border Gateway Protocol. It is an external entrance protocol that connects at least two different distinct frames. It is widely used to direct Internet traffic. It can also be used for internal AS, but we have better internal network standards. It has a 20-course administration split for outer programs and 200-course organizational isolation for interior programs.

    30. What is DOS?

      DOS stands for Disk Operating System. It is a computer program that runs from a hard disc drive. The phrase can also refer to a collection of circular work area, the most common of which is MSDOS (Microsoft Disk Operating System).

     

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