Top CCNA Job Interview Questions and Answers - For Fresher & Experienced

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Top CCNA Job Interview Questions and Answers -
For Fresher Experienced

• Hub4Tech

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Question 1 What is Routing?

• Answer
• Routing is the process of finding a path on which
  data can pass from source to destination. Routing
  is done by a device called routers, which are
  network layer devices.

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Question 2 What is routing on a network?

• Answer
• This might seem like a basic question, but the
  interviewer might ask it just to see if you know
  the basics. Routing is done by routers. Routers
  have a routing table that send network traffic
  from one location to another location or segment
  on the network. Routers reduce network traffic
  compared to regular hubs. When a user sends
  network traffic across the network, a hub
  broadcasts to all segments of the network. With a
  router, the device analyzes the TCP/IP packet,
  sees the destination location, and then uses its
  lookup table to route the packet to the right
  network segment and destination. Switches also
  route traffic in a similar fashion.

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Question 3What is 100BaseFX?

• Answer
• This is Ethernet that makes use of fiber optic
  cable as the main transmission medium. The 100
  stands for 100Mbps, which is the data speed.

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Question 4 Is it better to add a network segment
to a growing network or continue to use the same
subnet mask?

• Answer
• Growing networks start to suffer from network
  congestion. When you segment the network, routers
  are better able to route traffic to specific
  parts of the network without broadcasting signals
  across only one segment. When you reduce
  broadcasting, you lower congestion, which speeds
  up your network. With a growing large network,
  its better to start segmenting the network and
  create subnet masks for different segments.

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Question What is network congestion?

• Answer
• With all of the streaming applications and peer
  to peer software, network congestion is common on
  a large network. Network congestion occurs when
  too many people are trying to use limited
  bandwidth. Most companies have a limited amount
  of bandwidth they can use before they pay extra,
  which is why companies limit bandwidth by
  blocking streaming and peer to peer applications
  using firewalls.

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Question 6Differentiate User Mode from
Privileged Mode

• Answer
• User Mode is used for regular task when using a
  CISCO router, such as to view system information,
  connecting to remote devices, and checking the
  status of the router. On the other hand,
  privileged mode includes all options that are
  available for User Mode, plus more. You can use
  this mode in order to make configurations on the
  router, including making tests and debugging.

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Question 7 What are data packets?

• Answer
• Data packets are the encapsulation units that
  transmit information across a network. A data
  packet contains the senders information, the
  recipients information, and the data contained.
  It also contains the numeric identification
  number that defines the order and packet number.
  When you send data across the network, that
  information is segmented into data packets. The
  recipient then puts these packets together to be
  able to read the information. Basically, data
  packets contain the information and routing
  configurations for your transferred message.

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Question 8What is the key advantage of using
switches?

• Answer
• When a switch receives a signal, it creates a
  frame out of the bits that was extracted from
  that signal. With this process, it gains access
  and reads the destination address, after which it
  forwards that frame to the appropriate port. This
  is a very efficient means of data transmission,
  instead of broadcasting it on all ports.

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