2
319views
Explain Network Sniffers and how to Network Sniffers?
1 Answer
1
2views

Solution

  • Sniffers monitor and record raw data that passes through, over, or by a physical network interface.

  • Network sniffer is tool that can help you locate network problems by allowing you to capture and view the packet level data on your network.

    • Uses of network Sniffers:
    • Capturing packets
    • Recording and analyzing traffic
    • Decrypting packets and displaying in clear text
    • Converting data to readable format
    • Showing relevant information like IP protocol, host or server name and so on
    • Catching password, which is the main reason for most illegal uses of sniffing tool
    • Capturing special and private information of transactions like username, credit ID, account, and password.
  • They operate from a core part of a system’s networking stack, close to the hardware drivers that translate electrical impulses from a wired (or wireless) connection into packets.

  • For example, a sniffer might tell an Ethernet interface to dump all traffic it sees rather than just watch for traffic addressed to the device’s address.

  • Network interfaces are supposed to have a unique identifier tied to the device’s hardware.

  • This identifier is the Media Access Control (MAC) address assigned to every interface.

  • A device’s IP address may change depending on what network it’s connected to.

  • For example, a laptop might have IP address 10.0.1.12 on a home network, 10.10.33.19 at a coffee shop, and 192.168.17.33 at work.

  • Its MAC address remains the same across each network because the hardware hasn’t changed.

  • Devices use the MAC address to negotiate data link layer connections.

  • These are the connections that devices use to transfer higher-level protocols like TCP/IP. In order to join a network, a device broadcasts its MAC address, indicating that it wishes to communicate with someoneThey operate from a core part of a system’s networking stack, close to the hardware drivers that translate electrical impulses from a wired (or wireless) connection into packets.

Please log in to add an answer.