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Some important terms - Administration

Do you need to sniff out and spy on network communications in a LAN, WAN or any network configuration? Or have you found yourself in a difficult situation troubleshooting network-related problems inside and outside of your network? Then you need a network analyzer to examine the packets going into and out of certain media. Wireshark can help. Keep reading to find out how.

TABLE OF CONTENTS:
  1. How to Use Wireshark Network Analyzer
  2. Warning: transmitting/receiving sensitive information
  3. Some important terms
  4. Basic installation
By: Codex-M
Rating: starstarstarstarstar / 6
January 05, 2010

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Before we dive deeper into this tutorial, you need to know some very important network-related terms to help you understand how to use Wireshark for network troubleshooting and analysis. There are actually a lot of terms you'll need to know to get the most out of using Wireshark. The terms below, however, are the most important. 

Packets: This is the most basic information representing data (that contains the headers and user information) that is communicated between computers in the modern age. Think of a packet as a block of data. These data are in binary form called "bytes." Digital communication is a communication of binary data (bytes) and in modern communication (such as the Internet), these bytes are grouped into packets.

Think of a packet like a piece of postal mail. The envelope is the "headers" (as it contains the information for where to send the specific packets, and provides a means to authenticate the information, if it is indeed correct). The message inside the envelope is the actual user information to be transmitted or received.

TCP/IP: This stands for Transmission Control Protocol/Internet Protocol. It is a protocol for governing Internet communication. More precisely, these two work together in efficiently transmitting and receiving packets as they travel the digital communication network.

Ethernet: This is a protocol/computer networking technology for local area networks.

Network interface: This is your LAN network card. The function of the network card is to provide a physical (hardware) interface for executing Ethernet communications in a local area network. This is used as a capturing device for Wireshark, where packets are intercepted, displayed and analyzed by the application.



 
 
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