Packet capture-definition and importance

As data continues to flow, the sniffer captures each packet and decodes it as needed to display the values ​​of various fields in the packet. Then analyze the content according to the specifications. This analysis helps determine whether there are abnormal data packets. This helps maintain efficient data transmission.


Packet capture can be used in two ways: legal and illegal. In legal use, sniffing can identify data and transmission errors to ensure effective network communication. However, in an illegal situation, disgruntled employees can use the data to actually “capture” the company’s credit account information. Obviously, this information is not for any sacred purpose. He can use this information to transfer company funds to his personal account!


The main importance of packet sniffer is network inspection. Packet capture is similar to eavesdropping on a telephone line. It detects what is happening in the computer network. The main function of this software is to monitor performance and solve possible problems in the network. In addition, it can use software programs to capture traffic from different parts of the network. Sniffing data from only a part of the network may not have an advantage because it can obtain information from all different parts of the network. This can be done easily using the monitoring port. It intercepts data at different points and sends it to the administrator for decoding and analysis.

Data decoding

Packet capture captures data in an encoded format; in other words, in digital form. Then decode it into a human-readable format. The administrator will then read this information, and the administrator will detect the error. He also deciphered the root cause of the error and resolved it.

Reference equipment

In addition to capturing data, certain packet captures also create traffic. Later it became a reference device and later used as a protocol tester. The tester will generate traffic with the correct protocol for functional testing. Creating erroneous traffic in this way will deliberately introduce errors. This can help administrators test how the sniffer handles actual error conditions.

Analyze network problems

Packet sniffer has multiple functions. However, the main one is to analyze network problems. This helps detect intrusion attempts, detect network abuse, monitor momentum data, debug server communications, filter suspicious content, detect and isolate used systems, collect network statistics, and monitor network usage. The data collected in this way is used as the main data for network monitoring.


Source by Navneet Kumar Srivastav