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You're reading from  CompTIA Security+ SY0-701 Certification Guide - Third Edition

Product typeBook
Published inJan 2024
PublisherPackt
ISBN-139781835461532
Edition3rd Edition
Concepts
Cybersecurity
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Author (1)
Ian Neil
Ian Neil
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Ian Neil

Ian Neil is one of the world's top trainers of Security+. He is able to break down information into manageable chunks so that people with no background knowledge can gain the skills required to become certified. He has recently worked for the US Army in Europe and designed a Security+ course that catered to people from all backgrounds (not just IT professionals), with an extremely successful pass rate. He is an MCT, MCSE, A+, Network+, Security+, CASP, and RESILIA practitioner that has worked with high-end training providers over the past 23 years and was one of the first technical trainers to train Microsoft internal staff when they opened their Bucharest Office in 2006.
Read more about Ian Neil

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Packet Captures

Packets are the data that runs up and down our network. By capturing packets, cybersecurity administrators can analyze what is happening on the organization’s network. The tools used can be called packet sniffers or protocol analyzers, common examples of which are Wireshark or the Linux-based Tcpdump. A trace can be conducted by capturing packets, i.e., saving the data in a packet capture (PCAP) form for later analysis. An example of packet capturing is troubleshooting why a user did not receive an IP address from the DHCP server that automates IP address allocation. Allocating an IP address automatically is done by the exchange of four packets. If the cybersecurity administrator only sees the first packet but no second packet, they know that there is a problem with the DHCP server; it may have run out of IP addresses to allocate. Packet capturing can be used for the following tasks:

  • Forensics and incident response: PCAPs can be invaluable for forensic...
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CompTIA Security+ SY0-701 Certification Guide - Third Edition
Published in: Jan 2024Publisher: PacktISBN-13: 9781835461532
© 2024 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Ian Neil

Ian Neil is one of the world's top trainers of Security+. He is able to break down information into manageable chunks so that people with no background knowledge can gain the skills required to become certified. He has recently worked for the US Army in Europe and designed a Security+ course that catered to people from all backgrounds (not just IT professionals), with an extremely successful pass rate. He is an MCT, MCSE, A+, Network+, Security+, CASP, and RESILIA practitioner that has worked with high-end training providers over the past 23 years and was one of the first technical trainers to train Microsoft internal staff when they opened their Bucharest Office in 2006.
Read more about Ian Neil

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