Book Image

Network Protocols for Security Professionals

By : Yoram Orzach, Deepanshu Khanna
5 (1)
Book Image

Network Protocols for Security Professionals

5 (1)
By: Yoram Orzach, Deepanshu Khanna

Overview of this book

With the increased demand for computer systems and the ever-evolving internet, network security now plays an even bigger role in securing IT infrastructures against attacks. Equipped with the knowledge of how to find vulnerabilities and infiltrate organizations through their networks, you’ll be able to think like a hacker and safeguard your organization’s network and networking devices. Network Protocols for Security Professionals will show you how. This comprehensive guide gradually increases in complexity, taking you from the basics to advanced concepts. Starting with the structure of data network protocols, devices, and breaches, you’ll become familiar with attacking tools and scripts that take advantage of these breaches. Once you’ve covered the basics, you’ll learn about attacks that target networks and network devices. Your learning journey will get more exciting as you perform eavesdropping, learn data analysis, and use behavior analysis for network forensics. As you progress, you’ll develop a thorough understanding of network protocols and how to use methods and tools you learned in the previous parts to attack and protect these protocols. By the end of this network security book, you’ll be well versed in network protocol security and security countermeasures to protect network protocols.
Table of Contents (23 chapters)
Part 1: Protecting the Network – Technologies, Protocols, Vulnerabilities, and Tools
Part 2: Network, Network Devices, and Traffic Analysis-Based Attacks
Part 3: Network Protocols – How to Attack and How to Protect

Layer 4 protocols – UDP, TCP, and QUIC

Layer 4, the Transport Layer, provides logical communication between application processes running on different hosts. There are several protocols in layer 4. The most commonly used are the User Datagram Protocol (UDP), which is an unreliable connectionless protocol, and the Transport Control Protocol (TCP), which is a reliable connection-oriented protocol.

Additional protocols include Google's Quick UDP Internet Connections (QUIC), which is a protocol developed by Google to improve web performance over the internet, and Stream Control Transport Protocol (SCTP), which is mostly used in cellular networks.

In this chapter, we will mostly talk about TCP, with a brief look at UDP (there is not much to say about this...) and QUIC.


UDP, which is an unreliable connectionless protocol, is a very simple protocol, as you can see from the UDP header in Figure 2.27:

Figure 2.27 – A UDP header