Book Image

CEH v10 Certified Ethical Hacker Study Guide

By : Ric Messier
Book Image

CEH v10 Certified Ethical Hacker Study Guide

By: Ric Messier

Overview of this book

As protecting information becomes a rapidly growing concern for today’s businesses, certifications in IT security have become highly desirable, even as the number of certifications has grown. Now you can set yourself apart with the Certified Ethical Hacker (CEH v10) certification. The CEH v10 Certified Ethical Hacker Study Guide offers a comprehensive overview of the CEH certification requirements using concise and easy-to-follow instructions. Chapters are organized by exam objective, with a handy section that maps each objective to its corresponding chapter, so you can keep a track of your progress. The text provides thorough coverage of all topics, along with challenging chapter review questions and Exam Essentials, a key feature that identifies critical study areas. Subjects include intrusion detection, DDoS attacks, buffer overflows, virus creation, and more. This study guide goes beyond test prep, providing practical hands-on exercises to reinforce vital skills and real-world scenarios that put what you’ve learned into the context of actual job roles. By the end of the book, you’ll have all the information and knowledge you need to pass this test with flying colors
Table of Contents (23 chapters)
Free Chapter
1
Cover
2
About the Author
3
Introduction
4
Assessment Test
5
Answers to Assessment Test
20
Index
21
Comprehensive Online Learning Environment
22
End User License Agreement

Internet Control Message Protocol

The ICMP is a special case when it comes to protocols, in that it doesn’t carry user data. Instead, it works with other protocols to provide error and control messaging. When something unexpected happens on the network, devices will generate ICMP messages to send back to the originating device to let them know that there was a problem. It does sit on top of IP, because it needs the addressing of IP, but it is considered to be part of the Internet layer as IP is. This also makes it a bit of an unusual protocol, because it sort of sits above the Internet layer but isn’t a Transport layer protocol.

ICMP is defined in RFC 792, which specifies a header of 8 bytes. This consists of the type and code fields, which convey the essential information for ICMP, a checksum field, and then 4 bytes that are labeled “rest of header.” The type and code are each a byte and the checksum is 2 bytes. The rest of the header field contains data...