Book Image

CASP+ CompTIA Advanced Security Practitioner Study Guide: Exam CAS-003 - Third Edition

By : Jeff T. Parker, Michael Gregg
Book Image

CASP+ CompTIA Advanced Security Practitioner Study Guide: Exam CAS-003 - Third Edition

By: Jeff T. Parker, Michael Gregg

Overview of this book

The next few years will bring a 45-fold increase in digital data and at least one-third of that data will pass through the cloud. The level of risk to data everywhere is growing in parallel and organizations are in need of qualified data security professionals to safeguard their information. The CASP+ certification validates this in-demand skillset and this book is your ideal resource for passing the exam. CASP+ meets the ISO 17024 standard and is approved by the U.S. Department of Defense to fulfill Directive 8570.01-M requirements. It is also compliant with government regulations under the Federal Information Security Management Act (FISMA). As such, this career-building credential makes you in demand in the marketplace and shows that you are qualified to address enterprise-level security concerns. The CASP+ CompTIA Advanced Security Practitioner Study Guide: Exam CAS-003, Third Edition, is the preparation resource you need to take the next big step for your career and pass with flying colors. This book provides detailed explanations of technical and business concepts that give you the background you need to apply, identify, and implement appropriate security solutions. You’ll solidify your understanding of each objective with end-of-chapter reviews. The book contains hands-on lab exercises and hundreds of practice questions to help you test your knowledge in advance of the exam. By the end of the book, you’ll have the knowledge and the confidence to ace the CASP+ certification exam.
Table of Contents (22 chapters)
Free Chapter
1
Cover
2
Acknowledgments
3
About the Authors
4
Table of Exercises
6
Assessment Test
7
Answers to Assessment Test
18
Index
19
Advert
20
End User License Agreement

Virtual LANs

Virtual LANs (VLANs) are used to segment network traffic. VLANs offer many benefits to an organization because they allow the segmentation of network users and resources that are connected administratively to defined ports on a switch. VLANs reduce network congestion and increase bandwidth. VLANs result in smaller broadcast domains.

VLANs do not need to be isolated to a single switch. They may span many switches throughout an organization. Extending VLANs is done by means of a trunking protocol. A trunking protocol propagates the definition of a VLAN to the entire local area network, whereas an access port accepts traffic for only a single VLAN. Trunking protocols work by encapsulating the Ethernet frame. Two common trunking protocols are the 802.1q standard and Cisco’s proprietary trunking protocol.

Cisco’s Inter-Switch Link (ISL) wraps the Ethernet frame, but it is not a standard used by all vendors. The 802.1q standard places information inside the Ethernet...