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The OSI Reference Model: By Anthony Sequeira; Apr 6, 2018; In this sample chapter from CompTIA Network+ N10-007 Cert Guide, explore the seven layers of the Open Systems Interconnection (OSI) reference model.

An Introduction to Ethical Hacking: By Michael Gregg; Mar 7, 2018; Ethical hacking is a form of legal hacking done with the permission of an organization to help increase its security. In this sample chapter from Certified Ethical Hacker (CEH) Version 9 Cert Guide, 2nd Edition, explore the fundamental principles of the security triad—confidentiality, integrity, and availability.

Network Perimeter Security: By David Prowse; Feb 21, 2018; In this sample chapter from CompTIA Security+ SY0-501 Cert Guide, Academic Edition, 2nd Edition, explore one of the most strategic pieces in your network security design—the firewall.

Configure and Use BIOS/UEFI Tools: By Luke Leighton; Nov 19, 2016; In this sample chapter from CompTIA A+ 220-901 and 220-902 Cert Guide, 4th Edition, author Mark Edward Soper covers; Introduction to BIOS/UEFI, explaining the motherboard’s firmware, known as the BIOS or UEFI. BIOS/UEFI Configuration which demonstrates how to access the BIOS and modify settings; for example, RAM, processor, and video settings. Flash Upgrade BIOS/UEFI where you’ll learn how to upgrade the BIOS through a process known as flashing and Using BIOS/UEFI Diagnostics where you’ll learn about diagnostic features built into many BIOS/UEFI chips.

Exam Profile: CompTIA A+ 220-901 & 220-902: By David L. Prowse; Jun 15, 2016; This article profiles the CompTIA A+ exams (220-901 & 220-902), which test competency in comprehensive vendor-neutral PC hardware and peripherals, mobile device hardware, networking and troubleshooting hardware and network connectivity issues, installing and configuring operating systems including Windows, iOS, Android, Apple OS X and Linux, security, cloud computing fundamentals, operational procedures and communication skills. It describes question forms, trouble spots, hints for exam preparation, and recommendations for additional study resources.

Storage, Part 1: By John A. Davis, Steve Baca, Owen Thomas; May 30, 2016; Learn how to set up and use NFS, iSCSI, FC, and FCoE protocols.

Ranking Certifications (2016 Edition): By Ed Tittel, Mary Kyle; Apr 25, 2016; Employers look for and seek out certified IT professionals, but generally prefer candidates who possess both college degrees and specific certification credentials. Aspiring or active IT professionals can benefit from an informed evaluation of certifications in terms of the time commitment, cost, and other factors involved in earning such a credential vis-a-vis the ultimate financial or career advancement that such an investment can return. In this article, Ed Tittel and Mary Kyle look at one method for rating and ranking IT certifications.

Remote Site Telephony and Branch Redundancy Options: By William Alexander Hannah, Akhil Behl; Mar 5, 2016; Hannah and Behl introduce and explain the various options for deploying remote site telephony solutions.

What's New and What's Changed in the CompTIA A+ 220-902 Exam: By Timothy L. Warner; Feb 18, 2016; Concluding his two-part series on updates to the CompTIA A+ exams, long-time A+ certified professional Timothy Warner points out what you can expect from the new 220-902 exam.

What's New and What's Changed in the CompTIA A+ 220-901 Exam: By Timothy L. Warner; Feb 17, 2016; Timothy Warner, a CompTIA A+ certified professional for over a decade, has seen a lot of changes in the A+ exams over the years. Tune in to learn how CompTIA has improved on its 220-801 exam, giving the new 220-901 replacement a sharper focus on the breadth of today's computing technology.

DHCP Snooping: Basic Concepts and Configuration: By Mason Harris; Feb 9, 2016; Mason Harris, CCIE #5916 and co-author of CCNA Security 210-260 Complete Video Course, provides a streamlined introduction to DHCP snooping, a barrier to denial-of-service and man-in-the-middle attacks on organizational networks.

Linux File Management Basics: By Ross Brunson, Sean Walberg; Jan 13, 2016; This chapter from CompTIA Linux+ / LPIC-1 Cert Guide: (Exams LX0-103 & LX0-104/101-400 & 102-400) covers Linux file system management as it pertains to the objectives on the CompTIA Linux+ / LPIC-1 exam.

Video: CompTIA A+ (220-901) Complete Video Course - An Overview: By David L. Prowse; Dec 31, 2015; In this excerpt from CompTIA A+ 220-901 Complete Video Course, David Prowse discusses his complete video course and how it can help you pass the CompTIA A+ 220-901 exam.

Video: CompTIA A+ (220-901): DNS: By David L. Prowse; Dec 30, 2015; In this excerpt from CompTIA A+ 220-901 Complete Video Course, David Prowse discusses DNS, a system of servers that take care of the translation of domain or host names to IP addresses. David defines DNS and shows how DNS works within Windows.

Video: CompTIA A+ (220-901): Diagnostics and Monitoring: By David L. Prowse; Dec 28, 2015; In this excerpt from CompTIA A+ 220-901 Complete Video Course, David Prowse discusses diagnostics and monitoring, including CPU and motherboard temperature, fan speeds, and voltages.

Video: CompTIA A+ (220-901) Complete Video Course - An Introduction to Module 1: Hardware: By David L. Prowse; Dec 25, 2015; In this excerpt from CompTIA A+ 220-901 Complete Video Course, David Prowse introduces Module 1 on hardware and discusses the topics covered in this module, including motherboard components, the CPU, RAM, PC expansion cards, and more.

Video: CompTIA A+ (220-901) - PC Build: Power: By David L. Prowse; Dec 23, 2015; In this excerpt from CompTIA A+ 220-901 Complete Video Course, David Prowse shows you how to install your power supply into the case of your computer when building your PC.

Video: CCNA Security 210- 260: Configuring IOS for Device Admin with ACS: By Omar Santos, Mason Harris, Aaron Woland; Dec 21, 2015; In this excerpt from CCNA Security 210-260 Complete Video Course, Aaron Woland discusses configuring IOS for device administration using ACS.

Video: CCNA Security 210-260: IPS Configuration Basics: Rules and Detection Methods: By Omar Santos, Mason Harris, Aaron Woland; Dec 17, 2015; In this excerpt from CCNA Security 210-260 Complete Video Course, Mason Harris discusses rules and detection methods for IPS configuration methods, including false positives and negatives, types of methods for IDS/IPS detection, and signature-based, policy-based, anomaly-based, and reputation-based IDS/IPS rules.

Video: CCNA Security 210-260 Complete Video Course: An Introduction: By Omar Santos, Mason Harris, Aaron Woland; Dec 16, 2015; In this excerpt from CCNA Security 210-260 Complete Video Course, the authors introduce their video course and discuss what they will cover.