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Video: CompTIA A+ (220-901): DNS: 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.

WAN Technologies: Important Points of Interest, Part 1 of 3: Dec 29, 2015; In the first article of a three-part series, Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, Academic Edition, provides an overview of some of the wide area networking (WAN) technologies that network engineers need to know to get that first job in the industry, or to move up in their chosen field.

Video: CompTIA A+ (220-901): Diagnostics and Monitoring: 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: 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: 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: 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: 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: LPIC-1 Exam 102: Working witih Read and Arguments: Dec 17, 2015; There are two generic solutions to make a script interactive: read and arguments. In this excerpt from LPIC-1 (Exam 102) LiveLessons: Linux Professional Institute Certification Exam 102, Sander van Vugt discusses both read and arguments.

Video: CCNA Security 210-260 Complete Video Course: An Introduction: 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.

Video: LPIC-1 Exam 102: Understanding Routing: Dec 16, 2015; In this excerpt from LPIC-1 (Exam 102) LiveLessons: Linux Professional Institute Certification Exam 102, Sander van Vugt discusses routing and how routers work.

Video: CCNA Security 210-260: Configuring IPsec Site-to-Site VPNs in Cisco ASA: Dec 14, 2015; In this excerpt from CCNA Security 210-260 Complete Video Course, Omar Santos shows you how to create a site-to-site VPN tunnel between R1 and the Cisco ASA.

Video: LPIC-1 Exam 102: Creating an Example Database and Basic Data Manipulation: Dec 14, 2015; In this excerpt from LPIC-1 (Exam 102) LiveLessons: Linux Professional Institute Certification Exam 102, Sander van Vugt shows you how to install and create a database and then manipulate the data, in order to help you pass the LPIC-1 Exam 102.

Video: CCNA Security 210-260 Complete Video Course: An Overview: Dec 10, 2015; In this excerpt from CCNA Security 210-260 Complete Video Course, Aaron Woland, Mason Harris, and Omar Santos introduce themselves and discuss what you will learn in this course, including BYOD, mobile device management, Cisco ACS, pros and cons of different types of security devices, attack methods, and configuring and troubleshooting SSL and IPSec VPN, among many other topics.

Video: ITIL Foundation Exam: Transition Planning & Support: Dec 9, 2015; In this excerpt from ITIL Foundation Exam LiveLessons, Jill Knapp discusses transition planning and support in ITIL, the purpose of which is to provide overall planning for service transitions and to coordinate the resources that they require.

TACACS+ vs. RADIUS: Similarities and Differences: Dec 8, 2015; If you're responsible for the security of your organization's network, it's important to examine all the possibilities. Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, examines these two long-time AAA favorites, discussing how they protect your network's vital resources.

Video: OCA Java SE 8 Programmer I (1Z0-808): Understanding Integer Primitive Types Literal Forms: Dec 7, 2015; In this excerpt from OCA Java SE 8 Programmer I (1Z0-808) Complete Video Course, Simon Roberts looks at the formats of literal values that represent integers.

Video: OCA Java SE 8 Programmer I (1Z0-808): Using Common String Methods to Perform Comparisons: Dec 4, 2015; In this excerpt from OCA Java SE 8 Programmer I (1Z0-808) Complete Video Course, Simon Roberts takes a look at some of the string methods that perform comparisons.

Network Address Translation (NAT) Implementation Methods: Dec 1, 2015; Have you ever adjusted to a new area code or ZIP code? Everyone needs unique phone numbers and addresses, which is a struggle for the phone companies and the post office. The Internet has the same growing pains on a planetary scale, with everyone's Net-connected devices needing unique IP addresses. Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, explains how Network Address Translation makes it possible for all of us and our gadgets to communicate.

Video: CCNA Wireless 200-355: Encryption: Nov 30, 2015; In this excerpt from CCNA Wireless 200-355 Complete Video Course, Jerome Henry discusses an important security component of Wi-Fi: encryption.

Video: CCNA Wireless 200-355: RF Characteristics - Frequency, Amplitude, Phase, Wavelength: Nov 26, 2015; To work with Wi-Fi, you need to understand how waves work. In this excerpt from CCNA Wireless 200-355 Complete Video Course, Jerome Henry discusses RF characteristics: frequency, amplitude, phase, and wavelength.