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Trunking Mechanics of Cisco Network Switches
By Sean Wilkins
Aug 27, 2015
Every network engineer must have a good understanding of how trunks work in an Ethernet switching environment. Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, shows how trunks carry traffic from multiple VLANs across switches to their configured switchports, and discusses the Cisco modes and commands that configure trunking ports.
Understanding the Big Data World
By George Trujillo, Rommel Garcia, Steve Jones, Charles Kim, Justin Murray
Aug 20, 2015
The data volume, velocity, variety, and need to perform analytics on data from multiple different sources are disrupting business. The authors of Virtualizing Hadoop discuss how big data solutions such as Hadoop, in-memory, distributed search, and NoSQL are solutions for addressing the data disruption.
CompTIA Network+ N10-006 Quick Reference: WAN Technologies
By Anthony Sequeira
Aug 13, 2015
In this chapter from CompTIA Network+ N10-006 Quick Reference, Anthony Sequeira discusses various WAN technologies, such as fiber, satellite, broadband cable, and WiMAX.
Five Crucial Commands for Verifying Cisco Switch Network Status and Operational State
By Sean Wilkins
Aug 11, 2015
A network engineer needs to be conscious of the state of the network and every device connected to it. But when your network consists of multiple devices connected at a distance, how can you test connections and keep on top of network performance? Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, discusses five basic commands you need to know and use correctly to maintain your Cisco network.
Nine Switch Commands Every Cisco Network Engineer Needs to Know
By Sean Wilkins
Aug 4, 2015
Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, provides a quick overview of nine commands that are essential for working with Cisco networks, whether or not your goal is certification.
Network Switching Methods: Store-and-Forward Versus Cut-Through
By Sean Wilkins
Jul 28, 2015
Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, believes every network engineer should understand the differences between the two major switching methods employed in computer networks. This overview discusses the two methods from their initial deployments to modern usage.
Crafting a Personal Certification Plan (2015 Edition)
By Ed Tittel, Mary Kyle
Jul 27, 2015
Aspiring or active IT professionals seeking certification will want to construct a personal certification plan to reflect both long- and short-term certification goals. This is a living document that you should update at least once a year to react to changes in the job market, personal and professional interests, and work opportunities and situations. In this article, Ed Tittel and Mary Kyle show you how to construct your personal certification plan.
Benefits of IT Certification (2015 Edition)
By Ed Tittel, Mary Kyle
Jul 20, 2015
Aspiring and active IT professionals seeking certification may benefit from understanding the many benefits that can result from earning one or more professional certification credentials. Ed Tittel and Mary Kyle take a look at several potential benefits that certification offers to IT professionals.
Packet Switching Methods on Cisco Networks
By Sean Wilkins
Jul 14, 2015
Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, teaches new networking students the basics they need to know about packet switching on Cisco networks. Experienced network engineers will find this article a useful refresher course on Cisco technology.
VLAN Communications: Making Networks Talk to Each Other
By Sean Wilkins
Jul 7, 2015
Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, discusses routing and communications options for virtual networks in various configurations.
Network Loop Prevention with the Rapid Spanning Tree Protocol (RSTP)
By Sean Wilkins
Jun 30, 2015
Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, examines the differences between the Spanning Tree Protocol (STP) and the more modern Rapid Spanning Tree Protocol (RSTP).
Installation and Configuration of WAN Technologies
By Emmett Dulaney
Jun 22, 2015
This chapter from CompTIA Network+ N10-006 Exam Cram, 5th Edition covers characteristics and benefits of various WAN technologies, and explains how to install and configure equipment in the appropriate location using best practices.
VLAN Configuration Fundamentals and Commands
By Sean Wilkins
Jun 15, 2015
After becoming familiar with basic VLAN concepts, you need to learn how to configure your organization's networks and devices. Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, discusses important concepts and commands you will use in setting up networks and getting devices to talk to each other.
Implementing Cisco IP Switched Networks (SWITCH) Foundation Learning Guide: Campus Network Architecture
By Richard Froom, Erum Frahim
Jun 4, 2015
This chapter from Implementing Cisco IP Switched Networks (SWITCH) Foundation Learning Guide: (CCNP SWITCH 300-115) covers implementing VLANs and trunks in campus switched architecture, understanding the concept of VTP and its limitation and configurations, and implementing and configuring EtherChannel.
Implementing Cisco IP Switched Networks (SWITCH) Foundation Learning Guide: Network Design Fundamentals
By Richard Froom, Erum Frahim
Jun 1, 2015
This chapter from Implementing Cisco IP Switched Networks (SWITCH) Foundation Learning Guide: (CCNP SWITCH 300-115) begins the journey of exploring campus network design fundamentals by focusing on a few core concepts around network design and structure and a few details about the architecture of Cisco switches.
Virtual vs. Physical LANs: Device Functionalities
By Sean Wilkins
May 29, 2015
If you have a good grasp of the basics of local access networks (LANs), it's time to step up your game. Sean Wilkins, co-author of CCNA Routing and Switching ICND2 200-101 Official Cert Guide, explores the concepts behind virtual LANs, how they differ from physical LANs, and why VLANs make sense for modern organizations.
Implementing Cisco IP Switched Networks (SWITCH) Foundation Learning Guide: Fundamentals Review
By Richard Froom, Erum Frahim
May 27, 2015
This chapter from Implementing Cisco IP Switched Networks (SWITCH) Foundation Learning Guide: (CCNP SWITCH 300-115) covers the following basic switching topics as a review to CCNA: hubs and switches, bridges and switches, switches of today, broadcast domains, MAC addresses, the basic Ethernet frame format, basic switching function, VLANs, the Spanning Tree Protocol, trunking, port channels, and multilayer switching (MLS).
Basic Data Transmission in Networks: MAC Tables and ARP Tables
By Sean Wilkins
May 12, 2015
Bombarded with jargon, no wonder networking beginners get lost. Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, explains some crucial terminology for anyone who needs to understand complex networking.
CCNP Security SISAS 300-208 Official Cert Guide: Authentication Policies
By Aaron Woland, Kevin Redmon
May 6, 2015
In this chapter from CCNP Security SISAS 300-208 Official Cert Guide, the authors discuss network authentication policies.
Collision Domains and Broadcast Domains = Apples and Oranges
By Sean Wilkins
May 5, 2015
Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, doesn't approve of blurring collision domains and broadcast domains. Though these models are often taught together, modern technology has outpaced some of the ideas, and networking specialists who are new to the field need to distinguish between current terminology and outdated concepts.

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