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Introduction to Network Time Protocol (NTP)
Mar 20, 2012
This article serves as your introduction to the Network Time Protocol (NTP), which helps ensure that the time across network devices is accurate.
Advanced IPv4 Concepts and Examples
Feb 29, 2012
This article includes a longer discussion of how subnetting is used to separate a larger address space into smaller pieces for more efficient assignment and routing.
Anatomy of an IPv4 Packet
Feb 29, 2012
This article takes a look at the IPv4 packet, the fields that are defined within it and how they are used to transport the traffic from source to destination.
Configuring an IP Addressing Scheme
Feb 29, 2012
This article takes a look at the practical implementation of example ranges on Cisco IOS as well as the configuration of a basic Routing Information Protocol (RIP) network showing a complete routing table between all organizational departments.
Creating a Basic IP Addressing Scheme
Feb 29, 2012
This article puts together an IP addressing scheme based on the requirements of an imaginary organization. The math that is required to come up with each of the networks will be covered and visually displayed to ensure that the concepts are clearer to understand.
Domain Name System Basics
Feb 29, 2012
This article takes a look at how the DNS system operates and is able to maintain a list of updated domain name to IP mappings while maintaining performance.
IP Subnetting Basics
Feb 29, 2012
This article is intended as an addressing and subnetting primer and will initially review what the Internet Protocol (IP) address is and how it is structured; it will then go over a number of the main IP concepts that are commonly referenced in subnetting documentation and guides.
TCP/IP Fundamentals
Feb 1, 2012
This article takes a look at TCP/IP (version 4), how it is structured and used to route traffic from source to destination across multiple intermediary points. It also covers a couple of the other protocols that are directly connected into the TCP/IP suite including TCP, UDP and ICMP.
Cisco Device Configuration Management
Jan 25, 2012
This article takes a look at how Cisco organizes their configurations within a device, how these different configurations relate to each other and how they can be managed to ensure that the desired result is achieved. It also covers the procedure that can be used should the passwords to access the device be lost or forgotten.
Network Verification Commands Review
Jan 25, 2012
This article takes a look at some of the most basic network verification commands that can be used on Cisco equipment and discusses the information that can be obtained from these commands.
Preparation Steps Required to Manage a Cisco Device
Jan 25, 2012
One of the first and most important things that a new engineer needs to learn is how to actually connect to a Cisco device. This article will only cover the configuration of CCP which performs all of the functions of SDM and adds support for unified communications.
Basic Initial Router Configuration
Jan 24, 2012
There are a number of basic things that need to be configured on a Cisco router before it can be used for its primary function (routing). While this article cannot contain all of the possible configuration permutations, it will give you the general configuration steps used.
Basic Switch Security Concepts and Configuration
Jan 24, 2012
This article takes a look at potential threats and at the different techniques and configurations that can be used to avoid them. It should be noted that this article is not intended to show all possible switch security methods but simply highlight the most commonly referenced.
Show Versus Debug Commands
Jan 23, 2012
Show and debug commands are the primary tools used by Cisco network professionals in order to verify and troubleshoot the proper operation of complex networks today. In this article, Anthony Sequeira, CCIE and CCSI, details the purposes, differences, and most common mistakes with these important commands.
Ethernet Essentials
Dec 19, 2011
This article takes a look at what Ethernet is, what is contained within the Ethernet frame structure, common Ethernet LAN devices and discusses the different Ethernet interface variations.
LAN Device Review
Dec 19, 2011
This article takes a look at the different common devices that are seen on a modern network and provides a description of how some of these device functions have been combined over the last 20 years.
LAN Network Cable Media and Connectors
Dec 19, 2011
This article takes a look at the LAN network cable media that is typically installed in most environments and the different connectors that are often used.
The Anatomy of a Packet Path (ICMP) from Source to Destination
Dec 6, 2011
This article takes a look at how the IP packet is structured and routed and then reviews how both the ping and traceroute (tracert) utilities use IP/ICMP packets to perform their functions.
Network Diagram Creation and Interpretation
Dec 5, 2011
This article is intended to be a primer on network diagrams, what the common symbols are, how the symbols are connected and how to interpret the different connectors on a diagram.
Exam Profile: Cisco CCENT/CCNA ICND1 (640-822)
Dec 2, 2011
Wendell Odom profiles the Cisco CCENT/CCNA ICND1 640-822 exam. Find out what you can expect to see on the exam and how you can better prepare for it.

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