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CCNA Routing and Switching

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Configuring an IP Addressing Scheme
By Sean Wilkins
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
By Sean Wilkins
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
By Sean Wilkins
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
By Sean Wilkins
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.
CCNA ICND2 Cert Guide: Variable Length Subnet Masks
By Wendell Odom
Dec 19, 2011
This chapter introduces VLSM, including VLSM Concepts and Configuration, Finding VLSM Overlaps, Adding New Subnets to an Existing VLSM Design, and Designing a Subnetting Plan Using VLSM.
Ethernet Essentials
By Sean Wilkins
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
By Sean Wilkins
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
By Sean Wilkins
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
By Sean Wilkins
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
By Sean Wilkins
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)
By Wendell Odom
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.
Exam Profile: Cisco CCNA 640-802
By Wendell Odom
Dec 2, 2011
Wendell Odom profiles the Cisco CCNA 64-802 exam. Find out what you can expect to see on the exam and how you can better prepare for it.
Exam Profile: Cisco CCNA ICND2 640-816
By Wendell Odom
Dec 2, 2011
Wendell Odom profiles the Cisco CCNA ICND2 640-816 exam. Find out what you can expect to see on the exam and how you can better prepare for it.
OSI and TCP/IP Model Layers
By Sean Wilkins
Nov 22, 2011
Because both the OSI and TCP/IP models are still used when describing modern day protocols, this article will take a look at them both, including their layers and how they can be related to each other.
The TCP/IP and OSI Networking Models
By Wendell Odom
Nov 21, 2011
This chapter explains the terminology and concepts behind TCP/IP. It also explains the terminology behind the OSI networking model in comparison to TCP/IP.
CCNP: Troubleshooting OSPF
By Anthony Sequeira
Nov 14, 2011
In this article, Anthony Sequeira discusses basic troubleshooting steps for the complex, link-state routing protocol Open Shortest Path First (OSPF).
CCNA: Controlling Trunk Links
By Anthony Sequeira
Nov 9, 2011
In this article, Anthony Sequeira walks students through CCNA-level material regarding trunk links in a Cisco switched network infrastructure.
(Video) Exam Profile - CCNA ICND2 640-816
By Wendell Odom
Nov 2, 2011
Cisco's ICND2 640-816 exam picks up where the ICND1 exam leaves off, covering more advanced LAN switching features and going deeper into IP subnetting. Find out what you can expect to see on the exam and how you can better prepare for it.
Why Did We Publish New CCNA Cert Guide Books?
By Wendell Odom
Oct 18, 2011
Wendell Odom and Cisco Press revised their ICND1 and ICND2 books to provide new and improved features to the overall package. This article spells out what’s in the new books.
CCNA SEC: Router Hardening
By Anthony Sequeira
Sep 14, 2011
This article discusses various means of making sure your routers are set up with maximum security, including manually hardening the router and router hardening with Cisco SDM.

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