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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.
CCNP: The Inner Workings of EtherChannel
Jan 23, 2012
In this article, we examine this Layer 2 technology for bundling physical links together. This article covers all important points that any CCNP candidate should be aware of as they pursue certification and/or success in network implementations.
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.
CCIE Voice v3.0 Quick Reference: Cisco Unified Communications Manager
Jan 17, 2012
This quick reference covers best practices for the deployment of Cisco Unified Communications Manager as well as an overview of compatible codecs and regions.
CCNA ICND2 Cert Guide: Variable Length Subnet Masks
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
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.
CCNP Security Firewall Cert Guide: Recording ASA Activity
By David Hucaby
Dec 16, 2011
To help you prepare for the CCNP Security Firewall 642-617 exam, this chapter covers System Time, Managing Event and Session Logging, Configuring Event and Session Logging, Verifying Event and Session Logging, and Troubleshooting Event and Session Logging.

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