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Applying the Principles of Network Design
Feb 1, 2002
To illustrate three basics of highly scalable networks, this Cisco Press sample chapter "reforms" a network that is experiencing stability problems to make it stable and scalable.
Basic Access List Configuration for Cisco Devices
Apr 4, 2011
This article discusses the basic concepts of how ACLs work and shows how a basic ACL is configured.
Basic Cisco IOS Software and Catalyst 3550 Series Security
Jul 25, 2003
Become comfortable with basic Cisco IOS Software and Catalyst 3550 security features with an introduction to password management, disabling unnecessary services, setting up secure HTTP and NTP services, and SSH.
Basic Data Transmission in Networks: MAC Tables and ARP Tables
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.
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 Intrusion Prevention System (IPS) Concepts and Configuration
Jun 29, 2011
This article looks at the current IOS device based network intrusion prevention system (NIPS).
Basic Layer 3 Routing Concepts
Oct 6, 2015
How does a message get from point A to point B on a network? Though the question may seem simple, the process isn't. Sean Wilkins, co-author of CCNA Routing and Switching 200-120 Network Simulator, discusses how basic packet routing works.
Basic NAT Concepts and Configuration
Jul 6, 2011
This article looks at some of the basic concepts that are used when configuring NAT and reviews the configuration steps required to get NAT working.
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.
Basic Zone-Based Firewall Fundamentals
Feb 23, 2011
Sean Wilkins explains the fundamentals of zone-based firewalls.
Basics of the PIX Firewall
Nov 7, 2003
There are several areas of a network in a secure environment; the most common are the inside, the outside, and the DMZ firewalls that help divide and control traffic between them. Cisco has designed the PIX series of firewalls to be the primary devices for performing these functions. This chapter covers the basics of the PIX firewall areas that connect to the firewall—the trusted, untrusted, and DMZ.
Border Gateway Protocol, Route Manipulation, and IP Multicast
Oct 26, 2007
Prepare for the CCDA exam by reviewing BGP, Route Manipulation, and IP Multicast.
Build Your Own Customized IT Certification Ladder
Dec 20, 2010
In this article, you’ll take a look at the how to customize a certification ladder that matches your professional goals and aspirations.
CCDA and CCDP Flash Cards: Content Networking
Mar 19, 2004
CCDA DESGN 640-864: Designing Remote Connectivity
Oct 6, 2011
This chapter discusses wide-area network technologies and design and includes sections covering Identifying WAN Technology Considerations, Designing the Enterprise WAN, and Designing the Enterprise Branch.
CCDA Self Study: Basic Campus Switching Design Considerations
Jan 16, 2004
Diane Teare introduces general campus switching design considerations and describes modularity in switching designs as preparation for CCDA exam 640-861.
CCDA Self-Study: RIP, IGRP, and EIGRP Characteristics and Design
Dec 12, 2003
This sample chapter reviews distance-vector routing protocols, covers both versions of the Routing Information Protocol, and discusses the Cisco Interior Gateway Routing Protocol and Enhanced Interior Gateway Routing Protocol — important knowledge for the CCDA.
CCDE Study Guide: Enterprise Campus Architecture Design
Nov 23, 2015
In this chapter from CCDE Study Guide, Marwan Al-shawi discusses issues related to enterprise campus architecture design, including hierarchical design models, modularity, access-distribution design model, layer 3 routing design considerations, EIGRP versus link state as a campus IGP, and enterprise campus network virtualization.
CCDP Self-Study: Designing High-Availability Services
Mar 18, 2005
Cisco IOS high-availability technologies provide network redundancy and fault tolerance. Reliable network devices, redundant hardware components with automatic failover, and protocols like Hot Standby Router Protocol (HSRP) are used to maximize network uptime. This chapter will help you get a handle on high-availability technologies.
CCENT and CCNA Certification 2013: Which Exam Should You Take?
Mar 26, 2013
If you are considering taking the exams to become certified as a Cisco Certified Entry Networking Technician (CCENT) or Cisco Certified Network Associate (CCNA), this article by Cisco expert Michelle Plumb will help you decide which exams you should take.

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