Cisco IOS Command Summary—Four Modes to Access and Configure a Cisco Router The four modes for accessing and configuring a Cisco router are: user EXEC mode, privileged EXEC mode, global configuration mode, interface configuration mode Each mode has a unique command set. Purpose of…
How to Troubleshoot OSPF?

OSPF is one of our more complicated routing protocols, and it can be pretty intimidating, especially at first. But once you have mastered how to configure this Link State Protocol, the first thing you realize is that it is built…
How to Configure Cisco PIX Firewall?

How to configure a new PIX firewall? You will need to will configure passwords, IP addresses, network address translation (NAT) and basic firewall rules. If you have a new PIX firewall that has never been configured, it will need to…

Interface configuration is one of the most important configurations of the switch. Without interfaces, the switch is useless. Interface configurations must be exact to be able to communicate with other devices. Interface configuration will be presented for three different devices…
How to Protect Router Password?

Administrators can access a router for administrative purposes in a variety of ways. For example, as shown in Figure 3-2, a PC running terminal emulation software can telnet into a router. The Telnet connection is considered to be using a…

What books will help you with your Cisco certification? Here are some top picks for CCNP, CCIE, and CCNA study guides. 1. CCIE Practical Studies, Vol. 1 Karl Solie With a focus on the lab portion of the exam, this…

IPv6 address a lot concerns and issues that are faced today in using IPv4. Cisco CCNA Certification requires that a candidate must have a general overview of IPv6 and what new features it brings into the world of networking. Here…
Core Topics Covered on the CCNA Exam

Passing the Cisco CCNA certification is not an easy task. Cisco ensures passing the CCNA remains prestigious by maintaining the difficulty level of the CCNA exam by changing the exam pattern regularly. With the difficulty level being where it is,…
How to Configure A Cisco Switch?

When executing an inter-network installation, many mechanisms and components are usually involved. Cisco is superior because it is the only inter-networking company with a well made end to end inter-networking solution. Cisco switches makes the LAN more competent by creating…
Classification of Routing Protocols

A routing protocol is a protocol that specifies how routers communicate with each other, disseminating information that enables them to select routes between any two nodes on a computer network, the choice of the route being done by routing algorithms.…
What Are the Basic Cisco Router Commands?

Cisco routers are manageable network devices. It means that they have the Cisco IOS software for network and internetwork management. The Cisco’s IOS software delivers network services and enabled networked applications. The Cisco IOS is the CLI based software at…