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A free CCNA tutorial site that closely follows the Cisco CCNA curriculum. Here you can find articles that will help you to study for your CCNA exam. Cisco Router Configuration Tutorial. Cisco Inter-network Operating System: The Cisco IOS software provides access to several different command modes. This study guide is intended to provide those pursuing the CCNA certification with a framework of what concepts need to be studied. This is.
For security purposes, the Cisco IOS software provides two levels of access to commands: user and privileged. The unprivileged user mode is called user EXEC mode.
The privileged mode is called privileged EXEC mode and requires a password. The following table describes some of the most commonly used modes, how to enter the modes, and the resulting prompts. Configuration mode has a set of submodes that you use for modifying interface settings, routing protocol settings, line settings, and so forth.
Use caution with configuration mode because all changes you enter take effect immediately.
To enter configuration mode, enter the command configure terminal and exit by pressing Ctrl-Z. Note:Almost every configuration command also has a no form.
In general, use the no form to disable a feature or function. Use the command without the keyword noto re-enable a disabled feature or to enable a feature that is disabled by default. For example, IP routing is enabled by default.
To disable IP routing, enter the no ip routing command and enterip routing to re-enable it. Getting Help In any command mode, you can get a list of available commands by entering a question mark?
To obtain a list of commands that begin with a particular character sequence, type in those characters followed immediately by the question mark?
VRF Virtual […].
The internet and intranet are closely related terms. Some individuals may get these terms confused or use them interchangeably. While there are similarities, the internet and intranet are used for very different purposes.
What Is an Internet Network?
When you visit a website or use a mobile app that requires an internet connection, you are […]. Firewalls are designed to monitor incoming and outgoing traffic, helping to keep […].
Denial of Service attacks DoS are very common these days. Usually […]. All […]. From ASA 8.
Up to ASA software 8. The newest ASA software 8. There are limits on the number of […]. NMAP Network Mapper is the de facto open source network scanner used by almost all security professionals to enumerate open ports and find live hosts in a network and much more really. One of my responsibilities in my job is to perform white hat penetration testing and security assessments in corporate systems to evaluate their […]. Network infrastructure devices routers, switches, load balancers, firewalls etc are among the assets of an enterprise that play an important role in security and thus need to be protected and configured accordingly.
Many enterprises focus on protecting their data, servers, applications, databases etc but they forget about security of network devices which are sometimes installed […].
My name is Harris Andrea and I would like to extend a warm welcome to you. About me in a few words. About this Website About 10 years ago, I decided to create a blog to share my experience in the form of Cisco networking tutorials, configuration examples, guides, tips, industry news etc for both beginners and experts. Networks Training Cheat Sheets Subscribers. VRF Virtual […] [Continue reading].
When you visit a website or use a mobile app that requires an internet connection, you are […] [Continue reading]. Firewalls are designed to monitor incoming and outgoing traffic, helping to keep […] [Continue reading].