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Learn IPv6 Part-3

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Compare IPv6 header VS. IPv4 header


Filed under: by: Network World

How to find Your Files Quickly using Instant Search

You can easily track down any important document, photo, e-mail message, song, video, file, or program on your PC using Instant Search.

From the Windows menu

Go to the Start menu by clicking the Windows logo and begin typing where you see “Start Search.” After you type, Windows Vista instantly searches documents, media, e-mails, events, files, programs, favorites, and more.


From other places in Windows

Explorer in Windows Vista displays Instant Search in the top-right corner. It’s always with you when you’re using any explorer, including the Documents Explorer, Music Explorer, Pictures Explorer, and new Search Explorer. Just like using Instant Search from the Start menu, you only have to type a few letters to quickly display the most relevant results.
You can also find search features in other places like Windows Internet Explorer® 7, Windows Photo Gallery, Windows Control Panel, and even Windows Media Player™. Anywhere you see it, just start typing to find what you’re looking for.

Free Softwares

Filed under: by: Network World

AVG Anti-Virus Free Edition

AVG Free Edition is the well-known antivirus protection tool.

Features:

  • Free of charge to home users for the life of the product.
  • Rapid virus database updates are available for the lifetime of the product
  • Easy to use
  • Not slow your system down
  • include automatic update functionality, the AVG Resident Shield and AVG Virus Vault for safe handling of infected files.
Download link

Cisco CCNA 640-802 Tutorials Part-4

Filed under: , by: Network World

Importance of the levels of privilege in the Cisco IOS

Cisco IOS offers 16 privilege levels ( 0-15) for access to different commands or to make your router more secure.

The higher your privilege level mean the more router access you have and vice versa.

But most users or network administrators are familiar with only two privilege levels:

  • User EXEC mode—privilege level 1
  • Privileged EXEC mode—privilege level 15

or

  • privilege level 0 — Includes the disable, enable, exit, help, and logout commands.

  • privilege level 1 — Normal level on Telnet; includes all user-level commands at the router> prompt.

  • privilege level 15 — Includes all enable-level commands at the router# prompt.


By default you are in user EXEC mode (level 1) When you log in to a Cisco router.In this mode, you have access to limited information about the router, such as the status of interfaces, and you can view routes in the routing table. However, you can't make any changes or view the running configuration file.

By typing enable command takes you to level 15, privileged EXEC mode. In the Cisco IOS, In other words, you have full access to the router.

In bigger organization to properly manage and secure the router , Cisco gives the idea of levels

Configure the Levels

  • Show privilege: This command displays the current privilege. Here's an example:
router# show privilege
Current privilege level is 3
  • Enable: this command used to go to privileged EXEC mode. However, it can also take you to any privileged mode. Here's an example:
router# show privilege
Current privilege level is 3
router# enable 1
router> show privilege
Current privilege level is 1
router>
  • User: While this command configures users, it can also tell the IOS which privilege level the user will have when logging in. Here's an example:
router(config)# username test password test privilege 3
  • Privilege: This command configures certain commands to be available only at certain levels. Here's an example:
router(config)# enable secret level 5 level5pass
  • Enable secret: By default, this command creates the password to get to privilege mode 15. However, you can also use it to create passwords to get into other privilege modes that you create.