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Oracle Database Stages

1)Instance Started
2)Database Mounted
3)Database Opened
4)Database Started.
Pick up a book on Oracle Concepts/Architecture and Admin/Backup and Recovery for a more complete answer.

Startup Nomount : -

Read the parameter file and start the instance.
Instance name identified by ORACLE_SID env parameter.
The parameter file controls such things as SGA size, database name that can connect to this instance.
Database not associated with instance yet. <br/>
As an example, you may need to do this if you will mount a standby database.<br/><br/>

Basics to configure a CISCO router to connect to internet.

Any Cisco router you have around you say Cisco 1000, 1600, 2500, 2600, And 3600 Series Routers. Any cisco router you have the below configurations will be able to workout. These configurations will help you connect your LAN onto internet, Provide basic security to your Local Area Network (LAN) so that no other network connects if not defined in the configs. 
I will go straight to what I have around me to have this configuration done successfully.

Router Configuration 101: Connecting the router to the Internet

To answer a recent question from a member, I decided to address the basics of Cisco router configuration in a three-part series. In part 1 of this series, "Router Configuration 101: Setting up the router," I walked you through the process of connecting a new Cisco router, configuring it through the console, and familiarizing yourself with the different IOS administrative modes the router offers. In part 2, "Router Configuration 101: Configuring and securing the router," we secured the router with passwords, applied IP addresses to interfaces, and enabled those interfaces for use.

Configuring a router to act as an ISP

Packet Tracer ISP
Overview:  Configure a Router to act as an ISP
Difficulty: Easy
Objective: To have a router acting like an ISP for upcoming Lab Setup

Connecting GNS3 to Real Networks

One of the interesting things about GNS3 is that you can connect your topology to the real world. For some of your CCNA and CCNP studies you may need to run an actual Web browser or Cisco’s Security Device Manager (SDM) among others. Just connect your topology to your real PC.
You could even connect to virtual machines running on your computer inside VMware or Virtual

Configuration of Routers to two Linux VMWare

Configuration of R1:

Router DHCP IP to PC


Router Configuration Script:

hostname Router