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e-business Infrastructure

File Transfer Protocol (FTP) is an Internet service that helps in transferring files from one computer to another over the Internet.
Layer 2 Tunneling Protocol (L2TP) is a more secure version of Point-to-Point Tunneling Protocol (PPTP). It provides tunneling, address assignment, and authentication.
Virtual private network (VPN) uses a tunneling protocol to span public networks, such as the Internet, without security risk. VPN enables remote users to access corporate networks securely by using a tunneling protocol such as PPTP or L2TP.
TCP/IP is the primary protocol of the Internet.
SMTP uses port 25 by default.
Address Resolution Protocol (ARP) is a network maintenance protocol of the TCP/IP protocol suite. It is responsible for the resolution of IP addresses to media access control (MAC) addresses of a network interface card (NIC).
FTP uses port 20 and 21 by default.
MIME stands for Multipurpose Internet Mail Extensions. It is a standard for multi-part, multimedia electronic mail messages and World Wide Web hypertext documents on the Internet.
The TCP/IP protocol should be bound to the dial-up adapter for Internet access on a Windows 98 computer.

Oracle architecture

The size of the shared pool can be changed dynamically. The data dictionary cache of the shared pool holds the most recently accessed data dictionary information. The shared pool consists of a library cache and data dictionary cache.
Control file, redo log file, and data file are part of an Oracle database.
An SGA and Oracle background processes constitute an Oracle instance. An SGA is ended when an Oracle instance is shut down. Multiple users can share data in an SGA.
While making modifications in SPFILE, the instance should be in open and running state, whereas in the case of PFILE, the instance will have to be first shut down and restarted before making any modifications in it.
V is a dynamic performance view that is used to display the names and the location of all the control files.
Following is the correct sequence of the processes that occur when a database is opened:
1. An initialization parameter file is read.

New Features of Oracle 10g, Oracle 10g Installation, Server Configuration, and Maintenance of the Software

Memory – 512MB, Temp space – 400MB of free space in the /tmp directory applicable for the Unix operating system, Swap space – 1GB or twice the amount of RAM, Free disk space – 1.5GB are the minimum hardware requirements to install Oracle 10g.
The Installation Type list box is used to decide the type of installation.
Oracle Management Agent (OMA) is a centralized administrative tool that is capable of administering the database server and an application server.
The location (/u01/app/oracle) will be considered as the base of Optimal Flexible Architecture (OFA).
The password file is used to authenticate the administrative tasks from remote locations.
An Oracle 10g client can be used to connect to an Oracle 8i or 9i database by using the following syntax:
Continue reading “OCP 1Z0-040 Short Notes: Exam passing tips”

Creating and Managing Microsoft Windows Services, Serviced Components, .NET Remoting Objects, and XML Web Services

The SessionID property of the HttpSessionState class identifies an active ASP.NET session by using a unique session ID.
The Process.Start method is used to start a Windows application and is registered in the system registry on a computer.
A constructor is used to create an object that is an instance of a class. It has the same name as the class in which it resides.
A sealed class is a class that cannot be derived from. Sealed classes are primarily used to prevent unintended derivation.
If a class derives from the ServiceBase class, the OnCustomCommand method is executed when the Service Control Manager (SCM) passes a custom command to the service. This method is used to specify actions when a command with the specified parameter value occurs.

Overview of Electronic Commerce

B2C stands for business-to-consumer. B2C involves transactions conducted between businesses and consumers over the Internet. For example, placing an order for a book or a home appliance by a consumer to a business over the Internet.

B2B stands for business-to-business. B2B involves transactions conducted between businesses over the Internet. It is used to exchange products, services, or information between businesses. B2B is also known as e-biz.

The World Wide Web Consortium (W3C) is an international industry consortium that develops common standards for the World Wide Web to promote its evolution and interoperability.

E-commerce sites offer a wide access to existing markets. Moreover, they give new access to undiscovered markets. Online stores have many advantages over the traditional stores.