Different Between Switch & Router & Hub .

Different Between Switch & Router & Hub .

Switch	Router
1) Switch is layer - 2 & layer - 3 device.	1) Router always Layer - 3 device.
2) Switch Work with MAC address (layer -3 switch work with IP).	2) Router always work with IP.
3) Switch has many collision domain.	3) Router always broadcast domain.
4) Switch has many port.	4) Router defaultly has two port ethernet & serial named as CO & SO.
5) Switch make the MAC table.	5) Router doesn’t make MAC table.
6) Switch has ASCII Code.	6) Router has only IOS.

LAN Cables : Straight Cable (568B) & Cross Cable (568A)

Now About the cable used for networking:

There are normally Two Cable Used Frequently
1) Straight Cable (568B)
2) Cross Cable (568A)

Networking Port & Protocol

Some of the Important Ports And Protocol : 

DNS : Domain Naming System
TCP : Transmission control protocol
IP : Internet Protocol
UDP : User Datagram protocol
FTP : File_Transfer_Protocol
TFTP : Trivial_File_Transfer_Protocol
RIP : Routing_Information_Protocol

7 layers of Networking (OSI Layer)

OSI Layer – Open System Interconnection

7 layers of OSI Layer.

Protocol	OSI Layer	Devices
FTP,HTTP,SMTP,TELNET	Application	Gateway
Mpeg, Jpeg & Other Movie Format.	Presentation	Gateway
SQL,NFS,ASP	Session	Gateway
TCP,SPX,UDP	Transport	Gateway
ICMP,RIP,OSPF,IGRP,EIGRP	Network	Router, Brouter
Token ring, FDDI,PAP,CHAP	Data link	Switch, Bridge
X	Physical	Cables, Repeater,Hub

NAT and SQL Server and Exchange Server

NAT and SQL Server and Exchange Server
In computer networking, the process of network address translation (NAT, also known as network masquerading, native address translation or IP-masquerading) involves re-writing the source and/or destination addresses of IP packets as they pass through a router or firewall. Most systems using NAT do so in order to enable multiple hosts on a private network to access the Internet using a single public IP address (see gateway).

Basic RAID Levels

Basic RAID Levels

Basic RAID levels are the building blocks of RAID. Compound RAID levels are built using the concepts described here.

JBOD

JBOD is NOT RAID. JBOD stands for 'Just a Bunch Of Disks'. This accurately describes the underlying physical structure that all RAID structures rely upon. When a hardware RAID controller is used, it normally defaults to JBOD configuration for attached disks.

Some disk controller manufacturers incorrectly use the term JBOD to refer to a Concatenated array.

ABAP Program .Knowing about the Arithmetical, Relational and Logical operations also about Conditional and Loop Statement with Program. D 0.3 Little more than Basic

Little more than ABAP Programing .Knowing about the Arithmetical, Relational and Logical operations also   about Conditional and Loop Statement with Program.

Arithmetical operations :

Addition  : +
Division  : /
Subtract  : -
Multiply  : *
Remainder : MOD

What is Networking ?

What is Networking ?

Ans: In simple word, Networking means connecting two or more devices together..

      

For Network We need Cables .. 

Check the Figure below for details:

About ABAP Program and more D 0.2 ver 0.2 [Working With Selection Text ,Parameters and its Options (With Program) ]

Working With Selection Text ,Parameters and its Options (With Program).

Value Keywords - By using a value Keywords we can default a variable vale

Syntax :

Data : <variable name> type <data type> value <value>.

Example :

Data : v_num type I value 100.
Write : 'the value is', V_num.

Result :

ABAP Program D.0.1 Demo for entire data type.

Demo for entire data type.(except integer as its in Program 0.1).

Program Name: ZRV_CHAR_DEMO

Coding:

DATA : V_NAME(10) TYPE C.
*inside bracket tells about the length of the character.
V_NAME = 'NERDSAP'.
WRITE : /'THE NAME IS ', V_NAME.

Sample ABAP Program

Sample ABAP Program

Go to SE38 (ABAP Editor).
[ABAP Program name will start with Z or Y (Custom programs), Remaining Alphabets are predefined by SAP].

Program Name : Zrv_First _Program
{Click on Create or Press F5} {Display - F7} {Change - F6}

ABAP Program 0.2

Now in this program we will check out Write Statement.
PROGRAM NAME : ZRV_WRITE_DEMO

We are trying to get a output as below:
Nerd
        SAP
               Blopspot
Coding:
Write : 'Nerd',
            /5'SAP',
            /8'Blopspot'.

ABAP Program 0.1

Program name: ZRV_INTERGER_DEMO

Coding:
data: v_int type I.
v_int = 100.
Write : 'the value of integer is ', v_int.

Basic ABAP knowledge

More about SAP ABAP ver 0.1

ABAP (Advanced Business Application  Programming ) is business oriented language. we need to program using database

Type this on Command line:
/O - Generate Session
/I - Kill a Session
/N - New Session
/NEX - Exit SAP

To create a new session with Tcode:
/NSE38 {/N(Tcode)}
To generate a session with Tcode:
/OSE38
To kill a session just type :
/I
To exit sap
/NEX

SAP ECC (ERP software) on Ubuntu 11.10 on VMware Player

Hi Everyone..In this video I will be showing how to get started with ubuntu to use SAP ECC 6.0 on it..

Lets Get Started ..

Things you Need to run SAP on linux..

Ubuntu 11.10 Operating System on the computer..

(If you need help to install it. Just post a request. I will create a Video.)

You need VMware player installed too..

(If you need help to install it. Just post a request. I will create a Video.)

Last But not the Least the Virtual Image of SAP .

(If you need help to install it. Just post a request. I will create a Video.)