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).
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 :
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.
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'.
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.
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
Subscribe to:
Comments (Atom)