HOW TO CALCULATE IP ADDRESS

27	26	25	24	23	22	21	20	Power
128	64	32	16	8	4	2	1	Value
1	1	1	1	1	1	1	1	255

Based on the above table, this is the formula for calculating the IP address .

This is how to calculate IP address :

Examples :

1111 1111 . 1111 1111 . 1111 1111 . 0000 0000

       

        8         +         8        +          8        +         0           = 24

128 + 64 + 32 + 16 + 8 + 4 + 2 + 1 = 255

128 + 64 + 32 + 16 + 8 + 4 + 2 + 1 = 255

128 + 64 + 32 + 16 + 8 + 4 + 2 + 1 = 255

       

      255      .        255      .         255      .          0

      

1111 1111 . 1111 1111 . 0000 0000 . 0000 0000

       

        8         +         8         +        0         +         0           = 16

128 + 64 + 32 + 16 + 8 + 4 + 2 + 1 = 255

128 + 64 + 32 + 16 + 8 + 4 + 2 + 1 = 255

       

      255      .        255      .          0        .        0

NETWORK PROTOCOL

 NETWORK PROTOCOL

class	Ip adress
A	1-126.(127.0.0.1-local host)
B	128 -191
C	192-223
D	224-239(multicasting)
E	240-255(quality of services)

Network component = Switch is a hardware which enables the distribution of data packets between computers on a network and is able to recognize the many layers of the network topology so that data packets can directly reach the destination.
Hub = Hub is a simple network device. Hub not keep the beam path dirangkaian data, so each packet of data through Hub will be sent (broadcast)
Device = term that refers to the components of the software tool that allows a computer system to communicate with a hardware.

FD=v4

      =ipv4 uses 32 bits (4 bytes) adress.

      =address space limits to (2^32) 4,294,967,296.

v6=ipv6 uses 128 bits (16-bytes) address.

USB Virus removal through command prompt

USB Virus removal through command prompt

It is possible to remove the USB Virus without using any antivirus software. Just follow the following steps for effective removal of virus from your USB drive.

1:Check Your USB Drive name (F:) .

2: Go to Start—-Run. Type cmd and hit enter. This will bring up the command prompt.

3: Type F: and hit enter, make sure have.this when you hit enter.

                                       
4:Type -r -a -s -h /s /d and hit enter to start.

5: That is Scanning please Wait.

6: after this is gone that is Scan done.

Thank and Good luck ^.^

STRAIGHT AND CROSS CABLE

Straight-Through Cable
In straight through cable the transmitting pair of wires are 1 and 2, the receiving pair of are wires 3 and 6. There are two major standards (ways) of using the colored wires, but important thing is, that the colors on the both ends of the cable are terminated identically. Please, look at the picture below.

Cross-over Cable
In the cross-over cable, the position of the wires is changed such that the sending pair is terminated at the receiving pair on the other side of the cable. It is illustrated below.

Straight cables are for connecting to a network jack in the wall or to a home router, or if you are trying to get on the internet period. A crossover cable is primarily used for networking two computers together to share files as a peer to peer. Also crossover cables can be used to chain two routers together.

But in simple english, use straight through or CAT-5 for basic networking stuff and Crossover cables for chaining up two devices to talk only to each other.

WHAT IS NETWORK ?

A network consists of two or more computers that are linked in order to share resources (such as printers and CD's), exchange files, or allow electronic communications. The computers on a network may be linked through cables, telephone lines, radio waves, satellites, or infrared light beams .

NETWORK PROTOCOL DEFINITIONS

A communications protocol is a system of digital message formats and rules for exchanging those messages in or between computing systems and in telecommunications. A protocol may have a formal description. Protocols may include signaling, authentication and error detection and correction capabilities.

NETWORK DEVICE DEFINITIONS

Any device that can support computer , communicate using Network Device e.g wireless , broadband , modem , networking cable and more .

NETWORK MEDIA DEFINITIONS

Computer networks can be classified according to the hardware and associated software technology that is used to interconnect the individual devices in the network, such as electrical cable (HomePNA,power line communication, G.hn), optical fiber, and radio waves (wireless LAN). In the OSI model, these are located at levels 1 and 2.