Lan type

-


 Ether lan- For lan or ethernet card

 (802 standard)

Token ring- there are one token that catch

data .

Token bus- here system connect physically

in bus format.but token pass in ring format.

FDDI- It is primary & secondary ring net work.data done by primary ring, secondary ring is used as back up.

ADVANTAGE- 1 Share device like printer or

faxes in a network.

2. communication & sharing data.

DISADVANTAGE- 1.Limited computer can be

connect in a lan.

2. Lan can not coverage large area.

Encoding- It converts the bitstream into a signal before it is transmitted.

TRANSMISSION RATE- This means speed is how many bits are transmitted in 1 second?

Transmission mode- Data transmission mode is done in 3 ways.

Simplex- In this mode, communication of data takes place from one side only. It has a one device Sender&The second device is the receiver.

Half duplex- Communication in this mode on both sides, but time is not the same.

Full duplex- Communication in this mode from both sides at the same time.

syncronigation- sender reciever data flow
same bit format.

Flow control- Here the speed of data is controlled by data link layer and if there is any problem in the speed of data, like the speed of sender is faster & a reciever device   has a low receiving This problem is then solved by flow control of the Between  2 computers.

Network layer: (1) logical addressing- by router.
Transport layer: (1) segement (2)Reassembly

Session layer: synchronization

presentation layer: (1) Encryption

Encryption: It allow the personalize data any person don't open  that data this layer decrypt of that data change of original form.

Application Layer : for mail.



Comments

Post a Comment

Popular posts from this blog

Bios setup

-
Image
                    Bios setup It is a plate form which is provide to make trigger of our system. all the hardware device attatch to our system we can enable& disable the work all these divice's & up ,&down the performance of these divice's when we go to in BIOS setup mostly we founde all these option, which is use to increase or decrease performance all attached hardware devices.so these option show in below manner. standard cmos setup- Enable the user to set basic information such as data time , IDE device disk drive. Advance setup- Sets advanced Information such as boot device  ' smart for harddisk boot up numlock, floppy drive swap about the system. power management system- Sets the parameters such as stand by time out , ring on power on for the system power management operation. PcI plug & play setup- Sets the parameters for the device installed on the pic bus & device which use the system plug & pl...
Read more

Topology

-
Image
  Topology - It is different configuration to connect all devices of network. Network - It is group of devices to connect by communication path in which exchange the information and share resources. STRUCTURE OF NETWORK - There are two types of network point-to-point network multipoint networks. Point to point network - Point to point network in this type network there are two devices connected to each other data flow in this type network, local network to remote network, ex- satellite ,television ,microwave. Multi point - In this type network multi-device share of network it is also called multi drop connection. Structure of Topology - 1.physical topology 2. logical topology. Pysical topologies - In this Type Topology, it reffer To Connect All Device Physically.it means the physical shape of network. Logical Topologies - The Network Create Different Type But Actually Work's Logically.( it's shape is different). Type of Topologies - Single node, Star bus, Ring, Mesh,...
Read more

Printer

-
Image
 The first electronic printer was the EP-101, invented by the Japanese company Epson and released in 1968.  so it was debuted in the market, The first commercial printers typically used mechanisms from electric typewriters and teletype machines. INTRODUCTION- The printer is an device that prints text document & image on paper. it is peripheral output device. IMPACT PRINTER- Printers are used for printing document  as well as graphics. the working of impact printer is very similer to that type of printer. lmpact printer are those printer, where physical contact is established between print head , cartridge&  media paper . the impact result in printing on paper under the ink ribbon. the dot matrix printer is an example of impact printer. DOT MATRIX PRINTER- Dot matrix printer uses a matrix of metal pins on the electromagnet printhead to creat dots & ink  soaked ribbon is placed between the paper & the print head . due to this dot matrix printer are...
Read more