DATA LINK LAYER

 DISCUSSION ON:

Framing (character and bit stuffing), Types of errors, error detection & correction methods; Flow
control; Protocols: Stop & Wait ARQ, Go-Back- N ARQ, Selective Repeat ARQ, HDLC, PPP, Media Access
Sub Layer: Pure ALOHA, Slotted ALOHA, CSMA, CSMA/CD, CSMA/CA, Token Ring; Reservation, Polling,
FDMA, TDMA, CDMA, Ethernet.

Comments

Post a Comment

Popular posts from this blog

DIGITAL TRANSMISSION

Image
                                                    DIGITAL TRANSMISSION * Data transmission and data reception is the transfer and reception of data over a point-to-point or point-to-multipoint communication channel. Examples of such channels are copper wires, optical fibers, wireless communication channels, storage media and computer buses.  * Digital transmission is employed in order to achieve high reliability and because the cost of digital switching systems is much lower than the cost of analog systems. *  For a computer to use the data, it must be in discrete digital form. Similar to data, signals can also be in analog and digital form. To transmit data digitally, it needs to be first converted to digital form.  * Digital Transmission is the transmission of signals that vary discretely with time between two values of some physical quantity, one value representing the binary number 0 and the other representing 1.  * There are two methods used to transmit data bet
Read more

TRANSMISSION MEDIUM

Image
 Discussion on: Bit Rate and Baud Rate, DIFFERENCES BETWEEN BIT RATE AND BAUD RATE Both Bit rate and Baud rate are used in data communication. Bit rate and Baud rate are related using this formula. Bit Rate = Baud rate x the number of bit per baud. It is "packing" 8 bits into each baud: 9600 bps = 1200 baud * 8 bits per baud  Bit rate is transmission of number of bits per second. It can be defined as per second travel number of bits. Baud rate is number of signal units per second. It can be defined as per second number of changes. Bit rate focusses on computer efficiency. Baud rate focusses on data transmission. Bit Rate = Baud rate x the number of bit per baud Baud Rate = Bit rate / the number of bit per baud The bit rate is expressed in the unit bit per second unit (symbol: bit/s), often in conjunction with an SI prefix such as kilo (1 kbit/s = 1,000 bit/s), mega (1 Mbit/s = 1,000 kbit/s), giga (1 Gbit/s = 1,000 Mbit/s) or tera (1 Tbit/s =
Read more