it is application level traffic and it gives QoS guarantee.In CBR, source is expected to transmit packets at constant rate and all packets have constant sizes.
A bit rate is a transmission rate of binary symbols equal to the total number of bits transmitted in one second sent or received across a network or communications channel.
Constant bit rate (CBR)
bandwidth
Both are units of data transmission rates through a communication medium. Baud rate signifies symbol rate. How many symbol changes are transmitted per second. Symbols can contain one bit or more (e.g. 3-bit symbols). Bit is smallest unit in digital transmission or digital communication. Bit has only two states but symbols can have more than 2 states. So symbol may may represent more than one binary bit and so baud rate may or may not be equal to bit rate. Also see http://en.wikipedia.org/wiki/Bit_rate http://en.wikipedia.org/wiki/Baud - Neeraj Sharma
The bit error rate is a standard transmission-error rate of a medium such as copper wire, coaxial cable, or fiber-optic cable. Coaxial cables have a low error rate that is generally 1 in 1 billion bps.
Basically the baud rate can never be greater than the bit rate. Baud rate can only be equal or less than the bit rate. However, there are instances that baud rate maybe greater than the bit rate. In Return-to-zero or Manchester encoding, where there are two signaling elements, the baud rate is twice the bit rate and therefore requires more bandwidth.
bit rate is half the baud rate
Parallel data transmission is faster compared to serial data transmission. The speed of a parallel link is equal to the number of bits sent multiplied by the bit rate of each individual path.
Bit rate is related to the maximum frequency being sent over a channel; it is roughly twice this maximum frequency. Bit period is the time it takes to send a bit; it is 2/(bit rate).
In telecommunications, bit rate or data transfer rate is the average number of bits, characters, or blocks per unit time passing between equipment in a data transmission system. This is typically measured in multiples of the unit bit per second or byte per second. Gbps = gigabytes per second.
baud rate is the rate of symbol changes...symbol can be of 1 bit, 2 bit , 3 bit etc.... Where as frequency is the inverse of rate of lowest unit in a digital transimission...
Bit rate = 8 / (16 * 10-9) bits/second