Bandwidth, Basic Computer Science

Bandwidth:

Bandwidth is the second concept important for transmission. This concept can be explained with the help of the traffic network mentioned earlier. If there is a two-way street, consisting of two single lanes, one in each direction, only one line of vehicles can travel in each direction. On a superhighway, however, there may be three or four lanes in each direction; cars may travel along these lanes, in parallel, each at its own rate of speed. We have a wider  'band' of highway which can accommodate more cars traveling in the same direction at the same time. In the same way, the width of the electronic path determines how many cycles or bits can travel along this given path at any given time; the more bandwidth is available, the more bits may be transmitted, and the better the quality of transmission. In a simple telephone conversation, we use a bandwidth of about 3000 bits per second or 3 KHz . Television needs more bandwidth to accommodate audio and visual signals, and uses approximately 4,500,000 Hz or 4.5 MHz. 

Frequencies and bandwidth occur from low to very high along a continuous range of frequencies called the spectrum. To keep transmission from interfering with one another, each type (voice, radio, television, satellites, etc.) is allocated a bandwidth in this spectrum. Allocation is determined for any nation by its communications commission and internationally by the International Telecommunications Union (ITU) to avoid competition for the same bandwidths by different carriers and countries. 

When bandwidths are allocated°, sufficient extra space is provided between frequencies to prevent electronic interference in so far as possible. This safety precaution might not always work, when we hear or see overlap among radio broadcasts or television programs.  

Posted Date: 10/24/2012 5:04:44 AM | Location : United States







Related Discussions:- Bandwidth, Assignment Help, Ask Question on Bandwidth, Get Answer, Expert's Help, Bandwidth Discussions

Write discussion on Bandwidth
Your posts are moderated
Related Questions
Long term goal of artificial intelligence: This is not to be complex with the applications of AI programs to other sciences, discussed later. Rather, it is just pointing out th

Question 1 Write a note on modems Question 2 What are the Safe Chatting Rules Question 3 Explain three basic kinds of hypertext links Question 4 Write a no

SPECIAL-PURPOSE AND GENERAL-PURPOSE COMPUTERS In general, there are two types of digital computers. The first is the special-purpose digital computer, which performs a f

Question 1 Write a long note on the security features of Windows XP Question 2 Write a long note on computer peripherals, briefly describing some of the devices Question

Question 1 Write short note on                             1) NFS 2) CIFS Question 2 What is Virtual Application? Write down the benefits and drawbacks of it Questi

Consistency or data in DBMS Consistency - data in DBMS(Database) is accurate in modeling real world, follows integrity constraints User may ensure transaction consistent by itsel

Problem 1. Explain with diagram the internal components of ALU. Diagram Explaining Internal components 2. What is addressing mode? Explain any five addressing mo

what is input and output device? explain meaning of input and output devices


Electronic  transmission Frequency: Frequency is the rate at which a wave or cycle alternates between high and low (analog mode) or on and off (digital mode). For example, the