Asynchronous Transfer Mode (ATM) offers services to three different types of technologies: Constant...

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Asynchronous Transfer Mode (ATM) offers services to three different types of technologies: Constant Bit Rate (CBR), Unspecified Bit Rate (UBR) and Available Bit Rate (ABR). Each technology has its pros/cons when dealing with ATM.Submit a paper in which you examine UBR, CBR and ABR technologies in 2 Parts.Part (A) Choose one of these as the preferred method for transmitting data when bit-rate and minimum quality of service are top priorities and defend why this technology is the best of the three. (500 – 600 words)Part (B) Submit an essay in which you present an argument to refute your stance (a counter-argument) from discussion (Part A). Suggestions include worst-case scenarios, differing definitions of efficiency and technical issues. (500 – 600 words)
	
Document Preview: UBR, CBR, and ABRAsynchronous Transfer Mode (ATM) offers services to three different types of technologies: Constant Bit Rate (CBR), Unspecified Bit Rate (UBR) and Available Bit Rate (ABR). Each technology has its pros/cons when dealing with ATM.Submit a paper in which you examine UBR, CBR and ABR technologies in 2 Parts.Part (A)	Choose one of these as the preferred method for transmitting data when bit-rate and minimum quality of service are top priorities and defend why this technology is the best of the three. (500 – 600 words)Part (B)	Submit an essay in which you present an argument to refute your stance (a counter-argument) from discussion (Part A). Suggestions include worst-case scenarios, differing definitions of efficiency and technical issues. (500 – 600 words)Referencing guidelineNo wikis, no forums, Quora sitesWebsite from reputable sources allowedRequired to have at least 2 peer reviewed papers Citation style : Harvard-Coventry

Robert · Accepted Answer

Part A 
There are four Services classes are defined in Asynchronous Transfer Mode (ATM) to transfer 
bit stream. 
 CBR (Constant Bit Rate) 
 VBR (Variable Bit Rate) 
o VBR-NRT (Non-Real Time) 
o VBT-RT (Real Time) 
 UBR (Unspecified Bit Rate) 
All of these methods are used according to the priority pattern as defined below: 
CBR (Constant Bit Rate), where constant bit stream required in transmission and no delay is 
concerned whereas VBR (Variable Bit Rate) having different packets in size and in their timing. 
A transmission with variable bits in different frames. For example, a document that has to be 
transfer over a network can have different methods of compression and in different size. A time 
difference may not be concern in this type of transmission.  ABR (Available Bit Rate) is almost 
same as VBR, however minimum frame is defined fixed and entire frame used if no CBR and 
VBR transmission left. UBR (Unspecified Bit Rate) is on the other hand, is unspecified bit rate 
where jobs are not specified and prioritized. Adaption layer: AAL5  
AAL 5:  For data and support, connection oriented and connectionless data are used by primary 
AAL to transfer non SMDS data. Example for SMDS data such as LANE (Local Area Network 
Emulation) and Classical Internet Protocol (IP). Simple and Efficient Adaption layer is another 
name of AAL5. 
According to the priority pattern these service class use. According to the scenario where bit 
rate and minimum quality of service are the top priorities UBR (Unspecified Bit Rate) would be 
used. That would be the chosen as best in this scenario as it defines and design for those jobs 
where delay or cell loss is not crucial.

Asynchronous Transfer Mode (ATM) offers services to three different types of technologies: Constant Bit Rate (CBR), Unspecified Bit Rate (UBR) and Available Bit Rate (ABR). Each technology has its...

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