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We know that all processors share a common memory in shared memory model. Every processor, however, can be assigned a different part of the program stored in the memory to implement with the data stored in specified locations. Every processor does computation independently with the data allocated to them by the controlling program, called the main program. After completion their computations, all of these processors join the main program. The main program complete only after all child processes have been terminated completely. There are many alternatives to execute these ideas through high level programming. Some of them are:
i) Using heavy weight processes.
ii) Using threads.( e.g. Pthreads).
iii) Using a completely new programming language for parallel programming (e.g. Ada)
iv) Using library routines with an existing sequential programming language.
v) Modifying the syntax of an existing sequential programming language to produce a parallel programming language (e.g. UPC).
vi) Using an existing sequential programming language improves with the compiler directives for specifying parallelism (e.g. OpenMP).
We shall adopt the final alternative. We shall also give an introduction to the shared programming using library routines with an existing sequential programming language.
a) Consider a hypothetical arrangement of ‘self-learning' bridges shown in the figure below. Assuming all are initially empty, give the forwarding tables for each of the bridges B
A generic algorithm is mostly analyzed on the basis of the following parameters: the time complexity (implementation time) and the space complexity (amount of space necessary). Usu
Network Criteria - Performance - It is able to be measured by transit time and response time. Affected by type of medium, number of users and connected HW/SW - Reliability
how tcp is redefined for wireless network
What is workstation? A workstation is a node in network that is more useful and can occur local information processing or graphics processing. A workstation generally has an in
Two hosts are connected by a path made of four links as shown in the figure below. The links are of data rate R = 2 Mbps each. Host A has a file of size F = 1,000,000 bytes to tran
Some multiple WAN methods are defined below: ARPANET: It start in 1960's. It was operated by Advanced Research Project Agency, which is a company of US defense department.
Q. Explain about Multiplicative Decrease ? Multiplicative Decrease (MD) if a time-out take places the threshold is set to one maximum segment size (TCP Tahoe, TCP Reno).
Switches operate at layer 2. They enhance bandwidth by decreasing the number of devices sharing the media. They isolate collisions. Like a bridge they forward traffic based upon la
briefly explain how firewalls protect networks
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