Peer to peer systems:- When any computer system in a network is directly connected to each other for

Peer to peer systems:- When any computer system in a network is directly connected to each other for
communication is called peer to peer system.
Clustered Systems :- Clustered system is grouped together multiple CPU to accomplish computational
work are divided provides high availability. Cluster system are divided into too parts :-
(1) Asymmetric clustering
(2) Symmetring clustering
In Asymmetric clustering the machine is running application in a active mode. If that server fails the
stand by host becomes the active server.
In symmertic mode too or more host are running applications and they are monitoring each other. this
mode is more efficient and use all available hardware.
(7) Real Time Systems :- In these systems computer must analyre the data and and possibly adgust
control to modify. The sensor input. Systems that control scientific experiments, medical imaging
system are know as real time systems.
Real time systems are the time defined constraints. Processing must be done in the defined constraints or
the system will fail.
Real time systems are divided into two parts :-
(1) Hard Real Time System
(2) Soft Real time System
Hard Real Time system guarantees that critical task be completed on time. In these system all the delays
must be bounded.
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Soft Real Time systems perform the task on the priority basis. Real time task gets priority over other
task and retains that priority until it completes.
(8) Hand held Systems :-
(1) These systems include the PDA’s (Personal digital assistants, like palm pilots or cellular phone
etc. with connectivity to network.
(2) These system have small amount of memory, include slow processors and small display screens.
(3) To include the fast processor in hand held device we would require a large battery that have to be
replaced frequently.
(4) Hand held devices may also use wireless technology like blue tooth etc.