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Q. Explain physical layer of Osi reference model?
- The physical layer deals among the physical characteristics of the transmission medium.
- It defines the mechanical, electrical, procedural and functional specifications for maintaining, activating and deactivating the physical link between end systems.
- Such characteristics like timing of voltage changes, voltage levels, physical data rates, maximum transmission distances, physical connectors and other similar attributes are defined by physical layer specifications.
- Instances RJ45, EIA/TIA-232 and NRZ
What is the Frame relay, in which layer it comes? Ans) Frame relay is an industry standard, shared access, switched Data Link Layer encapsulation that services many virtual circ
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Name some common or popular databases Many of the popular databases also provide support of and to the middleware and consequently, the term middleware has become lesser known.
Q. Applications of networks? End systems (hosts): - Run application programs - Example email, Web - At -edge of network Client/server model - Client host
RIP timers
conversion
What common software problems can lead to network defects? Software related problems can be any or a combination of the following: - Client server problems - Application
What is OLTP? In the transaction server, the client component usually contains GUI and the server components usually having of SQL transactions against a database. These applic
Path Overhead It is part of SPE and contain followings information: Performance monitor of synchronous transport , signal , path , track ,parity ,checks, and path status.
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