Lecture 4- Communication
Distributed Systems

Outline
• Layered Communication Protocols
• Layered Protocols
• Types of Communication
• Remote Procedure Call
• Basic RPC Operation
• Parameter Passing
• Extended RPC Models
• Message-Oriented Communication
• Transient Messaging Models
• Persistent Messaging Model
• Stream-Oriented Communication
• Support for Continuous Media
• Streams and Quality of Service
• Stream Synchronization
• Multicast Communication
• Application Level Multicasting
• Epidemic-style Communication
• Summary
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Fig.
Layers,
Interfaces
and
Protocols
in
the
OSI
Model

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Marshaling is the process of transforming the memory representation of an
object to a data format

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Fig. Viewing middleware as an intermediate (distributed) service in application-level communication.

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Call-1
Call-2

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Jitter is the deviation from true periodicity of a presumed periodic signal
Isochronous transmission mode is particularly interesting for distributed multimedia
systems, as it plays a crucial role in representing audio and video.

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(Participants turnover)

Summary
• Layered Communication Protocols
• Layered Protocols
• Types of Communication
• Remote Procedure Call
• Basic RPC Operation
• Parameter Passing
• Extended RPC Models
• Message-Oriented Communication
• Transient Messaging Models
• Persistent Messaging Model
• Stream-Oriented Communication
• Support for Continuous Media
• Streams and Quality of Service
• Stream Synchronization
• Multicast Communication
• Application Level Multicasting
• Epidemic-style Communication
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