Synchronous and transient

Synchronous and persistent

Nonblocking and transient

Synchronous and temporary

Security

Transaction

Message queuing

Concurrency

Persistent asynchronous communication

Receipt-based transient synchronous communication

Response-based transient synchronous communication

Multicast response synchronization

One message might be delivered to multiple recipients

Subscriptions may be conditional upon the content of the message

The broker is responsible for deciding which subscribers should receive the message

The sender specifies which recipients should receive the message

Client and server have different data representations

Client and server have to agree on the same encoding

Interpreting data and transforming it into machine dependent
representation

Generating stubs to interface with server side application

When the the temporal relationship between different data items is essential

When large blocks of data such as video files are involved

When reliable communication is not required

When buffering is not acceptable

The message is stored and the sender receives accepted acknowledgement immediatley

The message is stored and the sender receives accepted acknowledgement when the recipient starts

The sender is blocked until the receiver starts

The message is discarded and the sender is notified when the receiver starts

The message will not be received but the sender won't be blocked

The message will be queued until the receiver starts

The sender will automatically retry until receiver starts

The message will not be received and the sender will be blocked

Put, Get, Poll, Notify

Push, Get, Poll, Notify

Pop, Get, Poll, Subscribe

Put, Get, Notify, Acknowledge

To transform messages from sender's format to receive'’s format

To handle retries if a receiver fails to acknowledge the message

To manage who is authorized to subscribe to which queue

To balance messages between multiple storage queues

Application and transport

Transport and network

Application and network

Operating system and Network