Network transparencyonline transparency tool, network transparency
Network transparency in its most general sense refers to the ability of a protocol to transmit data over the network in a manner which is transparent invisible to those using the applications that are using the protocol
- 1 X Window
- 2 Databases
- 3 Firewalls
- 4 See also
- 5 References
The term is often partially correctly applied in the context of the X Window System, which is able to transmit graphical data over the network and integrate it seamlessly with applications running and displaying locally; however, certain extensions of the X Window System are not capable of working over the network1
In a centralized database system, the only available resource that needs to be shielded from the user is the data that is, the storage system In a distributed DBMS, a second resource needs to be managed in much the same manner: the network Preferably, the user should be protected from the network operational details Then there would be no difference between database applications that would run on the centralized database and those that would run on a distributed one This kind of transparency is referred to as network transparency or distribution transparency From a database management system DBMS perspective, distribution transparency requires that users do not have to specify where data is located
Some have separated distribution transparency into location transparency and naming transparency
Location transparency in commands used to perform a task is independent both of the locations of the data, and of the system on which an operation is carried out
Naming transparency means that a unique name is provided for each object in the database
FirewallseditSee also: Proxy server § Transparent proxy
Transparency in firewall technology can be defined at the networking IP or Internet layer or at the application layer
Transparency at the IP layer means the client targets the real IP address of the server If a connection is non-transparent, then the client targets an intermediate host address, which could be a proxy or a caching server IP layer transparency could be also defined from the point of server's view If the connection is transparent, the server sees the real client IP If it is non-transparent, the server sees the IP of the intermediate host
Transparency at the application layer means the client application uses the protocol in a different way An example of a transparent HTTP request for a server:GET / HTTP/11 Host: exampleorg Connection: Keep-Alive
An example non-transparent HTTP request for a proxy cache:GET http://foobar/ HTTP/11 Proxy-Connection: Keep-Alive
Application layer transparency is symmetric when the same working mode is used on both the sides The transparency is asymmetric when the firewall usually a proxy converts server type requests to proxy type or vice versa
Transparency at the IP layer does not mean automatically application layer transparency
- Data independence
- Replication transparency
- ^ "The Wayland Situation: Facts About X vs Wayland Phoronix" LWNnet 23 June 2013
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