A service is implemented by several servers. Explain why resources might be transferred between them. Would it be satisfactory for clients to multicast all requests to the group of servers as a way of achieving mobility transparency for clients?

What will be an ideal response?

Migration of resources (information objects) is performed: to reduce communication delays (place objects in a server that is on the same local network as their most frequent users); to balance the load of processing and or storage utilisation between different servers.

If all servers receive all requests, the communication load on the network is much increased and servers must do unnecessary work filtering out requests for objects that they do not hold.

Computer Science & Information Technology

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Indicate whether the statement is true or false.

Computer Science & Information Technology

Consider the following statements: string str1 = "Gone with the wind"; string str2;After the statement str2 = str1.substr(5,4); executes, the value of str2 is "____".

A. Gone B. with C. the D. wind

Computer Science & Information Technology