A technique fulfills service requests in a system of computers that communicate
as nodes within a network. The technique involves sending, in response to an initial
service request that requests a service provided by a primary server node, a mobile
agent from the primary server node to an intermediate node. The mobile agent indicates
to the intermediate node that a secondary server node is capable of providing the
service. The technique further involves intercepting, at the intermediate node,
a subsequent service request sent from a client node to the primary server node,
the subsequent service request requesting the service, and sending an instruction
from the intermediate node to the secondary server node. The instruction instructs
the secondary server node to provide the service. The technique further includes
providing, in response to the instruction, the service from the secondary server
node to the client node.
