Scalability of a network is the aspect which proves the competence of a network or a system to handle enlarged amount of demand without disturbing the existing users of the network.This paper simulated and evaluated the delay-awareness of networks scaled by incremental workloads. Five scenarios were created and analysed to identify the level of delay tolerance of the networks. The simulation and analysis were done using OPNET Modeler 14.5 to capture delay and traffic elements of the scenarios. Results showed that for the scalable network, using Ethernet 16 hub outperforms the use of Ethernet 16 bridge and Ethernet switch respectively for Indoor office network. Ethernet delay element results was 0.00015 seconds which is lower than 0.00025 seconds of other scenarios.