This paper presents the throughput characteristics for an All-WiMAX (AW) and a Hybrid Wi-Fi -WiMAX (HWW) video surveillance system with varying number of nodes, frame rate and MAC Service Data Unit (MSDU) size. An AW video surveillance system consists of WiMAX IP cameras connected directly to the Base stations while the HWW system consists of Wi-Fi IP cameras linked to the Customer Premises Equipment (CPE) which is equally linked to the base station. Local viewing PCs are connected at the CPE while remote viewing can be done via the internet. WiMAX and Wi-Fi IP cameras capture the video images; convert them to an appropriate digital signal and transmit them via Ethernet cables or wireless interface links. The investigation of the performance of the AW and HWW systems has been done by simulation of the systems using the OPNET modeler.Results show that, under similar conditions, the HWW video surveillance system outperforms the AW system in terms of throughput by a factor of 1.75. The results further show that throughput increases with increase in MSDU size and/or video resolutions, frame rate, number of nodes and decrease with increase in frame time, the reverse being true as well.

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This paper evaluates the performance of routing protocols such as OSPF, EIGRP and IS-IS in an enterprise network. Routing protocols are rules that govern the best route to transfer data between various nodes in networks. These rules are used in the transmission of information from the transmitting end to the receiving end. Routing protocol's main responsibility lies in determining the best way routers communicate with each other in order to forward any kind of network traffic using the optimal path. The evaluation of routing protocols was achieved by measuring packet end-to-end delay, packet delay variation, Jitter, Ethernet delay, traffic sent and received parameters by employing OPNET simulator software using Http, Video conferencing and Voice data types. The results shows that OSPF_IS-IS combined protocols outperforms the of OSPF_EIGRP and OSPF protocols by 60%.

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