The WMN consist of Mesh Routers (MRs) nodes and Mesh Clients (MCs) nodes. In WMN the MRs required more power and capacity to perform routing due to its more responsibilities. To perform additional functionality, they have multiple network interface cards (NICs) that connect with multiple wireless interfaces. The functions performed by traditional wireless routers can perform by these MRs with much low power consumption by using multi-hop environment. MRs can be implemented on basis of embedded systems and general-purpose computer systems.
Mesh clients (MCs) can also act as a router in WMN but they cannot act as gateway or bridge for the network. They have only one network interface card (NIC), because they interact with only one wireless interface. As compared to MRs, MCs have simpler structure and they have a variety of devices such as PDAs, laptops, desktop PC etc.The architecture model of WMN can be classified into three types [1, 2].