Activity 1: Investigating Multiple Access Control Protocols We use different medium access protocols in data link layer to enable packet transmission in a link with a given medium. We use WiFi on daily basis. In WiFi, we have a shared medium (wireless) to send packets that are generating in the host devices. 1. Let's do a small role play to understand the MAC protocol. Assume that your group forms a Wireless LAN (WLAN) that uses Wi-Fi technology (has a wireless access point (AP) and three wireless devices that connect to Wi-Fi AP). One member can be the Wi-Fi AP and other members are the hosts (could be laptops, smart watches, smart phones, etc.). Assume all the devices in the network would like to send packets to Internet simultaneously. For example, when you need to send a packet, you can say "I'm sending a packet". If another group member said the same thing at the same time, then a collision occurred, and both need to retransmit packets. Your group needs to act as Wireless LAN and provide a mechanism to enable successful packet transmission. Demonstrate the protocol that you have designed in a timing diagram (Shows in Figure 1). You are not required to replicate the exact protocol used in WiFi. You can design your own protocol based on random access that allows hosts to communicate with WiFi AP with minimal collisions and act fast in case of a packet collision. WiFi AP Host A Checking whether the link is idle Host B Host C. Figure 1: Timing Diagram of the Protocol