Describe the hidden node problem in wireless LANs, and the medium access protoco

Question

Describe the hidden node problem in wireless LANs, and the medium access protocol used to access a Wi-Fi network. Let's assume that you have the following network architecture: Computer 1, has IP address IP1 and MAC address MAC1. It sends a packet to computer 2 with IP2 and MAC2. The computer is located in a different subnet, so the packet as crosses a gateway router, which has two interfaces (IP3, MAC3 and IP4, MAC4), as shown in figure. Describe the addressing used (IP and MAC addresses, source and destination addresses), when a) the packet is in the subnet 1 b) the packet is in the subnet 2 If your subnet mask is 255.255.252.0. a. How many devices/hosts can be supported on that subnet?

Explanation / Answer

Here as per the question,
Computer1(IP Address is IP1) wants to send data to Computer2(IP Address is IP2), then following will be the series of operation:

Now as per the question, here are the addressing used when:-

a) the packect is in the subnet 1

Packet will have destination MAC address of Router (S 2/1 Interface) and destination IP address of Computer2

i.e, MAC4 and IP2

b) the packect is in the subnet 2

Here packet will have destination MAC address of Computer2, destination IP address of Computer2 and source MAC address of Router(S 1/0 Interface).

i.e, MAC2, IP2 and MAC3

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