Question

7. What is the Exposed station problem (multiple answers)?

O a transmission problem that solved by the TCP/IP layer protocol
O a transmission problem that arises when a transmitting station is prevented from sending frames due to interhtrence with another transmitting station
O a transmission problem that occurs when two nodes waiting to transmit, each to a different target node, are aware of each other but not of the other's target
O a transmission problem that solved by the MAC (medium access control) layer protocol IEEE 802.11 RTS/CTS, with the condition that the stations are synchronized and frame sizes and data speed are the same

Answer 1

The Exposed Station Problem occurs in wireless networks when a node cannot determine if its transmission will interfere with others, leading to unnecessary delays. It is addressed by the MAC protocol, mainly by using a RTS/CTS handshake to minimize interference.

Step-by-step explanation:

The Exposed Station Problem is a situation in a wireless network where a node is prevented from sending data because it can perceive another transmission occurring, but does not have enough information to determine whether its own transmission will interfere with ongoing communications. The issue occurs in scenarios where two nodes are in range of a third node, but not of each other. When one node transmits to the third node, the other might also sense the channel as busy and thus withhold its transmission, even though its transmission would not cause any interference since it's communicating with a different node. This problem is typically addressed at the MAC (Medium Access Control) layer using protocols such as the IEEE 802.11 RTS/CTS (Request to Send/Clear to Send), which helps in minimizing the interference by using a handshake mechanism before data transmission.