Free CompTIA Network+ N10-008 Practice Question

A preshared key is used to establish a secure communication channel in wireless networks by providing a shared secret between the devices before communication begins. It is a form of symmetric encryption where the same key is used for both encrypting and decrypting the data. This key needs to be kept secret to maintain the security of the communication channel. Using other forms of authentication such as asymmetric keys or certificates would not be considered a 'preshared key'.