56 Which layer is involved when an attacker sends a wireless deauthentication attack that disconnects the victim's computer from the network? Physical Data link Network Transport 57 What must a computer be connected to in order for a VLAN hopping attacker to join a network that would normally not be available? Access mode WAP3 WAP2 Trunk mode 58 Which type of encryption uses a single key to encrypt and decrypt information? Asymmetric encryption Symmetric encryption IPsec encryption Certificate-based encryption