Cryptographic solutions: Steganography
Hide a file using OpenStego.
Wireshark: arp poisoning
Used Wireshark to capture packets and analyze whether ARP poisoning was occurring.
Managing users in active directory
Used Active Directory to unlock, disable, reset password, require password change at next logon, and change the name of user accounts.
lock/unlock users in linux
Locked and unlocked several user accounts in Linux.