These may include: OSI Model layers Access lists Important tables such as powers of 2 (2^1 = 2; 2^2 = 4???2^8 = 256) Class A,B,C address range and properties e.g. Class A: Denoted by network.host.host.host; first octet is between 1 to 126; Important formulae such as 2^x-2 gives the number of hosts per subnet where x is the number of off bits in the subnet mask Binary to decimal conversion table