21) How do you stop users from using their own crontab
22) Show a crontab entry that will run '/usr/local/bin/myscript' on the first Monday of each month?
23) Can you explain what a context switch is?
24) Given a network of 192.168.7.0 and a netmask of 255.255.255.192, answer the following:
a) How many IP addresses are available for hosts?
b) What is the broadcast address?
c) How would this be written in CIDR notation?
d) I decide to split this subnet by odd and even numbered IP addresses, how would I achieve this?