It had a huge impact people could use other things than bows and arrows to fight in wars.
Answer:
Dynamic Host Configuration Protocol (DHCP) enables users to dynamically and transparently assign reusable IP addresses to clients. ... Domain Name System (DNS) is the system in the Internet that maps names of objects (usually host names) into IP numbers or other resource record values.
Answer:
Social Engineering
Explanation:
Even if you invest in the best possible security infrastructure for your corporate network, you will still be vulnerable to attacks which exploit human shortcomings. An example is where an attacker manipulates a company employee to get the system access password in return for a favour. Now he can use the password to bypass all security infrastructure and gain access to critical data and code.