Q1) Users are familiar with some network services like HTTP (Hypertext Transport Protocol) - Web; and SMTP (Simple Mail Transport Protocol) and POP (Post Office Protocol) - e-mail and instant messaging. But there are others like DHCP (Dynamic Host Configuration Protocol), DNS (Domain Name System), FTP (File Transport Protocol), NNTP (Network News Transport Protocol), Telnet, SSH (Secure Shell), SSL-TLS (Secure Sockets Layer-Transport Layer Security). How do they figure into organizational security? What are the most recent threats against them? Explain in 2-3 paragraphs.