Question: (a) Why are there usually two protocols for each application? (b) In e-mail, distinguish between SNMP and POP. (c) Why are Telnet and FTP dangerous?

(a) Why are there usually two protocols for each application?
(b) In e-mail, distinguish between SNMP and POP.
(c) Why are Telnet and FTP dangerous?
(d) What secure protocol can be used instead of Telnet and FTP?
(e) What is the security standards situation in e-mail?

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