engineering recuitment NIC NIELIT Scientist B 2023 Mock Test Computer Networks Application Layer Protocols
Consider the following application layer services:
(a) Domain names to IP Address mapping
(b) Data Communication over World Wide Web
(c) Electronic mail transmission
(d) Retrieve e-mail from a remote server
(e) Transfer files from one host to another host
Which one of the following order of application layer protocols is correct for the above services?1
HTTP, FTP, POP, SMTP, DNS
2
DNS, HTTP, POP, SMTP, FTP
3
DNS, HTTP, SMTP, POP, FTP
4
DNS, FTP, SMTP, POP, FTP