Question

You're configuring a firewall to allow access to a server hosted on your network's screened subnet. You open TCP/IP ports 80, 25, 110, and 143. Assuming that no other ports on the firewall need to be configured to provide access, which applications are MOST LIKELY to be hosted on the server?

a) Web server, SMTP, POP3, IMAP
b) FTP server, DNS, SNMP, HTTPS
c) Telnet, DHCP, NTP, LDAP
d) SSH, RDP, SIP, SNMP

Answer 1

The applications MOST LIKELY to be hosted on the server are a web server, an email server that supports both SMTP and POP3, and an email server that supports IMAP.

Step-by-step explanation:

The correct answer is a) Web server, SMTP, POP3, IMAP.

TCP/IP ports 80 is used for HTTP, which is the protocol used for web servers. Port 25 is used for SMTP, which is used for sending emails. Port 110 is used for POP3, which is used for retrieving emails. Port 143 is used for IMAP, which is also used for retrieving emails.

Therefore, the applications MOST LIKELY to be hosted on the server are a web server, an email server that supports both SMTP and POP3, and an email server that supports IMAP.