CompTIA A+ 220-1201

Port Numbers

100

What are the port numbers that are currently associated with the FTP aka File Transfer Protocol?

what is tcp/20 and tcp/21

200

SSH (Secure Shell) provides a encrypted communication link across?

What is tcp/22

300

SMTP commonly uses port____ to be able to send email messages?

tcp/25

400

DNS commonly uses port?

udp/53

500

What two ports do DHCP commonly use?

udp/67 and udp/68

DNS configuration

100

____ determines the host name for the Mail server.

What is MX (Mail exchange record)

200

____ human readable tax information that can be used for verification purposes?

What is TXT (Text records)?

300

_____ Digitally sign domains outgoing mail validated by mail servers. 

What is DKIM (Domain Keys identified mail)