[RouterOS Introduction - Protocols and Transport Layers] Which of the following services use TCP?
* DHCP
* SMTP
* HTTP
* TFTP
* FTP
Correct Answer: B
Services that use TCP:
* SMTP (Simple Mail Transfer Protocol) - TCP port 25
* HTTP (Hypertext Transfer Protocol) - TCP port 80
* FTP (File Transfer Protocol) - TCP ports 20 and 21
Services that use UDP:
* DHCP - UDP ports 67 (server), 68 (client)
* TFTP (Trivial File Transfer Protocol) - UDP port 69
MTCNA Course Material - Protocol Port Assignments:
"TCP-based services include FTP, HTTP, and SMTP. UDP-based services include TFTP, DHCP." Rene Meneses MTCNA Study Guide - Port Numbers and Transport Protocols:
"SMTP = TCP 25, HTTP = TCP 80, FTP = TCP 20/21. DHCP = UDP, TFTP = UDP." So, the correct TCP services are: 2 (SMTP), 3 (HTTP), and 5 (FTP).