diff --git a/guide/english/computer-science/ports/index.md b/guide/english/computer-science/ports/index.md
index 95d8f252c5..ebe7e3a0cf 100644
--- a/guide/english/computer-science/ports/index.md
+++ b/guide/english/computer-science/ports/index.md
@@ -15,11 +15,14 @@ Some port numbers are used by convention to identify specific services, such as:
 * 25 - SMTP
 * 42 - nameserver
 * 53 - Domain Name System (DNS)
+* 69 - Trivial File Transfer Protocol (TFTP)
 * 80 - http
+* 88 - kerberos
 * 110 - pop3
 * 143 - imap
 * 194 - irc
-* 443 - https
+* 443 - https or http over SSL
+* 3389 - Remote Desktop Protocol (RDP)
 
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