Default Ports

80 is http.

• Http is unencrypted.

If you sent credentials over 80, those could be intercepted and read in plain text by a malicious actor.

443 is https.

• Https is, by nature, encrypted using TLS/SSL.

If you sent credentials over 443, they could be intercepted but would not be able to be read as it would just be jumbled up text.

• That text cannot be deciphered without the private key.