Which may be related to synchronous communication

[Timber Lee]

Which may be related to synchronous communication?
1.HTML
2.HTTP
3.HTTPS
4.SMTP
5.MOM

[Eduard Manas]

I'd say only HTTP and HTTPS. HTML and STMP are application level protocols, so nothing to do with communication protocols. MOM is related to asynchronous messaging, so also false.
Eduard

[Naichen Liu]

I wouldn't say HTML is a Protocol, it is a tag formatted message, you can use any protocol to transmit it, like you can see HTML in broswer by using HTTP, you can see it in your outlook email box by using SMTP.