Which of the Following Two Protocols Can Be Used to Manage Your Incoming Email?
Which of the following protocols can be used past 2 emails servers to both send and receive email?
- POP3
- IMAP4
- SMTP
- HTTPS
EXPLANATION
What Is IMAP?
IMAP(Net Message Access Protocol) is the protocol used by the vast majority of consumer email accounts. With IMAP, emails are stored on an Internet server. When a user accesses their business relationship, they're continued to the external server, and information is transferred from the server to their local car – which itself doesn't really receive any e-mail messages.
One of the key advantages of IMAP – aside from remote access – is that it allows a single account to be operated and managed by multiple users, without the need for a circuitous workaround. It can also put a fair amount of strain on your mail server, if your business organization manages its own email service.
In order for IMAP to function, it requires one of ii ports to exist open:
- Port 143: The default IMAP port; this allows the protocol to listen for incoming requests to synchronize emails. Traffic through this port is unencrypted.
- Port 993:Used for IMAP over SSL.
What Is POP3?
Dissimilar IMAP, POP3 (Mail service Office Protocol 3) downloads letters from a mail service service to a user's local computer. This allows the user to non only receive emails on their own machine, but also to disconnect from the Net and retain access to all of their messages. In that location are a number of advantages to this approach.
First and foremost, unless you're opting to leave a copy of each electronic mail on the mail server, it clears up a significant amount of infinite by storing all files on the user's local car. This makes it much easier to back upwards one'due south email messages, in addition to making search and organization far more efficient.
Unfortunately, POP3 isn't without its weaknesses either. The protocol past default assumes that only a single user will be accessing a particular email account, meaning that you lot'll need a workaround if yous want multiple users on a unmarried email. In add-on, remote access can be something of a problem. Finally, the fact that about Popular services delete downloaded emails from the server past default makes it incredibly hard to synchronize an account to multiple machines.
POP3 requires one of the following 2 ports to be open:
- Port 110: For unencrypted POP3 access; this is the default listening/communications port.
- Port 995:Used for encrypted POP3 connections.
Which One Should You Employ?
And at present for the one thousand thousand dollar question…which of the ii protocols should your business use?
The short answer is IMAP. Given the wealth of dissimilar devices typically used by modernistic employees, the capacity to remotely admission 1's email regardless of location is absolutely essential. The longer answer is that – as ever – it depends entirely on what you need email for.
The truth is, there's actually null stopping y'all from using multiple protocols to admission an email account – the technology does be to practice so, after all.
Sending Email: SMTP And HTTP
What Is SMTP?
At present, though there are two protocols associated with receiving emails, there's really only one associated with sending them. SMTP(Simple Post Transfer Protocol) is the gold standard for passing e-mail letters from one mail server to some other. Every email service uses some variation of this protocol.
There'southward 1 more divergence between SMTP and IMAP/POP3: unlike the latter 2, it requires no authentication to function. Although modernistic SMTP applications restrict relaying, this nonetheless allows for a fair volume of spam to exist on the web; some tech-savvy criminals tin can even send emails using another'south account.
There are two ports you'll need to be aware of for SMTP:
- Port 25: This is the default SMTP port. Information technology is not encrypted.
- Port 465 / 587: The default port for using SMTP through SSL.
In improver, some hosts may offering a secondary port as an alternative to clients for whom port 25 is filtered.
What Does HTTP Have To Exercise With Emails?
Now, granted, I'g certain a few of you are at least a niggling surprised to see HTTP (Hyper Text Transfer Protocol) included on this list. Afterwards all, it's non really involved in the process of sending or receiving an email, nor does it directly interact with whatever of the other mail protocols. So…what does it take to do with electronic mail, exactly?
Easy – HTTP (and its more secure cousin, HTTPS) is the means by which you're probably going to access your mailbox, particularly if you're using a web-based email service like Hotmail or Gmail. For that reason, information technology actually occupies a fairly important position in the m scheme of things, even if it's not technically a mail protocol itself.
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Source: https://quiz.techlanda.com/2019/08/which-of-following-protocols-can-be.html
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