Software Services

What are the 3 major software services?

1. Communication services 2. Security services 3. User productivity services

What are a couple of reasons why you might want to use POP3 to get your email?

1. If you need to keep your email storage under a certain quota, POP3 is a good way to maintain that storage limitation. 2. Privacy; Your email can only be seen from your local device.

What are some methods of instant communication in a business setting?

1. Internet Relay Chat 2. Paid-for options

What are the three most common email protocols?

1. POP3 2. IMAP 3. SMTP

What are two ways to set up email for a company?

1. To run your own managed server. 2. To use an email service provider.

Digital certificate

A notice that guarantees a user or a website is legitimate.

Transport Layer Security (TLS)

A protocol for managing the security of message transmissions on the Internet.

Internet Message Access Protocol (IMAP)

A protocol that allows you to download emails from your email server onto multiple devices.

Internet Relay Chat (IRC)

A protocol that's used for chat messages.

Certificate Authority (CA)

A trusted third-party agency that is responsible for issuing digital certificates.

What do email service providers do?

Allow you to create email inboxes and more by paying a monthly fee for every user in your organization.

Post Office Protocol version 3 (POP3)

An email protocol that downloads email from an email server onto your local device. It then delete the email from the email server.

Extensible Messaging and Presence Protocol (XMPP)

An open source communication protocol used in instant messaging applications and social networking services as well as Internet of Things applications, among other things.

Open IM protocols

Communication protocols that are widely used and integrated into different communication applications.

Why is email service critical for any organization?

Companies need to be able to contact clients and business partners and communicate internally.

True or False: Security is an integral part of IT, and is just the responsibility of security engineers.

False; Everyone should be thinking about security. And all layers of your infrastructure should have a layer of security built upon them.

True or False: Commercial-use and personal-use software licenses are essentially the same thing.

False; Most software distributors have separate agreements for businesses.

True or False: TLS is only used for web browsing.

False; TLS is widely used to keep web browsing secure, but it can be used in a lot of other applications as well.

What is HTTPS also referred to as?

HTTP over TLS or HTTP over SSL

What are some popular paid for options of instant communication that offer enterprise support?

HipChat and Slack

Which email protocol is one of the most popular ways to retrieve email?

IMAP

Why might you want to consider using POP2 over something like IMAP?

If storage limitations and security are a concern for you.

When managing an IT infrastructure, what should be one of the communication services that you consider implementing for your organization?

Instant communication

What is a fantastic tool you can use to promote team collaboration and efficiency?

Instant communications

Where does IMAP keep your messages?

On the email server.

What is the difference between POP3 and IMAP?

POP3 can only download email to one local device while IMAP can download emails onto multiple devices.

What are a few popular and free applications that use XMPP?

Pidgin and Adium

Secure Socket Layer (SSL)

Protocol used as a way of securing communication between a web server and client.

HTTP (Hypertext Transfer Protocol)

Protocol used to format and transfer web content around the Internet.

Platform services

Provide a platform for developers to code, build, and manage software applications.

When considering software licenses for your company, what is important to do?

Review the terms and agreement, then move forward with whatever option works best for your company.

While POP3, IMAP, and other protocols can be used to retrieve email, what is really the only one email protocol for sending email?

SMTP

Why has SSL been deprecated in favor of TLS?

SSL is pretty old and insecure.

HTTPS (Hypertext Transfer Protocol Secure)

Secure version of HTTP that makes sure the communication your web browser has with the website is secured through encryption.

Security services

Services that add a layer of security protection to our IT infrastructure.

Communication services

Services that enable employees in a company to talk to one another.

Why would a developer use platform services?

So they don't have to deal with OS maintenance and other services that are needed to use for the platform tools.

What kind of software might you need to get your users, depending on the organization?

Software development programs, word processing, graphical editors, finance software, and so on.

What is the one thing to keep in mind no matter which method you use to provide software for your business?

Software used as a consumer won't be the same as software used as a business.

Which protocol is the most popular way to keep communications secure over a network?

TLS

What are the differences between TLS and SSL?

TLS is the successor to SSL and is more secure than SSL.

If SSL version 3.0 was essentially TLS version 1.0, why would you use TLS instead of SSL?

TLS's new features and updates have made it more secure than SSL.

What does the license agreement usually say when using open source software?

That it's free to use, share, and modify.

What might the license agreement say when using software as a consumer?

That only a specific person can use the software.

If you ever manage a web server that serves content to other users, what do you want to let them know?

That when they access your website, you're keeping their interaction with you as secure as possible.

Simple Mail Transfer Protocol (SMTP)

The Internet standard protocol for sending e-mail messages from one computer to another.

Whether you choose to setup your own email server or use an email service provider, what will you have to understand?

The differences between email protocols when you setup your email accounts.

Software services

The services that employees use that allow them to do their daily job functions.

In any organization, what is the software that an IT support specialist managing IT infrastructure needs to provide?

The software that employees need to do their job.

Why is HTTPS also referred to as HTTP over TLS or HTTP over SSL?

This is because there are two protocols that enable us to make our web servers secure.

What does using an email service provider like Google Suite do?

This ties you into the Gmail webmail client, and allows you to access your email from anywhere, as long as you're connected to the Internet.

True or False: If you want to retrieve your email through POP3, you can only view it from one device.

True

True or False: In a business or commercial setting, most software distributors will have a separate license agreement than consumers.

True

True or False: SSL version 3.0 was essentially TLS version 1.0.

True

There are different DNS records. If the A record is used for hostnames, what is used for email servers?

We use MX for the mail exchange record.

What applications are included in software services?

Word processors, Internet browsers, email clients, chat clients, and so on.

How do software license agreements work in a business or commercial setting, in most cases?

You can buy ten licenses and any ten people in your company can use it. If someone leaves the company or doesn't need the software anymore, you can take their license and give it to someone else in the company.

Why can email server setup be one of the most complicated service to setup for a sysadmin?

You have to get the email to actually work, protect your email addresses from spam, filter out viruses and more.

How might you see SSL being used today and why?

You may still see it today being used over the TLS protocol like SSL/TLS. The two protocols are often used interchangeably.

Why do software licenses get a little more complicated when it comes to cloud software services?

You might have to deal with some of the same stipulations and also think through whether to purchase added features for businesses and enterprises, like dedicated customer support.

If you're managing an organization's website on a server, how do you enable TLS on the server so that the site can be using HTTPS?

You need to get a digital certificate of trust from a certificate authority. You can then install the certificate on your web server. That way, when users visit your site, they'll see the HTTPS in the URL instead of just HTTP.

What do you need to have to configure email services for your company?

You need to have a domain name set up for your company that you can use as your email domain.

How do you set up email for a company by running your own managed server?

You set up the email service software on a server, then you create a DNS record for your mail server.

Because SMTP is generally used to send messages from a mail client to a mail server, what should you specify when configuring an email application?

You should specify both the POP or IMAP server and the SMTP server.