FTP, SFTP, and TFTP

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来自 Google 的课程

System Administration and IT Infrastructure Services

1407 个评分

Google

System Administration and IT Infrastructure Services

1407 个评分

课程 4（共 5 门，Specialization Google IT Support Professional Certificate）

This course will transition you from working on a single computer to a whole fleet. Systems administration is the field of IT that’s responsible for maintaining reliable computers systems in a multi-user environment. In this course, you’ll learn about the infrastructure services that keep all organizations, big and small, up and running. You’ll learn how to manage and configure servers, how to use industry tools to manage computers, user information, and user productivity. Finally, you’ll learn how to recover your organization’s IT infrastructure in the event of a disaster. By the end of this course you’ll be able to: - utilize best practices for choosing hardware, vendors, and services for your organization. - understand how the most common infrastructure services that keep an organization running work and how to manage infrastructure servers. - manage an organization’s computers and users using the directory services, Active Directory, and OpenLDAP. - choose and manage the tools that your organization will use. - backup your organization’s data and be able to recover your IT infrastructure in the case of a disaster. - utilize systems administration knowledge to plan improve processes for IT environments. Except as otherwise noted, the contents on this site are licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

从本节课中

Network and Infrastructure Services

In the second week of this course, we'll learn about network and infrastructure services. We will cover what IT infrastructure services are and what their role is in system administration. We'll also learn about server operating systems, virtualization, network services, DNS for web services, and how to troubleshoot network services. By the end of this module, you will know the most common IT infrastructure services you'll encounter when handling system administration tasks.

FTP, SFTP, and TFTP3:02

Network Support Services Revisited1:59

DNS for Web Servers2:07

DNS for Internal Networks3:29

与讲师见面

Google

Now that we're a little more familiar with some of

the common aspects of physical infrastructure,

let's move onto network services.

A network service that's commonly used in organization is a file transfer service.

So why would you want to have a service dedicated to file transfer?

Well, sure, you could probably carry around a flash drive and copy files to

each machine you work on or even use a remote copy tools we learned in the last course,

or you could essentially store huge files and

transfer files from one computer to another using the Internet.

There are a few different file transfer protocol services that are used today.

Let's take a quick rundown of what's out there and what they do.

FTP, in the second course of this program the,

bits and bytes of computer networking,

we mentioned FTP a.k.a the file transfer protocol.

It's a legacy way to transfer files from one computer to another over the Internet,

and it's still in use today.

It's not a super secure way to transfer data because it doesn't handle data encryption.

The FTP service works much like RSH service.

Clients that want to access an FTP server have to install an FTP client.

On the FTP server,

we install the software that allows us to share information

located in the directory on that server.

FTP is primarily used today to share web content.

If you use a website host provider,

you might see that they have an FTP connection already available for

use so they can easily copy files to and from your web site.

SFTP, it's a secure version of FTP,

so it makes sense to choose this option over FTP.

During this SFTP process,

data is sent through SSH and is encrypted.

TFTP stands for trivial FTP.

It's a simpler way to transfer files than using FTP.

TFTP doesn't require user authentication like FTP,

so any files that you store here should be generic and not need to be secure.

A popular use of TFTP is to host installation files.

One method of booting a computer that we haven't discussed yet is PXE or PXE boot,

which stands for free boot execution.

This allows you to boot into a software that's available over the network.

A common use case for organization that want to install software over

a network is to keep operating system installation files in a TFTP server.

That way, when you perform a network boot,

you can be automatically launched into the installer.

This is a lot more efficient than having to carry

around a USB with an operating system image.

You can learn more about PXE boot in the next reading.

Depending on your usage of file transferring services,

you might want to weigh the option we mentioned.

We encourage you to read about popular FTP clients using the supplemental reading.

If you just want to share files between your computers in a secure way and have

a nice directory where you can access

all the shared files instead of transferring them to your machine,

you'll want to look at network file storage services instead.

We'll discuss those in the upcoming module.

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