All language subtitles for Free-CCNA-FTP-TFTP-Day-43-CCNA-200-301-Complete-Course_en

Welcome to Jeremy’s IT Lab. This is a free,\xa0\n

videos, please subscribe to follow along with the\xa0\n

and share the video to help spread this\xa0\n

In this video we will cover\xa0\n

and TFTP, Trivial File Transfer Protocol.\xa0\xa0

As the names suggest, both of these protocols are\xa0\n

exam topic 4.9, which states that you must be\xa0\n

of TFTP and FTP in the network. So, make sure\xa0\n

and make sure you know the differences between\xa0\n

Here’s what we’ll cover in this video.\xa0\n

and TFTP. The names tell you what their basic\xa0\n

we’ll compare the two protocols to learn about\xa0\n

Then I’ll introduce the various file systems\xa0\n

files are stored on Cisco devices is important.\xa0\n

TFTP in Cisco IOS. As always, watch until\xa0\n

question from Boson Software’s ExSim for\xa0\n

Here’s a quick summary of FTP and TFTP. FTP,\xa0\n

and TFTP, which stands for Trivial File\xa0\n

standard protocols used to transfer files over\xa0\n

Clients can use FTP or TFTP to copy\xa0\n

They can also use FTP or TFTP to copy files to a\xa0\n

for FTP and TFTP is in the process of upgrading\xa0\n

You can use FTP or TFTP on the device to\xa0\n

reboot the device with the new IOS image. This is,\xa0\n

They can be used to transfer all kinds of\xa0\n

But for this video, we’ll use this example. So,\xa0\n

cables or anything, we don’t need any details. So,\xa0\n

network admin will download the new IOS image\xa0\n

to a server that is reachable by the device he\xa0\n

on the right. Finally, the network admin will\xa0\n

into the flash memory of R1. The last step after\xa0\n

So, later in this video I’ll show you how\xa0\n

files using FTP and TFTP, and then how to reboot\xa0\n

Okay, now let’s move on to talk about\xa0\n

TFTP was first standardized in 1981.\xa0\n

simpler I want to introduce it first. It was\xa0\n

because it is simple and has only basic\xa0\n

allows a client to copy a file to or from a\xa0\n

As I said, it was released after FTP, but it’s\xa0\n

tool to use when a lightweight, simple protocol\xa0\n

TFTP doesn’t use any authentication,\xa0\n

so servers will respond to all TFTP requests.\xa0\n

Also, there is no encryption so all data is\xa0\n

security, TFTP is best used in a controlled\xa0\n

You probably shouldn’t use it to transfer\xa0\n

TFTP servers listen on UDP port 69. So, when\xa0\n

they will use UDP port 69 as the destination port.\xa0\n

doesn’t provide reliability using retransmissions.\xa0\n

connection and reliability features within\xa0\n

First I’ll introduce how TFTP provides reliability\xa0\n

TFTP data message is acknowledged. So, if the\xa0\n

the server will send Ack messages,\xa0\n

However, if the server is transferring a file\xa0\n

messages, one for each data message from the\xa0\n

message isn’t received in time, the waiting\xa0\n

Let me demonstrate. The PC on the right is a\xa0\n

server. To download a file from the server,\xa0\n

The server then replies with a data\xa0\n

The client replies with an Ack, but for some\xa0\n

Because the client sent the Ack, it is waiting for\xa0\n

the client retransmits the Ack message, which\xa0\n

replies with the next data message, and the client\xa0\n

until the client has received the entire file.\xa0\n

The client and server alternately send a message\xa0\n

wait for a reply, etc. The server will never\xa0\n

except in the case of retransmission. So, this\xa0\n

forward acknowledgment and sliding\xa0\n

Next, let me introduce TFTP’s connections.\xa0\n

First, the connection phase. The\xa0\n

and the server responds back, initializing the\xa0\n

data and acknowledgment messages are exchanged.\xa0\n

is sent, terminating the connection. Let me\xa0\n

and the server replies by sending the first data\xa0\n

The client responds with an Ack, and there is an\xa0\n

including the first data packet, are the data\xa0\n

the client sends an Ack for the last data packet,\xa0\n

TFTP doesn’t use TCP, it does have a basic way of\xa0\n

Now I’m going to introduce an interesting part\xa0\n

have to know for the CCNA exam, I just thought it\xa0\n

As expected, when the client sends\xa0\n

the destination port is UDP port 69 and the source\xa0\n

port is called a ‘Transfer Identifier’, TID, and\xa0\n

However, here’s where the functionality\xa0\n

The server then also selects a random TID\xa0\n

It doesn’t use port 69 as the source port.\xa0\n

the destination port will be the server’s TID,\xa0\n

The client sends a message to the server with a\xa0\n

When the server replies, instead of using 69 as\xa0\n

the client replies, and uses that random port as\xa0\n

And the devices continue to use these two random\xa0\n

well-known port of 69 is only used in the very\xa0\n

I mentioned, this is beyond the scope of the CCNA,\xa0\n

Okay, so that was a brief overview of TFTP\xa0\n

Next I’ll introduce FTP and then we’ll compare\xa0\n

This is actually before TCP and\xa0\n

although it has of course been updated\xa0\n

instead of just a single well-known port. In\xa0\n

usernames and passwords are used for\xa0\n

there is no encryption. Everything is sent in\xa0\n

For greater security, FTPS, FTP over SSL/TLS,\xa0\n

FTP Secure. Another option is SSH File Transfer\xa0\n

FTP, adding greater security, whereas SFTP is a\xa0\n

FTP is more complex than TFTP and\xa0\n

but clients can also navigate file directories,\xa0\n

In TFTP, the client could only tell the server\xa0\n

it couldn’t even ask the server ‘what files do\xa0\n

the server to perform FTP’s functions.\xa0\n

and you can view a list of them here\xa0\n

As I said, FTP uses two different\xa0\n

That’s because FTP uses two types of connections.\xa0\n

is established and used to send FTP commands. The\xa0\n

action, such as retrieving a file from the server,\xa0\n

However, the actual data transfer isn’t\xa0\n

When files or data are to be transferred,\xa0\n

are established and terminated as needed. So, let\xa0\n

initiates the TCP connection, and the usual\xa0\n

Now the FTP control connection is established.\xa0\n

for example to say that the PC wants to get\xa0\n

acknowledge the command. But now we need an FTP\xa0\n

There are actually two different modes which\xa0\n

The default method of establishing FTP data\xa0\n

initiates the TCP connection. So, as you can see\xa0\n

SYN message, is from the server to the client.\xa0\n

and the data can be exchanged. So, the point I\xa0\n

the server initiates the data connection. Also,\xa0\n

throughout this whole process. It isn’t\xa0\n

So, active is considered the ‘normal’\xa0\n

However, notice the network has changed. The\xa0\n

mode, the client initiates the data connection.\xa0\n

a firewall, which could block the incoming\xa0\n

message in the TCP connection is initiated by the\xa0\n

but it would block the message if the server\xa0\n

Once the FTP data connection is established, the\xa0\n

to remember. Firewalls usually don’t permit\xa0\n

In this case, FTP passive mode is used and\xa0\n

initiates the TCP connection. By the way,\xa0\n

firewalls, consider studying for the CCNP security\xa0\n

Okay, that’s enough about FTP. FTP is more\xa0\n

time to really cover all there is to know\xa0\n

now. So let’s briefly compare FTP and TFTP. FTP\xa0\n

Port 20 is used for data connections, and\xa0\n

TFTP on the other hand uses UDP port\xa0\n

although there is a basic form of\xa0\n

FTP clients can use commands to perform various\xa0\n

clients can only copy files to or from the\xa0\n

FTP uses usernames and passwords to limit who\xa0\n

has no authentication system at all. So, FTP is\xa0\n

Okay, let’s move on to look at the IOS file\xa0\n

introduction, just this slide, but I want\xa0\n

at transferring files from TFTP and FTP servers\xa0\n

of controlling how data is stored and retrieved.\xa0\n

system. You can view the file systems of a Cisco\xa0\n

And here’s some sample output. Note that there\xa0\n

a few because the output was too long. And note\xa0\n

The disk type refers to storage devices such as\xa0\n

IOS file itself is stored. When the device boots\xa0\n

The opaque disk type is used for specific internal\xa0\n

systems, not actual separate storage devices. The\xa0\n

of the device. Normal RAM loses all of\xa0\n

However NVRAM does not. The startup-config file is\xa0\n

This represents external file systems, for\xa0\n

you’ll find any questions about these file\xa0\n

in the newest version of the CCNA. So, we’ll\xa0\n

look at how to use TFTP and FTP to transfer\xa0\n

So, here’s a very simple network we’ll use\xa0\n

router running Cisco IOS, and we have downloaded\xa0\n

is a server running both TFTP and FTP, and\xa0\n

version of IOS from SRV1 onto R1. First, you can\xa0\n

SHOW VERSION. Here you can see the image name,\xa0\n

supports cryptographic features like SSH. Then\xa0\n

video I’ll talk about the naming conventions of\xa0\n

output of SHOW VERSION is actually quite\xa0\n

By the way, for simplicity’s sake I’m actually\xa0\n

although usually I use GNS3. You can also\xa0\n

Here it is, and you can see the IOS image\xa0\n

TFTP to copy a new version of IOS from SRV1\xa0\n

with the new version of IOS, and then\xa0\n

And here’s how to copy the file using TFTP. The\xa0\n

destination. By using TFTP as the source,\xa0\n

a TFTP server. The router then asks you\xa0\n

This is where you enter the TFTP server’s IP\xa0\n

of the file you want to download. Note that you\xa0\n

of asking a server ‘what files do you have?’. I\xa0\n

so I entered it. Then you’re asked what name\xa0\n

You can just hit enter to accept the default name,\xa0\n

And that’s it, the file is then transferred\xa0\n

I used SHOW FLASH to check the contents of flash.\xa0\n

copied from the TFTP server. Now, how do we make\xa0\n

the old file? From global config mode, use the\xa0\n

Note that, if you don’t use this command\xa0\n

file it finds in flash. So, you should use this\xa0\n

After that, make sure you save the configuration\xa0\n

command won’t take effect. Then simply use\xa0\n

After the device finished restarting I used SHOW\xa0\n

and R1 is now using the new version, 15.5,\xa0\n

delete that old version of IOS. We don’t need it\xa0\n

The command to delete a file is\xa0\n

It asks you to confirm, so I did. And then I\xa0\n

and now the old file is gone.\xa0\n

to copy an IOS file to R1 from a TFTP server. We\xa0\n

and then reloaded R1. Finally, we deleted\xa0\n

Now let’s take a look at FTP. I’ll only show\xa0\n

server to the router, because the rest is\xa0\n

the other steps such as the BOOT SYSTEM command,\xa0\n

First, you should configure the username\xa0\n

connecting to an FTP server. Remember, FTP\xa0\n

So, this same username and password\xa0\n

In this case, I configured the username and\xa0\n

is basically the same. COPY FTP: FLASH:, and then\xa0\n

name, and the name you want to save the file\xa0\n

upgrade the IOS we could use the same BOOT SYSTEM\xa0\n

Okay, here are the commands we just used.\xa0\n

go back in the video to review. I\xa0\n

COPY command. This actually isn’t the first time\xa0\n

it as COPY RUNNING-CONFIG STARTUP-CONFIG, as a\xa0\n

It copies the source, the current running\xa0\n

Okay, before the quiz let’s review what we\xa0\n

Basically, they allow you to\xa0\n

over a network. Then I gave an overview of TFTP\xa0\n

and useful for quickly transferring\xa0\n

but has no advanced functionalities\xa0\n

FTP has much greater functionality, and includes\xa0\n

use FTPS, it has many other security benefits,\xa0\n

Then I very briefly introduced the file systems in\xa0\n

FTP to get a new IOS file from a server, and then\xa0\n

Once again, make sure to watch until the end\xa0\n

Software’s ExSim, the best practice exams for the\xa0\n

Which of the following\xa0\n

Select two. Pause the video\xa0\nnow to think about the answers.

The answers are B, FTP control\xa0\n

and D, FTP data connections use TCP port 20.\xa0\xa0

FTP uses TCP to provide reliable communications\xa0\n

control connection for sending FTP commands and\xa0\n

20 to establish data connections for the actual\xa0\n

Which of the following commands can be used to\xa0\n

to the local device’s flash storage? Pause\xa0\n

The answer is A, COPY TFTP: FLASH:. The command\xa0\n

so this copies a file from a TFTP server\xa0\n

R1 is behind a firewall and wants to\xa0\n

Which of the following statements is true?\xa0\n

The answer is C, R1 should use FTP\xa0\n

Active and passive mode only\xa0\n

because the client always initiates the control\xa0\n

the data connection. But in passive mode,\xa0\n

When a client is behind a firewall, passive mode\xa0\n

Which type of file system is used to store the\xa0\n

Pause the video now to think about the answer.

The answer is D, NVRAM. NVRAM, non-volatile\xa0\n

even after the device loses power. It\xa0\n

of the device. Okay, let’s go to question 5.

Which of the following functions\xa0\n

(select two). Pause the video\xa0\n

The answers are B, create a new directory on a\xa0\n

TFTP is very simple and only\xa0\n

to or from a server, it has no other functions.\xa0\n

a look at a bonus question from\xa0\n

Okay here's today's Boson ExSim practice\xa0\n

layer protocols use UDP for unsynchronized,\xa0\n

So, here are the choices. Pause the\xa0\n

Okay let's check. So, I think the correct answers\xa0\n

connectionless data transfer. Now, it says\xa0\n

some basic kind of connection\xa0\n

But it doesn't use TCP connections at Layer 4, so\xa0\n

Simple Network Management Protocol. As we covered\xa0\n

not TCP-based, it doesn't use TCP connections.\xa0\n

which we don't cover in the course, but that is\xa0\n

Okay, so I will click on show answer. And that\xa0\n

which just outlines the different protocols and\xa0\n

video now to read Boson's explanation. Okay, so\xa0\n

Software's ExSim for CCNA. These are without\xa0\n

So, if you want to get Boson ExSim, please\xa0\n

There are supplementary materials for this video.\xa0\xa0

There is a flashcard deck to\xa0\n

There will also be a packet tracer practice\xa0\n

That will be in the next video. Sign up for my\xa0\n

and I’ll send you all of the flashcards\xa0\n

Before finishing today’s video I want\xa0\n

To join, please click the ‘Join’ button under the\xa0\n

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