Pratique du Shadowing: FREE CCNA Lab 001: Basic Router Security Configuration 1 - Apprendre l'anglais à l'oral avec la vidéo
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Welcome to this free Cisco CCNA Packet Tracer Practice Lab.
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You can download the lab file from the link in the description.
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See if you can complete the lab yourself first, and then continue watching this video if you have any trouble,
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or watch it afterwards to check your solution.
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In this lab, we will be working with two routers, R1 and R2.
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We will configure basic security on the routers by using the enable password, which is used to enter privileged exec mode,
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also known as enable mode.
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I will only work with one of the routers in this video for the sake of time,
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but I highly recommend that you perform the configurations on both of the routers for practice.
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Repetition is essential to become familiar with the command Handline Interface or CLI.
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Step 1 is to connect the two routers by their Gigabit Ethernet 00 interfaces.
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I will refer to these as the Gig00 interfaces.
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Click on Connections in the bottom left and select the cable.
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Connect it to the Gig00 interface on R1 and then R2.
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There we have it!
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Step 1 is complete.
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Step 2 is to set the host names according to the network diagram, that is to R1 and R2.
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Click on each router and then select CLI to access the command line interface from which we will configure each router.
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The current hostname for each router is displayed here.
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As you can see, each router is currently named Router.
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To change the hostname of a router, we must enter
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Global Configuration mode, however to get there we must first enter
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Privileged Exec mode.
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This is achieved by using the Enable command.
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To demonstrate a shortcut, I will use the exit command to return to the previous exec mode.
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Notice that you can enter privileged exec mode by simply typing en.
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You can also type en and then use tab to autocomplete it to enable, but this isn't necessary, en alone is fine.
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E, however, is too short, and we are told this is an ambiguous command.
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This is because there are other potential commands that begin with E, which we can see by typing E and then a question mark.
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As you can see, there are two potential commands, enable and exit.
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So if you just enter E, the router doesn't know which command you mean.
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However, enable is the only command beginning with en, so en is all the router needs to know which command you mean.
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Now that we are in privileged exec mode, we can use the configure terminal command to get to global configuration mode.
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If you want to use shortcuts again as we did with enable and en, the shortest version of the configure terminal command is conf t.
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From here we can set the hostname of the router.
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This is done with the hostname command.
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I will enter hostname R1.
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As you can see, the hostname has changed from router to R1.
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Change the hostname on R2 as well, and then step 2 is complete.
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Step 3 is to set the enable password on each router to Cisco.
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The enable password is used to enter privileged exec mode, which as I mentioned before is also called enable mode.
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Previously we had no password set, so we were able to enter privileged exec mode without any password.
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Now we are going to protect privileged exec mode so that only administrators can access it.
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The command is simple, and it is done in global configuration mode, which we are already in.
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Type enable password cisco.
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That's it.
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Now let's test it out.
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From here I will use the exit command twice.
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Once to bring me back to privileged exec mode, and then once again to bring me back to exec mode.
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Now I will use the enable command again.
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However, this time I am asked for a password.
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The characters do not appear as I type.
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However, if I type the password Cisco correctly and press enter, I am brought to privileged exec mode.
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Now let's see what happens if I fail to enter the correct password.
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I enter the wrong password once, twice, and then three times before being rejected for having bad secrets.
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Now I will try again with the correct password, and I'm in.
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Step 3 is now complete.
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Step 4 is simply to view the password in the running configuration.
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The running configuration is the current configuration of the router, whether or not you have actually saved it.
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If you turn off the router without saving the running configuration, you will lose any changes.
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If you want to keep your changes, you will save them to what's called the startup configuration.
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That will be for another lab.
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To view the running configuration, use the show running config command from privileged exec mode, which we are already in.
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You can abbreviate it to, for example, shrun.
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Enter the command, and you can see the password right here, with the exact command we used before, enable password cisco.
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Step 4 asks if the password is encrypted, meaning translated into an unreadable code,
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to protect it from being discovered by people who should not know the password.
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As you can see it is not encrypted, it is written in clear text right here,
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Cisco, so the answer is no. Step 4 is now complete.
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Step 5 is to enable password encryption on the router.
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We can protect passwords by encrypting them to render them unreadable.
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This is done from global configuration mode with the command service password hyphen encryption.
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I will enter the command and now step 5 is complete.
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Step 6 is to once again view the running config.
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I will use the same command as before, and now let's check the password.
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However, the command doesn't work.
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That is because we are currently in global configuration mode, and showrunnconfig must be entered from privileged exec mode.
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Now, I could type exit to drop back to privileged exec mode, and then enter the command.
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But there is one more way.
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If I type do in front of the command, I can enter it from global configuration mode.
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Do show running config.
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There we go.
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Let's look at the password.
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You can see here enable password followed by a 7 and then a string of other numbers.
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The password has successfully been encrypted.
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Although we didn't type this 7 when we entered the command, it refers to the type of encryption used.
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There are other types as well, but that's not something to worry about now.
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The string of numbers that follow are the password Cisco, encrypted to be unreadable, so that anyone looking over our shoulder can't read the password.
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Keep in mind that the encryption used in the Service Password Encryption command isn't very secure and can be cracked,
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but this at least renders the password safe from someone simply glancing over your shoulder.
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Step 6 is complete.
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Step 7 is to disable password encryption.
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We enabled password encryption with the Service Password Encryption command.
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Now we will simply type no, followed by the same command.
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No Service Password Encryption.
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That's it.
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Step 7 is now complete.
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Step 8 is once again to view the password in the running configuration.
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This time I'll exit down to privileged exec mode and type show running config to view the running configuration.
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As you can see, the password is still encrypted.
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Why is that, even though we disabled password encryption?
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Well, disabling password encryption will prevent future passwords from being encrypted.
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However, it does not unencrypt passwords that are already encrypted.
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So the answer to step 8 is yes, the password is encrypted.
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Step 8 and the lab are both now complete.
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If you want to support my channel, I accept Bitcoin donations via the address in the description.
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I am also a Brave verified publisher and accept BAT donations in the Brave browser.
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Thank you.
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Vocabulaire et conseils d’expression pour cette leçon
Cette leçon d’expression orale s’appuie sur la vidéo « FREE CCNA Lab 001: Basic Router Security Configuration 1 ». Les mots qui reviennent le plus souvent : password, command, mode, router, step. Cette vidéo contient 108 phrases et 1307 mots à répéter en shadowing. La partie parlée dure 9:58. Le locuteur parle à un rythme régulier d’environ 131 mots par minute, confortable pour le shadowing. Seuls 78 % des mots font partie des 3 000 mots les plus courants en anglais, le vocabulaire est donc exigeant.
Vocabulaire clé de cette vidéo
15 mots de la vidéo à retenir, avec leur prononciation et leur sens :
| Mot | Prononciation | Sens |
|---|---|---|
| password nom | /ˈpæs.wɜɹd/ | mot de passe, mot d'ordre |
| enable verbe | /ɪˈneɪ.bəl/ | autoriser, permettre |
| configuration nom | /kənˌfɪɡ.əˈɹeɪ̯.ʃən/ | configuration |
| privilege nom | /ˈpɹɪv.(ɪ.)lɪd͡ʒ/ | privilège |
| encryption nom | /ɪnˈkɹɪpʃən/ | chiffrement |
| exit nom | /ˈɛɡzət/ | sortie |
| interface nom | /ˈɪn(t)ɚˌfeɪs/ | interface |
| disable verbe | /dɪsˈeɪbəl/ | désactiver, empêcher |
| refer verbe | /ɹɪˈfɜː/ | référer |
| select verbe | /sɪˈlɛkt/ | choisir, sélectionner |
| string nom | /stɹɪŋ/ | corde |
| connect verbe | /kəˈnɛkt/ | accoupler, connecter |
| terminal nom | /ˈtɚmɪnəl/ | terminal, aérogare |
| donation nom | /doʊˈneɪʃən/ | donation, don |
| render verbe | /ˈɹɛn.dɚ/ | rendre |
Les verbes à particule que vous entendrez
| Mot | Sens |
|---|---|
| turn off verbe | éteindre |
La grammaire de cette vidéo
Les structures que le locuteur utilise le plus, avec les mots exacts de la vidéo :
| Structure | Dans la vidéo |
|---|---|
| Voix passive be + participe passé — l’accent est mis sur ce qui arrive, pas sur qui le fait | is displayed · is achieved · are told |
| Present perfect have/has + participe passé — une action passée qui compte encore maintenant | has changed · have actually saved |
| Propositions relatives who / which + proposition — une précision sur une personne ou une chose | password, which is · people who should |
Prononciation à surveiller
Le locuteur utilise 8 contractions et formes réduites, comme doesn't, isn't, can't. Prononcez-les sous leur forme courte, telles que vous les entendez.
- Les sons « sh » et « zh »: configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/, encryption /ɪnˈkɹɪpʃən/, donation /doʊˈneɪʃən/, publisher /ˈpʌblɪʃɚ/, shortcut /ˈʃɔːtkʌt/
- Mots longs — placez bien l’accent: configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/, successfully /səkˈsɛs.fə.li/, administrator /ədˈmɪn.ɪ.stɹeɪ.tɚ/, ambiguous /æmˈbɪɡ.ju.əs/, abbreviate /əˈbɹi.vi.eɪt/
Les sons difficiles pour les francophones :
- /r/ anglais — langue recourbée, sans frotter la gorge: password /ˈpæs.wɜɹd/, configuration /kənˌfɪɡ.əˈɹeɪ̯.ʃən/, privilege /ˈpɹɪv.(ɪ.)lɪd͡ʒ/, encryption /ɪnˈkɹɪpʃən/, refer /ɹɪˈfɜː/
Comment s’entraîner avec cette vidéo
- Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
- Répétez phrase par phrase à vitesse normale, en reprenant chacune jusqu’à ce que votre rythme corresponde à celui du locuteur.
- Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme password, enable, configuration.
Qu'est-ce que la technique du Shadowing ?
Le Shadowing est une technique d'apprentissage des langues fondée sur la science, développée à l'origine pour la formation des interprètes professionnels. Le principe est simple mais puissant : vous écoutez de l'anglais natif et le répétez immédiatement à voix haute — comme une ombre suivant le locuteur avec un décalage de 1 à 2 secondes. Les recherches montrent une amélioration significative de la précision de la prononciation, de l'intonation, du rythme, des liaisons, de la compréhension orale et de la fluidité.