Pratique du Shadowing: DNS Explained in 100 Seconds - Apprendre l'anglais à l'oral avec la vidéo
Création de la leçon...
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The Domain Name System, or DNS, is like the phonebook of the internet.
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It maps human-readable URLs or hostnames like www.fireship.io to the IP address of the server that hosts that site.
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When you type a URL into the browser, it makes a DNS query to figure out which unique IP address is associated with that hostname.
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First, it'll attempt to look in the local browser or operating system cache, But if the cache is empty, then we need to look up the IP address in the phonebook,
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which is the job of a server known as the DNS recursive resolver.
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It's recursive because it needs to make multiple requests to other servers, starting with the root name server,
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which itself will respond with the address of a top-level domain DNS server, which stores data about top-level domains like .com or .io.
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The resolver makes a request there, which will respond with the IP address of the authoritative name server.
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That's the final source of truth that contains the requested website's IP address.
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That gets sent back down to the client and is cached for future use.
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That sounds complicated, but it all happens within a fraction of a second.
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You can think of it as a globally distributed database that handles more requests than any other database in the world.
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When you register a domain name, it's handled by a registrar accredited by the nonprofit organization ICANN.
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The record is then maintained by a registry operator, who stores your DNS settings and propagates them to other DNS servers around the world.
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As the registrant, you'll be assigned a zone file where you can configure the settings of your domain.
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Every zone has a Start of Authority record to tell other DNS servers who's in charge of that domain.
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But most importantly, we have the A record.
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It means address and maps a domain or subdomain to the IP address of its host.
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In other cases though, we may want to forward a domain to another domain on the internet instead of an IP address.
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In which case, a canonical name or CNAME record would be used.
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We have MX records for email, and we can store arbitrary data with text records, which is often used to communicate with third parties to verify ownership of the domain.
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And finally, we have the NS, or Name Server record, a URL that the internet can ping to find our IP address, and there's almost always two of them for better reliability.
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This has been the Domain Name System in 100 Seconds.
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Hit the like button if you want to see more short videos like this.
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Thanks for watching, and I will see you in the next one.
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Vocabulaire et conseils d’expression pour cette leçon
Cette leçon d’expression orale de niveau C1 s’appuie sur la vidéo « DNS Explained in 100 Seconds ». Les mots qui reviennent le plus souvent : domain, address, server, Dns, record. Cette vidéo contient 25 phrases et 459 mots à répéter en shadowing. La partie parlée dure 2:15. Le locuteur parle vite, environ 204 mots par minute : attendez-vous à des liaisons et à des sons réduits. Seuls 74 % des mots font partie des 3 000 mots les plus courants en anglais, le vocabulaire est donc exigeant.
Vocabulaire clé de cette vidéo
Les 15 mots les plus avancés de la vidéo, avec leur prononciation et leur sens :
| Mot | Prononciation | Sens |
|---|---|---|
| cache nom | /kæʃ/ | cache, mémoire cache |
| hostname nom | nom d'hôte | |
| recursive adjectif | /ɹɪˈkɜː(ɹ)sɪv/ | récursif |
| accredit verbe | /əˈkɹɛd.ɪt/ | accréditer |
| authoritative adjectif | /əˈθɔɹɪˌteɪtɪv/ | officiel, autoritaire |
| canonical adjectif | /kəˈnɒn.ɪ.kəl/ | canonique |
| configure verbe | /kənˈfɪɡə(ɹ)/ | configurer |
| registrar nom | /ˈɹɛd͡ʒ.ɪsˌtɹɑɹ/ | registraire |
| subdomain nom | sous-domaine | |
| query nom | /ˈkwɪɹ.i/ | question |
| assign verbe | /əˈsaɪn/ | désigner |
| registry nom | /ˈɹɛd͡ʒɪstɹi/ | enregistrement |
| distribute verbe | /dɪˈstɹɪbjuːt/ | distribuer |
| globally adverbe | /ˈɡloʊbəli/ | globalement |
| arbitrary adjectif | /ˈɑː.bɪ.tɹə.ɹi/ | arbitraire |
Les verbes à particule que vous entendrez
| Mot | Sens |
|---|---|
| figure out verbe | cerner |
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 associated · is cached · be assigned |
| Propositions relatives who / which + proposition — une précision sur une personne ou une chose | there, which will · records, which is |
Prononciation à surveiller
- Les sons « sh » et « zh »: cache /kæʃ/, fraction /ˈfɹæk.ʃən/
- Mots longs — placez bien l’accent: authoritative /əˈθɔɹɪˌteɪtɪv/, canonical /kəˈnɒn.ɪ.kəl/, arbitrary /ˈɑː.bɪ.tɹə.ɹi/, importantly /ɪmˈpɔɹ.tənt.li/
Les sons difficiles pour les francophones :
- /tʃ/ et /dʒ/ — à ne pas adoucir en « ch » et « j »: registrar /ˈɹɛd͡ʒ.ɪsˌtɹɑɹ/, registry /ˈɹɛd͡ʒɪstɹi/
- /r/ anglais — langue recourbée, sans frotter la gorge: recursive /ɹɪˈkɜː(ɹ)sɪv/, browser /ˈbɹaʊ.zəɹ/, accredit /əˈkɹɛd.ɪt/, authoritative /əˈθɔɹɪˌteɪtɪv/, configure /kənˈfɪɡə(ɹ)/
Comment s’entraîner avec cette vidéo
- Écoutez la vidéo en entier une fois sans parler et notez les mots que vous ne connaissez pas.
- Commencez à la vitesse 0,75×, répétez phrase par phrase, puis revenez à la vitesse normale quand cela devient facile.
- Enregistrez-vous et comparez avec l’original, en faisant attention à des mots comme cache, hostname, recursive.
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.