シャドーイング練習: FREE CCNA 200-301 course // Complete Practical CCNA (v1.1 2025 Course) with real equipment - 動画で英語スピーキングを学ぶ

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181 文

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Welcome to my complete practical CCNA course.

This course is very different to other courses.

I'm going to be explaining CCNA topics using physical equipment.

rather than simulations or emulators.

I've heard this story too many times.

new person arrives at site.

they need to configure a device and they ask, where is the device?

and the customer is shocked because the device is right next to them.

And that's because the person has only ever used simulations or online labs and doesn't actually know what devices look like.

It's really important that you see what the physical devices actually look like

and how they act rather than just using a simulator or even an emulator like CML.

I've spent thousands of dollars collecting various devices, to add to this course and this is only some of them.

As an example here's a Starlink Mini.

This really changes the game because you can access the internet using a portable satellite dish like this.

This has a built -in router

and I'm going to explain what a router actually is

because you need to know the differences between say routers such as these

or some of these routers versus what a switch is

and what a layer two

and a layer three switches you may not understand what those terms are right now

but in this video and in the course i'm going to explain those topics in a lot of detail

and you're gonna configure Cisco routers and switches so that you have the knowledge to pass the CCNA exam, but also have the knowledge to go out there and be successful in your career.

Now, Packet Tracer and CML or Cisco modeling labs are fantastic for labs

and you can use those as part of this course.

They cannot simulate physical devices like these fiber optic cables, you need to know the difference.

between a single mode fiber optic cable, and a multi -mode fiber optic cable.

Notice the difference in the light shone through these cables single mode fiber, If I bend it, you can see the light bleeding through the cable there.

But notice the pattern doesn't really change.

Whereas with multi -mode fiber, if I bend the cable, the pattern changes, it moves.

You need to understand the difference between multi -mode and single -mode fiber.

Very difficult to understand that and visually see what it does when you're just using an emulator.

Now you may be wondering why do you need to know about fiber cables?

You're actually using them right now.

The world is connected using fiber cables under the oceans.

So when you're watching a YouTube video as an example, that information is transmitted across a fiber cable such as these.

We also have copper ethernet cables.

So this is a copper ethernet cable that you've probably seen before.

It's using an RJ45 connector at the end here.

This uses copper, this is fiber, data is transmitted through light through these cables where she had uses electricity to transmit data.

Now in the CCNA course, you're gonna learn about an ethernet bridge, specifically in spanning tree, you're gonna learn about something called the spanning tree root bridge.

people will just show you a picture of a bridge.

They will not show you what it actually looks like.

So they'll use an icon.

and we've actually designed brand new icons for this course

So all the topologies are gonna be using a new icon set that we've created.

So you'll just see an icon similar to what's on screen at the moment, but you don't know what a bridge actually looks like and how it actually acts.

Now I do get some pushback or flack when I show older devices, but a really important lesson in networking.

If you don't understand, the past, you won't understand why things act the way they do today.

Like as an example, if you don't know what a bridge is, you wouldn't understand why we have a root bridge rather than a root switch in spanning tree.

You wouldn't understand Why a switch?

And this is a very modern switch.

This is a 9200 CX switch.

Why a modern switch like that is better than a bridge.

Or even an older switch like this 2950 series switch.

Switches are much faster than bridges, but they act in a very similar way.

In the very old days, we had interfaces like these.

These are serial interfaces.

Very, very slow.

You may still come across them depending where you are in the world.

So I'm gonna talk about some of the history as we go through this course, so that you understand concepts such as a collision domain or broadcast domain.

Collision domains were really important when we had hubs Notice this is a Cisco hub.

This is a hub.

This is a switch.

They're very different.

A hub as an example works as follows.

When traffic arrives in one port, it's repeated out of all the other ports.

This is known as a multi -port repeater.

Here's an example of a single port repeater.

We've only got port one and port two here.

So when traffic arrives in one port, it gets repeated or amplified out of another port that allows ethernet to traverse much greater distances.

So as an example, with the cables that we tend to use today, UTP cabling, a cable like this as an example, maximum distance is 100 meters.

If you wanted to amplify the signal or have the signal go further, You need something that repeats the signal or amplifies the signal.

And this is a very basic example of a repeater.

Multi -port repeater or hub is a dumb device.

It doesn't understand the traffic sent in the network.

So when traffic arrives in one port, destined to one other device, simply replicated, or repeated out of all other ports on the device.

That means that if you have a collision on any one of these ports, it affects everyone in the topology.

Switches work differently to hubs.

So in switches, we use what are called MAC addresses.

or hardware addresses to identify hosts on a network.

So when you use your phone as an example to connect to a wifi network, or you use your computer to connect to a physical ethernet network,

you'll notice that it has what's called a MAC address or media access control address

That is a hardware identifier for a device on a ethernet network or a wifi network.

Your device will also have an IP address.

Here we've got both an IP version four, as well as an IP version six address.

In networks today and the internet today, we use IP version four or IP version six Those are protocols or languages, if you like.

Here we speak in English.

Hopefully you can understand what I'm saying because we're speaking the same language.

when a phone, as an example, is used to go to YouTube, the language used by the phone to send information into the network,

and for YouTube to send a video back to the phone, is IP version 4 or IP version 6.

Now I've invested thousands of dollars collecting equipment for this course, and this is only some of it.

Not only collect equipment that you might never have seen before, such as this ethernet bridge, or the Cisco hub, but I've also collected very modern devices to add to the course,

such as this Catalyst 9200L switch, and one of my favorites, the C9200CX switch.

I like these small switches, such as the 1000 series switch, because they're quiet and I can run them on my desk without a bunch of fan noise, but I have got bigger switches such as this one.

I've also got a Cisco 8200 router, or what Cisco call an edge platform, but it's essentially a router.

So I've got a very an ISR 1100 4G, as well as these 1000 series routers.

So I've got These two routers that have multiple ethernet ports, and this one has a DSL port as an example.

I've also got a Cisco firewall, as well as a Cisco LAN controller, and I've collected a whole bunch of access points.

so that I can physically demonstrate how things work.

100

Now what is a router?

101

Rouders basically route from one network to another.

102

You may have a router similar to this at home.

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One of the most confusing things about devices today is that they actually combine various features together.

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So even though this is a router, it actually acts like a Wi -Fi access point.

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In other words, you can connect to the router using Wi -Fi.

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Here's a dedicated Wi -Fi access point as an example.

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This isn't a router.

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It's simply an access point allowing you to connect to the network using a Wi -Fi device.

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So this acts like a Wi -Fi access point.

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It acts like a switch.

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So it has what are called LAN ports, but notice it also has a WAN port.

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These are local area network ports.

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Local area network is a network like in your home.

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It's local to where you are.

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Routers route from one network to another, using the WAN or Wide Area Network.

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So as an example, you could use Ethernet like on this router, but here's a 5G router.

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This routes from your home, to a 5G network.

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Here's a Stalingrad.

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Routes from your home network, as an example, to satellites.

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and onto the internet.

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Here is a DSL connection.

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This routes from your home network So perhaps you've got some devices connected to these ports at home

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connects you via your telephone to the internet or wide area network.

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So a writer will write you, for instance, from, Ethernet, your local area network or WiFi, to satellite or from Ethernet,

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your LAN interface, or your local network, Tid.

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5G or 4G, or if you've got fiber at home, you might have an ethernet port

127

on your router that connects you to a modem or a device

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that your internet service provider or ISP gives you at home "with a fiber connection." Again, I'm hoping that this is the most complete,

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the most practical, and most real -world CCNA course that you take, that you're not just learning about stuff from a theoretical point of view,

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that you're actually seeing what these are.

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These are SFPs.

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So we've got 10 gig SFPs here.

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We've got gig SFPs.

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Here's a 25 gig.

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DAC cable or direct attach cable.

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And here we've got 100 gigabits per second QSFP 28.

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I don't want you to go out into the real world and only learn about stuff through

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slides or through pictures i want you to actually see how things work

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and not just old equipment but very modern equipment as well Now for the labs, you could use Packet Tracer.

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This is a Cisco 4321 router, and the reason I purchased this router is because it's part of Packet Tracer.

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So in the labs, I will show you physically how things look, and then you'll be able to configure them.

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Packet Tracer is a fantastic simulator, but it doesn't, simulate everything perfectly.

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2950 switches are also part of packet tracer.

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But again, I've got very modern switches like the C9200CX fantastic little switch.

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It's important that you understand the difference between a classic iOS switch as well as a iOS XE switch.

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So I've got both examples here so

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that you can see how iOS XE versus iOS works, basically iOS is the operating system that devices run.

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Think of this like running Windows or Mac OS, So you're running a Windows operating system on your PC.

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This device runs Cisco IOS, this device runs Cisco IOS XE.

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So you need to learn the commands

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that the operating system uses in the same way that you'd learn commands in Windows or Linux or Mac OS.

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And that gets to me talking about PCs that are part of the lab.

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I'm gonna show you macOS, I'm gonna show you Linux, I'm gonna show you Windows.

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physical laptops that are connected to the devices so that you understand how things actually work versus what simulated environments do.

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So as an example, if I had this MacBook connected to port one on the switch, and this Windows computer connected to port two on the switch.

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If traffic was sent from the MacBook, to the Windows computer, traffic would arrive on port one and only go out of port two,

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because the switch would learn where the MAC addresses are of the devices and the topology.

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With a hub, however, if The MacBook was connected to port one again and the Windows computer is connected to port two, if traffic was sent from the MacBook to the Windows computer,

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it would go out of every port.

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except the port in which it arrived because the hub is basically a dumb device doesn't understand devices are in the topology, it doesn't learn MAC addresses,

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it simply repeats or floods the traffic out of all ports except the port in which it arrived, hence it's called a multi -port repeater.

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We don't really use hubs today, but the reason why it's important to know about them is you need to understand collisions in Ethernet networks.

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Wi -Fi, as an example, is a shared medium.

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So the bandwidth is shared between multiple devices in the same way that it is with a hub.

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I've used a lot of terminology now, Don't let it overwhelm you.

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We're going to talk about what this means and why it's important.

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I'm gonna show you how these physically get inserted into switches such as these.

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and how they're used with fiber cables as an example.

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Don't let the terminology worry you.

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If you struggle, just know that you're joining many of us who started initially, and it felt like we were drinking from a fire hydrant because there's so much information.

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Just keep on trying to learn something new every day, and you'll get it.

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Networking initially seemed really complicated because of all the terminology.

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Some people have told me that they find it really abstract.

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It's difficult to imagine things or to conceptualize things.

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And hence, me buying, once again, lots of physical devices and cables and options to show you how things actually work, both for the CCNA, but also for the real world.

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Big thing that I suggest you do is download Packet Tracer.

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It's free software that you can download from Cisco.

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and you can practice.

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So in the labs, you could either use Cisco Packet Tracer or CML /Cisco Modeling Labs, But if you're new to this and you're struggling,

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get Cisco Packet Tracer and I'll show you in an upcoming video how to download that and install it, and build your own networks using Cisco Packet Tracer.

181

Once you've seen real devices working, you'll find it a lot easier to work with Cisco Packet Tracer and configure networks yourself.

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このレッスンの語彙とスピーキングのポイント

このC1レベルのスピーキングレッスンは、動画「FREE CCNA 200-301 course // Complete Practical CCNA (v1.1 2025 Course) with real equipment」を教材にしています。繰り返し出てくる語は次のとおりです：port, device, network, router, switch。この動画には、シャドーイング用の文が181文、単語が2512語あります。音声の長さは13:19です。話す速さは速く、1分あたり約189語です。音のつながりや弱く発音される音が多くなります。英語の頻出3,000語に含まれる単語は79%だけなので、語彙は難しめです。

この動画の重要語彙

動画の中で特に難しい単語15語を、発音と意味つきで紹介します。

単語	発音	意味
router 名詞	/ˈɹaʊ.tɚ/	ルータ, ルーター
packet 名詞	/ˈpæk.ɪt/	パケット, 小包
configure 動詞	/kənˈfɪɡə(ɹ)/	設定する
topology 名詞	/təˈpɑləd͡ʒi/	位相幾何学, 位相数学
collision 名詞	/kəˈlɪʒn̩/	衝突
emulator 名詞	/ˈɛmjəˌleɪtəɹ/	エミュレータ
simulate 動詞	/ˈsɪm.jə.lət/	シミュレートする
terminology 名詞	/ˌtɝ.məˈnɑ.lə.d͡ʒi/	用語, 専門語
hub 名詞	/hʌb/	轂
simulator 名詞	/ˈsɪmjəˌleɪtɚ/	シミュレーター
simulation 名詞	/ˌsɪm.jəˈleɪ.ʃn̩/	真似, 模擬
connector 名詞	/kəˈnɛktɚ/	端子
firewall 名詞	/ˈfaɪ(ə)ɹˌwɔl/	防火壁
gigabit 名詞	/ˈɡɪɡəbɪt/	ギガビット
overwhelm 動詞	/ˌoʊ.vɚˈwɛlm/	圧倒する

動画に出てくる句動詞

単語	意味
go out 動詞	出る

繰り返し練習したい文

動画に出てくる短く完結した文です。日常会話でそのまま使えます。

I've heard this story too many times.
You're actually using them right now.
We've only got port one and port two here.
It's local to where you are.
Don't let the terminology worry you.

この動画の文法

話し手がよく使っている文型を、動画の実際の表現とともに紹介します。

文型	動画での表現
現在完了形 have/has + 過去分詞 — 過去の出来事が今も関係している	I've heard · has only ever used · I've spent
受動態 be + 過去分詞 — 誰がするかより、何が起きるかに焦点を当てる	is connected · is transmitted · is known

注意したい発音

話し手はI've, you're, I'mなど、短縮形や弱形を84回使っています。聞こえたとおりの短い形で発音しましょう。

「th」の音: bandwidth /ˈbændwɪdθ/, theoretical /ˌθi.əˈɹɛt.ɪ.kəl/
「sh」と「zh」の音: collision /kəˈlɪʒn̩/, simulation /ˌsɪm.jəˈleɪ.ʃn̩/
長い単語（アクセントの位置に注意）: topology /təˈpɑləd͡ʒi/, emulator /ˈɛmjəˌleɪtəɹ/, terminology /ˌtɝ.məˈnɑ.lə.d͡ʒi/, simulator /ˈsɪmjəˌleɪtɚ/, visually /ˈvɪzju.əli/

日本語話者が苦手な音：

/r/ と /l/ の区別 — /l/ は舌先を歯茎につけ、/r/ はどこにもつけない: emulator /ˈɛmjəˌleɪtəɹ/, firewall /ˈfaɪ(ə)ɹˌwɔl/, replicate /ˈɹɛplɪkeɪt/, portable /ˈpɔɹtəbəl/, theoretical /ˌθi.əˈɹɛt.ɪ.kəl/
/v/ — /b/ にならないように、上の歯を下唇に当てる: overwhelm /ˌoʊ.vɚˈwɛlm/, traverse /tɹəˈvɝs/, visually /ˈvɪzju.əli/
/f/ — 「フ」ではなく、上の歯と下唇で出す: fiber /ˈfaɪ.bɚ/, configure /kənˈfɪɡə(ɹ)/, amplify /ˈæm.plə.faɪ/, firewall /ˈfaɪ(ə)ɹˌwɔl/, confuse /kənˈfjuːz/

この動画での練習方法

まず声を出さずに動画を最後まで聞き、知らない単語をメモします。
まず0.75倍速で一文ずつシャドーイングし、慣れてきたら通常の速度に戻します。
自分の声を録音して元の音声と比べます。router, packet, configureなどの単語に特に注意しましょう。

シャドーイングとは？英語上達に効果的な理由

シャドーイング（Shadowing）は、もともとプロの通訳者養成プログラムで開発された言語学習法で、多言語習得者として知られるDr. Alexander Arguelles によって広く普及されました。方法はシンプルですが非常に効果的：ネイティブスピーカーの英語を聞きながら、1〜2秒の遅延で声に出してすぐに繰り返す——まるで「影（shadow）」のように話者を追いかけます。文法ドリルや受動的なリスニングと異なり、シャドーイングは脳と口の筋肉が同時にリアルタイムで英語を処理・再現することを強制します。研究により、発音精度、抑揚、リズム、連音、リスニング力、そして会話の流暢さが大幅に向上することが確認されています。IELTSスピーキング対策や自然な英語コミュニケーションを目指す方に特におすすめです。

シャドーイングのやり方: ステップ別の完全ガイドを読む →

シャドーイング練習: FREE CCNA 200-301 course // Complete Practical CCNA (v1.1 2025 Course) with real equipment - 動画で英語スピーキングを学ぶ

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