zhège tàocān de wǎngsù hěn kuài.

Not necessarily. In Mandarin, adjectives like 快 can function like verbs, but when you make a simple statement such as X is fast, Chinese often inserts 很 before the adjective.

So:

• 网速很快 = the internet speed is fast
• It can also mean very fast depending on context, but often 很 here is just a natural grammatical marker, not a strong very

If you want to clearly say very fast, context usually makes it clear, or you can strengthen it with words like:

• 非常快 = extremely fast
• 特别快 = especially fast

If you say just 网速快, it can sound more contrastive, like the internet speed is fast (as opposed to something else).

的 links a modifier to a noun. Here it shows possession or association.

• 这个套餐 = this plan/package
• 网速 = internet speed
• 这个套餐的网速 = the internet speed of this plan

So 的 works a bit like of or the apostrophe-s in English, depending on how you translate it.

You can think of the structure as:

[this plan] + 的 + [internet speed]

套餐 literally means a set package or combo. In different contexts it can mean different things:

• in a restaurant: a set meal / combo meal
• in telecom or internet service: a service plan / package

In this sentence, it most likely means a data plan, internet plan, or service package.

So 这个套餐 probably means this plan rather than a food combo.

Mandarin often puts modifying information before the thing being described.

Here the structure is:

• 这个套餐 = this plan
• 的 = linking particle
• 网速 = internet speed
• 很快 = is fast

So literally, it is something like:

This plan’s internet speed is fast.

That is very normal Mandarin word order: [owner/modifier] + 的 + [noun] + [predicate]

Yes, 这个 means this before a noun, but more literally it is:

• 这 = this
• 个 = a measure word / classifier

In Mandarin, when a demonstrative like 这 or 那 is followed by a noun, you usually need a measure word:

• 这个套餐 = this package/plan
• 那个手机 = that phone

个 is the most common general measure word, and it works fine with 套餐 here.

Yes. In normal speech, 个 in 这个 is usually pronounced with a neutral tone:

• 这 = zhè
• 个 = ge (neutral tone)

So it sounds like zhège.

That is why the pinyin is often written zhège rather than zhègè.

网速 means internet speed or connection speed.

It is a shortened form of:

• 网络速度 = network speed / internet speed

Native speakers often use shortened forms like this in everyday speech, so 网速 is very common and natural.

Yes, absolutely. 快 means fast, and it is very commonly used for speed in general, including:

• 车很快 = the car is fast
• 他跑得很快 = he runs fast
• 网速很快 = the internet speed is fast

So 快 is the normal adjective here.

Usually, 这个套餐的网速很快 is the clearer and more standard phrasing.

If you remove 的, the sentence becomes less natural for many learners’ intended meaning. 的 is helpful because it clearly marks the relationship: the internet speed of this plan.

In some casual spoken Chinese, people do sometimes omit 的 in certain phrases, but for a learner, it is safer to keep it here:

• 这个套餐的网速很快 = natural and clear

You can put 不 before 快:

• 这个套餐的网速不快。 = The internet speed of this plan is not fast.

If you want to say it is slow, you can say:

• 这个套餐的网速很慢。 = The internet speed of this plan is slow.

A simple way is to add 吗 at the end:

• 这个套餐的网速很快吗？ = Is the internet speed of this plan fast?

Another common spoken pattern is A-not-A:

• 这个套餐的网速快不快？ = Is the internet speed of this plan fast?

Both are correct. The A-not-A form is especially common in conversation.

很快 often means fast, but depending on context it can also mean soon.

For example:

• 网速很快 = the internet speed is fast
• 他很快就来了 = he came soon / he will come soon

In your sentence, because the topic is 网速 (internet speed), 很快 clearly means fast.

In standard Mandarin, you would normally say:

• 这个套餐

because a demonstrative like 这 usually needs a measure word before a noun.

So:

• 这个套餐 = standard
• 这套餐 = nonstandard in ordinary Mandarin teaching contexts

Some regional varieties or very casual speech may sound different, but learners should use 这个套餐.

The pattern is:

Demonstrative + measure word + noun + 的 + noun + 很 + adjective

Using your sentence:

• 这个 = this
• 套餐 = plan/package
• 的 = linking particle
• 网速 = internet speed
• 很快 = is fast

So the full pattern is:

这个套餐的网速很快。 = The internet speed of this plan is fast.

This is a very useful pattern you can reuse:

• 这个手机的屏幕很大。 = This phone’s screen is big.
• 那家店的服务很好。 = That store’s service is very good.
• 这个地方的天气很冷。 = The weather in this place is cold.