Kỹ thuật viên kết nối modem.

• Kỹ thuật viên = technician
• kết nối = connect / connects
• modem = modem

So the sentence structure is:

• Kỹ thuật viên = subject
• kết nối = verb
• modem = object

It follows the very familiar subject–verb–object order.

Because kỹ thuật viên is a fixed noun phrase meaning technician.

You can think of it like this:

• kỹ thuật = technical, technology, technique
• viên = a person associated with something, often used in job titles

Together, kỹ thuật viên functions as one unit: technician.

Vietnamese often builds job titles this way, with multiple words forming a single role.

Vietnamese usually does not use articles the way English does.

So Kỹ thuật viên can mean:

• the technician
• a technician
• sometimes even technicians, depending on context

Likewise, modem can mean:

• the modem
• a modem

Context tells you which one is intended.

Vietnamese verbs do not change form the way English verbs do.

The verb kết nối stays the same. Tense and aspect are usually understood from:

• context
• time words
• extra markers such as đã for past, đang for ongoing action, or sẽ for future

For example:

• Kỹ thuật viên kết nối modem. = the technician connects / is connecting the modem
• Kỹ thuật viên đang kết nối modem. = the technician is connecting the modem
• Kỹ thuật viên đã kết nối modem. = the technician connected / has connected the modem

Because kết nối is already an action verb.

In Vietnamese, when you have a normal action verb, you usually do not add a separate word meaning is before it.

So:

• Kỹ thuật viên kết nối modem. = technician connect(s) modem

A copula like is is not needed here.

Yes. This sentence uses standard subject–verb–object order:

• Kỹ thuật viên = subject
• kết nối = verb
• modem = object

So in that sense, it is quite straightforward for an English speaker.

It is often used as a verb meaning to connect, but it can also be used in ways that relate to the idea of connection depending on context.

In this sentence, it is clearly a verb because it sits between the subject and the object:

• Kỹ thuật viên → who does the action
• kết nối → the action
• modem → what is being connected

So here, read it as connects or is connecting.

Because classifiers are not always required.

After a verb, a bare noun is very common:

• kết nối modem = connect a/the modem

If you wanted to be more specific about one physical item, you could say:

• kết nối cái modem

But in ordinary speech, especially after a verb, leaving out the classifier is completely normal.

It is a borrowed word, but yes, it is commonly used in Vietnamese.

Many technology terms in Vietnamese come from English or international usage. Modem is one of them.

In everyday Vietnamese, people may pronounce it in a Vietnamese way, roughly like mo-dem.

A rough pronunciation guide is:

• Kỹ: roughly like kee with a creaky rising tone
• thuật: roughly thoo-uht with a short, clipped ending
• viên: roughly vee-en with a smooth rising tone
• kết: roughly ket with a sharp tone
• nối: roughly noy with a rising tone
• modem: roughly mo-dem

A more important point than exact English-style approximation is to notice that Vietnamese is tonal, so the tone marks matter:

• ỹ
• ậ
• ê
• ố

If your textbook includes audio, it is much better to imitate the audio than to rely only on English spelling approximations.

Yes, in the right context it can.

Because Vietnamese usually does not mark:

• singular vs. plural
• a vs. the

the sentence by itself can be somewhat general.

Depending on context, it could be understood as:

• the technician connects the modem
• a technician connects a modem
• technicians connect modems

If the speaker wants to make number clearer, they can add words such as:

• một = one, a
• những / các = plural markers in some contexts

Yes, it is grammatically natural.

It sounds like a simple, neutral statement, the kind you might see in:

• a textbook
• a work procedure
• a description of someone’s job
• a basic narrative

In real conversation, a speaker might add more context, for example:

• Kỹ thuật viên đang kết nối modem. = The technician is connecting the modem.
• Kỹ thuật viên kết nối modem mới. = The technician connects the new modem.
• Kỹ thuật viên đang kết nối cái modem cho khách. = The technician is connecting the modem for the customer.