Hetsy die netwerkkabel hetsy die veselterminaal word vervang.

It means either ... or ....

So:

• Hetsy die netwerkkabel
• hetsy die veselterminaal

= either the network cable or the fiber terminal

This structure is a bit more formal or written-sounding than some other ways of saying the same thing.

Because Afrikaans often uses it as a paired construction:

• hetsy X hetsy Y

This is the normal pattern, just like English either X or Y uses two linked parts.

So you should think of the whole chunk together, not as a single word acting alone.

It is correct, but it sounds somewhat formal, administrative, or written.

In more everyday Afrikaans, people may more often use:

• of ... of ...
• sometimes óf ... óf ... for emphasis

So this sentence has a slightly official or technical tone, which fits the vocabulary.

word vervang is a passive construction and means is being replaced or gets replaced, depending on context.

• vervang = replace / replaced
• word here is the passive auxiliary

So the sentence is not saying that the cable or terminal is doing the replacing. It is saying that one of them is the thing being replaced.

In Afrikaans passive sentences, word is commonly used for an action in progress or a general passive idea:

• Die kabel word vervang. = The cable is being replaced.

By contrast, is vervang usually refers to a completed result:

• Die kabel is vervang. = The cable has been replaced / was replaced

So in your sentence, word vervang focuses on the replacement as an action.

Because the meaning is either one or the other, not both together.

Also, Afrikaans present-tense verbs usually do not change form much for number anyway. Compare:

• Die kabel word vervang.
• Die kabels word vervang.

The verb stays word.

So the sentence does not need a special plural verb form.

die is the definite article, meaning the.

It appears before both nouns because each noun phrase is complete on its own:

• die netwerkkabel = the network cable
• die veselterminaal = the fiber terminal

That is the normal way to say it.

They are compound nouns, which are very common in Afrikaans.

• netwerk = network

• kabel = cable
  → netwerkkabel = network cable

• vesel = fiber / fibre
• terminaal = terminal
  → veselterminaal = fiber terminal

Afrikaans often joins nouns together into one word, just like Dutch and German.

Because Afrikaans usually writes compound nouns as a single word.

So where English often writes:

• network cable
• fiber terminal

Afrikaans prefers:

• netwerkkabel
• veselterminaal

This is one of the most noticeable spelling differences for English speakers learning Afrikaans.

The sentence follows normal Afrikaans main-clause word order, where the finite verb comes early in the clause.

The first part is the paired subject idea:

• Hetsy die netwerkkabel hetsy die veselterminaal

Then the finite verb appears:

• word

And then the past participle:

• vervang

So the structure is essentially:

• Either X or Y is being replaced

Afrikaans passive clauses often look like:

• Subject + word + past participle

For example:

• Die toestel word herstel. = The device is being repaired.

Sometimes word vervang can be understood more generally as is replaced or is being replaced, and in the right context it may refer to a planned action.

But if you want a clearly future meaning, Afrikaans often uses:

• sal vervang word

For example:

• Hetsy die netwerkkabel hetsy die veselterminaal sal vervang word.
• Either the network cable or the fiber terminal will be replaced.

So your original sentence most naturally reads as a present passive or general statement.

Not in this sentence.

Here it clearly means either ... or ..., not whether ... or ....

That matters because:

• either ... or ... presents two alternatives
• whether ... or ... introduces uncertainty in a different way

So for this sentence, either the network cable or the fiber terminal is the right idea.

Yes. The vocabulary and structure sound very suitable for technical support, installation notes, troubleshooting, or repair communication.

It has a slightly formal, procedural tone, which matches contexts involving hardware and replacement decisions.