Die tegnikus bepaal die kabelroete na gelang van die muuraansluiting.

In Afrikaans, die is the definite article for the. It is used for singular and plural nouns, and it does not change for grammatical gender.

So in this sentence:

• die tegnikus = the technician
• die kabelroete = the cable route
• die muuraansluiting = the wall connection/outlet

English also repeats the when needed, so this is quite normal.

Afrikaans verbs usually do not change form for person or number in the present tense.

So you get:

• ek bepaal
• jy bepaal
• hy/sy bepaal
• ons bepaal
• hulle bepaal

That is much simpler than English, where you have I determine but he determines. In Afrikaans, it stays bepaal.

Afrikaans main clauses normally follow the verb-second rule. That means the finite verb comes in the second position of the clause.

Here:

• Die tegnikus = first element
• bepaal = second element

So the sentence is structured normally.

You can also move another element to the front, but then the verb still stays second:

• Na gelang van die muuraansluiting bepaal die tegnikus die kabelroete.

That is a very common Afrikaans pattern.

Yes. na gelang van is best learned as a single expression. It means something like:

• depending on
• according to
• in accordance with

In this sentence, it shows that the cable route is determined with reference to the wall connection.

It is not just three random words put together each time; it functions as a set phrase.

Because the normal expression is na gelang van. The van is part of the phrase.

So you should learn it as:

• na gelang van iets = depending on something

You would not normally say na gelang die muuraansluiting. The van is required in standard Afrikaans.

Afrikaans usually writes compound nouns as one word. This is very common and is one of the first things English speakers notice.

So:

• kabel + roete → kabelroete
• muur + aansluiting → muuraansluiting

English often writes such combinations as two words or with a hyphen, but Afrikaans strongly prefers solid compounds.

Usually the last part is the main noun.

So:

• kabelroete is a kind of roete
• muuraansluiting is a kind of aansluiting

The first part narrows or specifies the meaning:

• kabel- tells you what kind of route
• muur- tells you what kind of connection

This is a very useful rule for understanding Afrikaans compounds.

It belongs with na gelang van.

So the structure is:

• bepaal = the main verb
• die kabelroete = the direct object
• na gelang van die muuraansluiting = a prepositional phrase explaining the basis on which the route is determined

It helps to read it as one chunk:

• na gelang van die muuraansluiting

Sometimes, but not always.

volgens often means according to in the sense of:

• according to a rule
• according to a plan
• according to a person/source

na gelang van often means:

• depending on
• determined by
• varying according to

In this sentence, na gelang van is a good choice because the cable route depends on the wall connection. volgens would sound a bit different in nuance.

In a subordinate clause, the verb usually moves to the end.

For example:

• Ek weet dat die tegnikus die kabelroete na gelang van die muuraansluiting bepaal.

Notice that in the dat-clause, bepaal comes at the end:

• ... dat die tegnikus die kabelroete na gelang van die muuraansluiting bepaal

That is an important word-order pattern in Afrikaans.