El alojamiento web permite la retransmisión.

El is the definite article the for a masculine singular noun. Here it goes with alojamiento, which is a masculine singular noun:

• el alojamiento = the hosting / the accommodation

So El alojamiento web means the web hosting or web hosting in a general, definite sense.

In Spanish, especially in more standard or formal usage, alojamiento web is a common way to say web hosting.

• alojamiento literally comes from the idea of hosting / lodging
• web specifies what kind of hosting it is

You may also hear hosting in tech contexts, because English words are often borrowed, but alojamiento web is a very natural Spanish expression.

Alojamiento is a noun. In many contexts it can mean accommodation or lodging, but in computing it means hosting.

So in this sentence it does not mean a hotel or a place to stay physically. It means the service of hosting a website or online content.

Because web here functions as an invariable modifier. In modern Spanish, especially in technology-related language, words like web, online, and some borrowed terms often stay the same.

So:

• alojamiento web
• página web
• sitio web

In all of these, web does not change form.

Because the subject is singular: El alojamiento web.

The verb must agree with the subject:

• El alojamiento web permite = singular
• Los alojamientos web permiten = plural

Even though alojamiento web may refer to a whole service or concept, grammatically it is singular, so the verb is singular too.

Permite is the third person singular form of permitir in the present tense.

• permitir = to allow / to permit / to make possible
• permite = it allows / it permits

In this sentence, El alojamiento web permite... means Web hosting allows... or Web hosting makes possible...

Because retransmisión is a feminine singular noun, so it takes la:

• la retransmisión

This article can often be translated as the, but in English it may sound more natural to leave it untranslated depending on context. Spanish uses articles more often than English does.

A very common clue is the ending -ión, which is usually feminine in Spanish:

• la retransmisión
• la transmisión
• la conexión
• la información

This is not an absolute rule for every word in Spanish, but for -ión nouns it is very reliable.

Retransmisión usually means rebroadcast, relay, or retransmission.

It is related to transmisión, but it adds the idea of transmitting something onward or again:

• transmisión = transmission, broadcast
• retransmisión = retransmission, rebroadcast, relay

So this sentence suggests that web hosting allows content to be broadcast or relayed onward.

It has an accent because the stress falls on the final syllable: -sión.

The word is pronounced roughly like:

• re-trans-mi-SIÓN

In Spanish spelling, words ending in n, s, or a vowel are normally stressed on the second-to-last syllable unless there is a written accent. The accent mark shows that this word breaks that default pattern.

Yes, it is grammatically correct and natural, especially in a technical or formal context.

That said, depending on the exact situation, a Spanish speaker might also say things like:

• El alojamiento web permite retransmitir contenido.
• El alojamiento web permite la transmisión en directo.
• El servicio de alojamiento web permite la retransmisión.

So the original sentence is fine, but there are other common ways to express the same idea more specifically.

Normally, no. In standard Spanish, permite la retransmisión sounds correct, while permite retransmisión sounds incomplete or unnatural.

Spanish often uses an article where English might not:

• permite la retransmisión
• facilita la comunicación
• me gusta la música

So keeping la here is the normal choice.

The vocabulary is broadly standard Spanish, including Spain Spanish. Alojamiento web is a very normal term in Spain.

In more international or tech-heavy contexts, some speakers might use English borrowings like hosting, but alojamiento web is clear, standard, and fully idiomatic in Spain.