What are the access methods of broadband and narrowband, and what are the differences between variou

One is fast and one is slow! One is high and the other is low.

Wireless, wired, fiber optic cable.

There are two types of access first bandwidth destruction modes for broadband services, namely, ().

Correct answer: ab

a.Wired connection happens to be buried.

b.Wireless access.

c.The exchanger is ready to access.

d.Network access.

There are four types of broadband access methods: ADSL, LAN, FTTH, and PON

Cable television.

The original principle of coaxial cable transmission is different from that of ADSL, and the principle of coaxial cable transmission.

It's shared, while ADSL is exclusive. Knowing the principle, let's analyze which one is better. First of all, if the principle of coaxial cable transmission is shared, there will be a distribution problem.

The question of distribution is how many users of this coaxial cable are allocated together. The more users, the slower it becomes. This is not the case with ADSL.

Because of the exclusive broadband, the speed is stable, unless there is interference in the place where the line passes, which may affect the speed.

ADSL is similar to coaxial BAI ADSL, which is simple for general household use.

Du said that it is directly connected to the program dao control switch with the ** line, and the coaxial transmission is not good, and it is easy to be interfered with. But also look at the quality of the coaxial. Generally speaking, a good coaxial is very expensive, so the associated costs will also increase.

The speed of the network is related to the bandwidth that the communication company gives to the user, and it has nothing to do with what line is used.

Telecom also has network cable access, but it is rare to see if your community has such a service! Netcom is generally accessed with a network cable.

Hello, the broadband BAI access mode is divided into ADSL, ADSL

LAN, FTTH, and PON:

1. ADSL: Chinese name of the Chinese language: is an asymmetric number DAO word user line loop. It is patented with an existing pair of copper bina.

Access in Beijing, ADSL is well-known, in order to carry out civilian publicity, Telecom also gave it a nice name - "super first-line."

Answer". Access fee: The original ordinary ** ADSL line or the new ** ADSL installation at the same time will be charged a one-time access fee and a material fee of 300 yuan, and the ADSL line modification ADSL will be given as a gift, and the same initial installation fee will be charged.

Usage fee: Beijing does not currently provide ADSL unlimited monthly subscription service, but adopts an hourly charging method, and the excess part needs to be calculated and charged according to the normal time and time billing method.

Overall, Beijing's ADSL service is relatively monotonous, with only enough bandwidth for the "quasi-broadband" standard, and the usage fee is high, the method is inflexible, and the lack of unlimited monthly subscription services is scandalous.

Broadband in basic electronics and electronic communications is to describe the continuation or electrical circuits contained in or within.

1.There are currently a variety of broadband access methods: duadsl mode, optical fiber cell square type, and same DAO

Axis access mode, electric power broadband access mode 2The most commonly used by various operators are ADSL mode and optical fiber access mode3The most common type of mobile broadband access is cell fiber access, because China Mobile did not do wired access before, and later it mainly did fiber access.

According to the OECD (Organization for Economic Cooperation and Development), any DAO Internet with a transmission rate of more than 256Kbps.

Back connection, which can be referred to as broadband.

"Narrow" and "wide" are relative concepts and have no strict numerical boundaries, only relative to the characteristics of the signal.

First, the "signal to be transmitted" we call the source, the source has a certain spectrum characteristics, the source signal usually needs a carrier signal to modulate it, in order to send it to the distance, the source signal bandwidth is much smaller than the carrier center frequency is the narrowband signal, on the contrary, the size of the two comparable is called a broadband signal;

Second, in actual communication, the frequency band resources allocated to you + the real propagation environment, we call it the channel, the channel also has certain spectrum characteristics, under normal circumstances, the wider the allocated band resources, the more stable the propagation environment, the higher the data rate that the channel can carry;

Third, from the spectrum of the waveform, the signal bandwidth is δf and the carrier frequency is fc.

Wideband: In digital communication, it usually refers to the bandwidth of a signal above 64kbits. Narrowband: In digital communication, it usually refers to the bandwidth of a signal below 64kbits.

Narrowband: It is to pass bai

The unified ** line access mode DU, including the familiar modem (the general DAO is called the public ** network) as well.

Utilize wireless within.

Capacity** (i.e., mobile phone Internet access) is a narrowband access mode. Integrated Services Digital Network (ISDN) is also still in the category of narrowband networks.

Broadband: It is a computer network with higher communication rate and higher throughput than traditional networks.

At present, there are three types of broadband network access modes: ADSL, Ethernet and Cablemodem. ADSL is Broadband Access.