Task A:
installation service provider
A provider offers the following technologies in order to realize network connections (including the PPP, Point-to-Point Protocol)
MAN (Metropolitan Area Network) or WAN (Wide Area Network) connections are now "almost" standardized realized as a dedicated line.
A leased line is a permanent (permanent standing) connection between two communication partners about a telecommunications network.
dedicated line connection from order to unsubscribe.
You get a static IP assigned.
No dial-up.
"Einwählverdindung" connection is made via a dial-up.
; there as long as desired by the user. be
dial-up connections, even today, often realized via analog modem connections. The provider dial-up node directly connects to the Internet.
Integrated Services Digital Network (ISDN)
· A provider offers ISDN, with either 64, 128 Kbit / s (time slot) range or even faster with a primary rate interface. With a dedicated line is it is not possible, another Participants to choose. This variant is usually used for low-bandwidth wide area network. If two phones in more than 20-30% of the time connected, a leased line is usually cheaper than a dial-up connection.
- With the help of various digital devices set up connections over the NT (Network Termination for ISDN Basic Rate Access).
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A provider may provide the network type, the frame relay to: is
Frame Relay a data transmission technology, which is originally a development of X.25 (X.25 a protocol family for large-scale computer networks ( WANs) represented over the telephone network ) . Many network operators now offer frame relay connections as a cheaper alternative to a dedicated line .
The telco provider grout on a huge network of serial switches.
This is a group of routers with many serial ports.
There it is switched to the serial ports.
Frame Relay is very fast, several " virtual leased lines " are brought together in a Frame Relay.
In frame relay, the rates between 56 kbit / s and 45 Mbit / s vary. It is a virtual connection that can be moved at any time, for example. A plurality of frame relay connections from the ISP connected virtually, so you can access from any location directly to each other (provided of course that is desired).
provider of Frame Relay to offer more bandwidth than they actually have, since not every link is fully utilized throughout. This can also lead to the fact that you do not always have the maximum transfer speed available.
ADSL - Asymmetric Digital Subscriber Line
For ADSL is a transmission method for broadband Internet Connection via a normal telephone line.
The central problem is the limited reach of ADSL. Over time, the ADSL technology extended and improved so that the range or the transmission rate could be increased several times. Nevertheless, a complete coverage in Germany until now virtually impossible.
In an ADSL connection is, in principle, two modems on a conventional telephone line.
Where the modem is the end user and the other at the network operator in the exchange.
The ADSL modem is connected via a network card or USB interface to a computer or a network. This creates a solid connection. Selecting, as in a Phone connection is not necessary. Instead, the computer to the Internet as a "leased line" is firmly connected. Wherein the service line is referred to as a DSL connection.
The basic principle of ADSL is based on an asymmetric transmission method or providing an asymmetrical bandwidth. This means that the transmission path from the provider to the customer, and the transmission path between customer and provider have different band widths.
The ratio of the bandwidth of downlink and uplink, the requirement of a typical Internet user modeled. It loads typically more data from the Internet down, as it transfers to the Internet. Hence, the bandwidth of the downlink is greater than the uplink.
(Symmetric DSL) SDSL
S-DSL / There is a dedicated line
- connection is once established, fixed IP
- Uplink and downlink are the same
- When customers an S-DSL-enabled router is installed.
speeds (Up / Down) multiples of 64Kbit / s to 2.304 kbit / s.
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