Glossary Of Ethernet And Internet Terms - Siemens OZS164 SERIES WEB SERVER Commissioning Instructions

ADSL
Asymmetric Digital
Subscriber Line
Bit rate
Broadcast
Client
Default gateway
Default gateway
Denial of Service
DHCP
Digital Subscriber Line
DNS
Domain name
Domain Name System
Siemens
Building Technologies
6.5

Glossary of Ethernet and Internet terms

Upstream and downstream channel transport data at different rates, i.e.
asymmetrically via a two-wire line (DLS, copper phone line) on a broadband
n etwork.
Very little data is sent upstream, i.e. to the server, when surfing. The requested
data, however, are sent at high speed downstream to the requesting computer. You
c an call or e.g. send faxes while transmitting data.
The Internet Service Provider ISP provides the ADSL connection. You need a DSL
modem for this type of connection.
See ADSL
The bit rate describes the transmission speed or rate in bits per second (bps).
Data sent out to all participants on the network.
A client is a network device unable to execute certain services and thus requests
those services from the server. The server provides the service and sends a reply.
Gateway that is selected when one IP address is outside its own subnet and
therefore the standard gateway is unknown.
A default gateway (see also DSL router) is also referred to as a network address
used by clients to send their packages if the target address is outside the
immediate network.
See DoS attack
The DHCP protocol allows for dynamic assignment of an IP address to network
devices. Router servers also support this function.
See DSL
The DNS allows for assigning IP addresses to names (that are easier to remember
than 32-bit IP addresses). A DNS server must manage this information for each
LAN with Internet connection. When you select an Internet page, the web browser
accesses the IP address of that site assigned by the DNS server to open a
connection.
On the Internet, domain names are assigned to IP addresses as per a hierarchical
system. A local PC only knows the address of the local DNS server. This server, in
turn, knows the addresses of all PCs on the local network as well as that of the
higher DNS servers that, in turn, know the addresses of the next higher DNS
servers.
The domain name is the web server designation on the Internet. The DNS server
assigns an IP address to the domain name.
See DNS
Web server
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25.08.2010