Glossary Of Ethernet And Internet Terms - Siemens OZW672 Series Commissioning Instructions

ADSL
Asymmetrical Digital
Subscriber Line
Bit rate
Broadcast
Client
Default gateway
Denial of Service
DHCP
Digital Subscriber Line
DNS
Domain name
Domain Name System
DoS attack
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7.4

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
network.
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 can 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 there-
fore the standard gateway is unknown.
See DoS attack
The new Dynamic Host Configuration Protocol allows for dynamic allocation of a
network configuration to clients (PC, web server) via a server (router).
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 ac-
cesses 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
A DoS attack (denial of service) is a special type of hacker attack on computers
and networks connected to the Internet. The DoS attack aims at disabling com-
puters and networks to prevent network resources from being provided and ser-
vices from being executed.
Web server OZW672... V4.0
Appendix
CE1C5712en
28.08.2012