135/148
Siemens Building Technologies
Commissioning instructions OZW775 V2.01
CE1C5663en
HVAC Products
Appendix
22.06.2012
The IP address is a unique address (house number) of a network device on the world-
wide network based on TCP/IP protocols. The IP address consists of four sections,
separated by a dot (192.168.1.1).
The IP address comprises the network number and the computer number (number of
the network device). Depending on the subnet mask, one or there sections form the
network or computer number.
IP addresses can be assigned automatically or manually. On the Internet, domain
names are used rather than IP addresses. The DNS server assigns domain names to
IP addresses.
IP address pool defined at the router (IP address range) the DHCP server can use to
assign dynamic IP addresses.
See subnet mask.
The ISP provides the connection to the Internet via DSL or cable TV at a specified
charge.
Protocol for dial-up connection of a computer to the ISP.
Protocol used to connect to the Internet via ADSL or DSL.
A local network (size: large building, building sites) is a number of interconnected
network devices. In LANs, data is exchanged and resources are used jointly. A LAN
can be connected to other networks such as WAN or Internet.
The MAC address allows for worldwide identification of a network adapter (network
card). It consist of hexadecimal numbers, grouped in six portions at 2x4 bit each, thus
48 bit, e.g. 00-55-96-5D-00-2C. The MAC address is assigned by the network adapter
manufacturer and cannot be changed.
Million bits per second indicates the transmission rate in a network.
NAT is a method to translate IP addresses (private IP addresses) in a network into one
or several public IP addresses on the Internet. NAT allows us to use several network
devices in a LAN together with a public IP address of a router for Internet access.
The network devices of the local network are masked by the IP address (router) regis-
tered on the Internet. Thanks to this security function, NAT often is used as a part of a
network's firewall. Web server OZW775 is accessible from a public network thanks to
the NAT table definition; see also port forwarding.
A network (LAN, WAN) is linked group of devices connected via various lines or radio
sharing common resources such as data or peripheral devices.
Use the network adapter (hardware) to connect a network device to a local network
LAN. Connection can be wired or wireless. For example, an Ethernet network card for
PC/laptop or Ethernet card OZZ7E5 in web server OZW775 is a wired network adapter.
IP address
IP address pool
IP subnetwork address
ISP (Internet Service
Provider)
PPP (Point-to-Point
Protocol)
PPPoE (PPP over
Ethernet)
LAN (Local Area Network)
MAC address (Media
Access Control)
Mbps
NAT (Network Address
Translation)
Network
Network adapter
