Static IP address
Network devices, and servers in particular, integrated permanently in a network,
have static IP addresses. Clients often have a dynamic IP address.
Web server (integrated permanently in a network) has a static IP address and can
thus be reached easily by clients.
Subnet
A subnet subdivides a network into smaller network segments.
Subnet mask
A subnet mask masks the IP address, i.e. it determines which parts of the IP
address form the network number and which parts the computer number (e.g.
server).
Subnet mask 255.255.255.0 means that the first three sections of the IP address
determine the network number, and the fourth section is used for the computer
number. In this case, the first three IP address sections are identical for all network
devices.
Example:
Subnet mask 255.255.255.0 masks IP addresses: 192.168.1.1…192.168.1.254.
Note:
Do not use the first IP address 192.168.1.0 and last IP address 192.168.1.255.
Switch
A switch, similar to a hub, is a connecting element to connect various network
segments or network devices. Contrary to the hub, a switch is an intelligent device
used to route packages only to the subnet or network device for which a package is
destined.
TCP
The TCP protocol is a TCP/IP protocol. TCP is responsible for transporting data
between two communication partners (applications). TCP is a secured
transmission protocol, i.e. a connection is established, monitored and disconnected
to data transmission.
TCP is a so-called connection-oriented protocol. The transmission control protocol
TCP reassembles the data packages, sent by the Internet protocol IP via different
network connections, in the right order at the recipient.
TCP/IP
Family of protocols used as the basis for the Internet. TCP/IP for the basis for any
number of internet services such as
(Web),
(file transfer) and
(mail).
TLS
TLS (Transport Layer Security, for [outdated]: SSL Secure Sockets Layer) a hybrid
encryption protocol to transmit data over the Internet. TLS 1.0, 1.1 and 1.2 are
standardized developments of SSL 3.0 (TLS 1.0 is now used for SSL 3.1). In other
words, SSL is being further developed under the name TLS. The abbreviation SSL
used here refers to both designations.
Web server does not use TSL: E-mails are sent
unsecured
, i.e.
without
TSL, a
protocol to encrypt data transmissions on the Internet.
Transmission Control
Protocol
See TCP
Transport Layer
Security
See TLS
UDP
UDP is a TCP/IP protocol to control data traffic between two communication
partners (application). UDP, in contrast to TCP, is an unsecured protocol. UCP is a
so-called connection-less protocol. Data packets are broadcast. The recipient is
responsible for receiving data. The sender does not receive notification if the data
packages were received.
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Appendix
25.08.2010