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Glossary*
• Autoip: Automatic Private IP Addressing (known as APIPA or Auto IP), is a method for automatically assigning IP addresses
to the devices connected to the network.
• Dynamic DNS: Dynamic DNS is a technology that allows a DNS name to be permanently associated with the IP address
of the same host, even if that address subsequently changes.
• DHCP: In telecommunications and information technology, Dynamic Host Configuration Protocol (DHCP) is an application
layer network protocol that enables the devices or terminals of a local network to automatically receive on each request
to an IP network i.e. the internet) the necessary IP configuration to establish a connection and operate on a wider network
based on Internet Protocol, i.e. to interact with all the other subnets, exchanging data, provided that they are also integrated
in the same way with the IP protocol.
• Gateway: a gateway is a network device that operates at network level and above of the ISO/OSI model. It's main function
is to transport network data packets outside a local network (LAN) Gateway is a generic term for a service that sends data
packets outside of the network; the hardware device that fulfils this task is usually a router. Simpler networks have just
one gateway that sends all outbound trac to the Internet network. More complex networks have several subnets, each of
which refers to a gateway which routes data trac to other subnets or redirects it to other gateways.
• Dynamic IP address: dynamic addresses are used to identify non-permanent devices in a LAN. A server in the LAN
automatically dynamically assigns the address, selecting it a random from a preset range. You can select the range of
addresses in accordance with the number of users by setting the netmask, i.e. by telling the DHCP server how many
address bits can be assigned dynamically to each single client that accesses it. For example, if the netmask has the value
255.255.255.0 (where each block of numbers separated by a point denotes a group of 8 bits), only the last 8 bits can be
assigned to the hosts.
• Static IP address: static addresses are used to identify semi-permanent devices with a permanent IP address. Network
servers, printers, etc. typically use this addressing method. Static addressing is generally used in preference to dynamic
addressing for non permanent network devices if there is a limited number of hosts in the subnet and/or for security
reasons, so that the actions of each host and the relative user can be kept under control.
• Public IP address: in telecommunications and information technology, a public IP address is an IP address in the address
range of the internet network that is unequivocally allocated and is potentially accessible from any other public IP address,
and therefore can be used for addressing and routing via IP protocol.
• POE: Power over Ethernet or PoE (the acronym) is a technique for powering equipment via the same cable as that used
for Ethernet connection. It is very useful when there is no convenient electrical power source near the termination or when
you wish to reduce the number of elements and wires; for example, an IP phone on a desk can be powered directly via the
Ethernet cable in Power over Ethernet, thereby eliminating the need for a power supplier and its cable, making for a simpler,
less cluttered installation. For the moment, these techniques are used mainly to power devices that consume only a little
power, such as VoIP telephones, access points and webcams.
• Port forwarding: in computer networks, port forwarding is the operation that allows the transfer of data from one device
to another via a specific communication port. This technique can be used to allow an external user to reach a host with a
private IP address (within a LAN) via a port of the corresponding public IP address. This operation requires a router capable
of automatic translation of network addresses, or NAT.
*Sources
Dynamic DNS. (2015, June 8). Wikipedia,The free encyclopedia. http://it.wikipedia.org/wiki/Dynamic_DNS
Dynamic Host Configuration Protocol. (2015, June 8). Wikipedia, The free encyclopedia. http://it.wikipedia.org/wiki/
Dynamic_Host_Configuration_Protocol
Gateway (information technology). (2015, June 8). Wikipedia, The free encyclopedia. http://it.wikipedia.org/wiki/Gateway_
(informatica)
IP Address. (2015, June 8). Wikipedia, The free encyclopedia. http://it.wikipedia.org/wiki/Indirizzo_IP
Public IP address (2015, June 8). Wikipedia, The free encyclopedia. http://it.wikipedia.org/wiki/Indirizzo_IP_pubblico
Power over Ethernet (2015, June 8). Wikipedia, The free encyclopedia. http://it.wikipedia.org/wiki/Power_over_Ethernet
Port forwarding. (2015, June 8). Wikipedia, The free encyclopedia. http://it.wikipedia.org/wiki/Power_over_Ethernet
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