Glossary - Speco D8HS Installation Manual

Glossary

This section includes terminology used throughout the manual. For further information on any term, type the name in
Google with "wiki" at the end to see a complete definition.
1. DDNS - Dynamic DNS is a method, protocol, or network service that provides the capability for a networked
device, such as a router or computer system using the Internet Protocol Suite, to notify a domain name server to
change, in real time (ad-hoc) the active DNS configuration of its configured hostnames, addresses or other
information stored in DNS
2. DHCP - Dynamic Host Configuration Protocol (DHCP) is a network application protocol used by devices (DHCP
clients) to obtain configuration information for operation in an Internet Protocol network.
3. DVR - Digital Video Recorder. This is typically an analog camera based recording system that provides a common
interface into 4 to 16 cameras. In contrast, an NVR (Network Video Recorder) provides an IP based interface to
cameras.
4. IP - Internet Protocol address. IP addresses are used to identify the I-View server, the site containing the DVR
and the DVR itself. The site and I-View IP addresses are Internet routable which means they can be anywhere
on the Internet. The DVR typically has an private address which is specific to the site. This is why the
router/firewall at the site that faces the Internet must contain a port forwarding entry to allow for messages to
be passed to the DVR from I-View as well as the DVR to communicate with the I-View via an SMTP email
message or in response to a request for a clip or live view.
5. MAC Address - A media access control address (MAC address) is a unique identifier assigned to network
interfaces for communications on the physical network segment. MAC addresses are used as a network address
for most IEEE 802 network technologies, including Ethernet. Essentially, the MAC address can be thought of as
one layer above the physical medium, e.g. wire or cable, and one level below the IP address. The MAC address
is often assigned by the manufacturer.
6. Private Network - In the Internet addressing architecture, a private network is a network that uses private IP
address space, following the standards set by RFC 1918 for IPv4 and RFC 4193 for IPv6. These addresses are
commonly used for home, office, and enterprise local area networks (LANs), when globally routable addresses
are not mandatory, or are not available for the intended network applications. Under Internet Protocol IPv4,
private IP address spaces were originally defined in an effort to delay IPv4 address exhaustion, but they are also
a feature of the next generation Internet Protocol, IPv6.
7. SMTP - Simple Mail Transfer Protocol is an Internet standard for electronic mail (e-mail) transmission across
Internet Protocol (IP) networks.
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