HIKVISION DS-9500 Series NVR, User Manual, Page: 72 / 76

User Manual of DS-9500 Series NVR
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Glossary
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.
NTP
Acronym for Network Time Protocol. A protocol designed to synchronize the clocks of computers over a network.
PPPoE
PPPoE, Point-to-Point Protocol over Ethernet, is a network protocol for encapsulating Point-to-Point Protocol
(PPP) frames inside Ethernet frames. It is used mainly with ADSL services where individual users connect to the
ADSL transceiver (modem) over Ethernet and in plain Metro Ethernet networks.
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.
MTU
Maximum Transmission Unit. Unit is represented by bytes. MTU of most network devices is 1500. If it’s bigger
than gateway MTU, the data packets will be split into smaller ones for transmission. In this case, there will be
pieces of data packet causing packet loss ratio to raise and slow down network speed. When MTU is preset smaller
than the gateway MTU, the packet loss ratio will decrease.
NVR
Acronym for Network Video Recorder. An NVR can be a PC-based or embedded system used for centralized
management and storage for IP cameras, IP Domes and other DVRs.