FAQ Glossary

Title Definition
SKU A SKU is a number or string of alpha and numeric characters that uniquely identify a product. Zmodo products have a white label on the bottom with an SKU number.
SMTP Simple Mail Transfer Protocol (SMTP) is an Internet standard for electronic mail (e-mail) transmission across Internet Protocol (IP) networks.
SSID An SSID is used for naming wireless networks. When multiple wireless networks overlap in a certain location, SSIDs make sure that data gets sent to the correct destination.
STATIC A static IP address is “permanent” address associated with a single computer or device. This differs from a dynamic IP address, which is can frequently change from one session to the next.
SUBNET MASK A subnet mask is a number that defines a range of IP addresses that can be used in a network. Subnet masks are used to designate subnetworks, or subnets, which are typically local networks (LANs) that are connected to the Internet.
SWITCH A switch is used to network multiple computers together. Switches made for the consumer market are typically small, flat boxes with 4 to 8 Ethernet ports. These ports can connect to computers, cable or DSL modems, and other switches.
TCP/IP Stands for "Transmission Control Protocol/Internet Protocol." These two protocols were developed in the early days of the Internet by the U.S. military. The purpose was to allow computers to communicate over long distance networks.
TVL The term “TV lines” refers to the number of discernable horizontal or vertical lines on the screen. The TVL resolution refers to the FINAL resolution of the camera. 480 or greater is considered High Definition.
UDP Stands for "User Datagram Protocol." It is part of the TCP/IP suite of protocols used for data transferring. UDP is a known as a "stateless" protocol, meaning it doesn't acknowledge that the packets being sent have been received. For this reason, the UDP protocol is typically used for streaming media. While you might see skips in video or hear some fuzz in audio clips, UDP transmission prevents the playback from stopping completely.
UNIX The Unix operating system was first created in Bell Labs way back in the 1960s. It became popular in the 1970s for high-level computing, but not on the consumer level. Since a lot of Internet services were originally hosted on Unix machines, the platform gained tremendous popularity in the 1990s. It still leads the industry as the most common operating system for Web servers. Still, Unix remains somewhat of an ambiguous operating system, as there are many different versions of it. Some examples include Ultrix, Xenix, Linux, and GNU, which, making things even more confusing, all run on a number of different hardware platforms. Most people do not ever need to use Unix, but computer geeks seem to have the need to use it as much as possible.