Local Area Network (LAN) – Network of computers in the same physical location, usually within a building or campus.

Wide Area Network (WAN) – Used when the computers in the network are far apart, as in different cities.

Internet Service Provider (ISP) – Provides a direct connection between the LAN or WAN to the World Wide Web.

Internet Protocol (IP) Address – IP assigns a unique identifier to all computers and other devices connected to the Internet.

Node – Anything connected to the network. Although a node is often a computer, it can also be a printer or an IP Camera.

Segment – Any part of a network that is separated by a hub, switch, bridge or router from another part of the network.

Hub – Connection point for devices in a network. Acts like a traffic cop regulating the flow of cars (or packets of information).

Switch – Like a cloverleaf intersection at the hub; each car takes an entrance ramp to where they want to go without stopping or slowing down.

Bridge – Connects two LANs or two segments of the same LAN using the same protocol, such as Ethernet or Token-Ring.

Router – forwards data packets along networks. They connect at least two networks, usually LANs, WANs or a LAN and its ISP’s network.

Network Interface Card (NIC) – Every computer and most other devices, including IP Cameras, are connected to the network through an NIC. Often, this is an Ethernet card; you’ll find the slot on the back of your computer.

Media Access Control (MAC) Address – Physical address of any device on the network. It identifies the company that made the NIC as well as the serial number of the specific NIC.

DDNS server provides a database containing relations between domain names and numeric addresses which may be updated on request by the domain owner. Thanks to this feature, the server is available in the domain name regardless its current Ip address.

We have to remember that when DHCP server changes (your modem restart) the IP, it takes some time to detect this change by your router. Then after the notification has been sent to DDNS server it takes another minute or so to send this piece of data to DNS server to update the database. As a result, your server will be periodically unavailable up to several minutes every time the IP address has been changed.

If you want to use the service you need to register at a DDNS server listed below:

• DynDNS
• ZoneEdit
• No-IP
• TZO
• easyDNS

If you want a professional service to do the work, you may call us to schedule an appointment.