Viking E-20 Product Manual page 3

Definitions
Client: A computer or device that makes use of a server. As an example, the client might request a particular file from the
server.
DHCP: Dynamic Host Configuration Protocol. In this procedure the network server or router takes note of a client's MAC
address and assigns an IP address to allow the client to communicate with other devices on the network.
DNS Server: A DNS (Domain Name System) server translates domain names (ie: www.vikingelectronics.com) into an IP
address.
Ethernet: Ethernet is the most commonly used LAN technology. An ethernet Local Area Network typically uses twisted
pair wires to achieve transmission speeds up to 1Gbps.
Host: A computer or device connected to a network.
Host Name: A host name is a label assigned to a device connected to a computer network that is used to identify the device
in various forms of network communication.
Hosts File: A file stored in a computer that lists host names and their corresponding IP addresses with the purpose of map-
ping addresses to hosts or vice versa.
Internet: A worldwide system of computer networks running on IP protocol which can be accessed by individual computers
or networks.
IP: Internet Protocol is the set of communications conventions that govern the way computers communicate on networks
and on the Internet.
IP Address: This is the address that uniquely identifies a host on a network.
LAN: Local Area Network. A LAN is a network connecting computers and other devices within an office or building.
Lease: The amount of time a DHCP server reserves an address it has assigned. If the address isn't used by the host for
a period of time, the lease can expire and the address can be assigned to another host.
MAC Address: MAC stands for Media Access Control. A MAC address, also called a hardware address or physical address,
is a unique address assigned to a device at the factory. It resides in the device's memory and is used by routers to send
network traffic to the correct IP address. You can find the MAC address of your E-10/20/30-IP phone printed on a white
label on the top surface of the PoE LAN port.
Router: A device that forwards data from one network to another. In order to send information to the right location, routers
look at IP Address, MAC Address and Subnet Mask.
Server: A computer or device that fulfills requests from a client. This could involve the server sending a particular file re-
quested by the client.
Session Initiation Protocol (SIP): Is a signaling communications protocol, widely used for controlling multimedia commu-
nication sessions such as voice and video calls over Internet Protocol (IP) networks. The protocol defines the messages
that are sent between endpoints, which govern establishment, termination and other essential elements of a call.
Static IP Address: A static IP Address has been assigned manually and is permanent until it is manually removed. It is not
subject to the Lease limitations of a Dynamic IP Address assigned by the DHCP Server.
WAN: Wide Area Network. A WAN is a network comprising a large geographical area like a state or country. The largest
WAN is the Internet.
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