User`s manual

4-2. Glossary

Default Gateway (Access point): Every non-access point IP device needs to configure a default gateway’s IP

address. When the device sends out an IP packet, if the destination is not on the same network, the device has

to send the packet to its default gateway, which will then send it out towards the destination.

DHCP: Dynamic Host Configuration Protocol. This protocol automatically gives every computer on your home

network an IP address.

DNS Server IP Address: DNS stands for Domain Name System, which allows Internet servers to have a domain

name (such as www.Broadbandaccess point.com) and one or more IP addresses (such as 192.34.45.8). A DNS

server keeps a database of Internet servers and their respective domain names and IP addresses, so that when a

domain name is requested (as in typing "Broadbandaccess point.com" into your Internet browser), the user is

sent to the proper IP address. The DNS server IP address used by the computers on your home network is the

location of the DNS server your ISP has assigned to you.

DSL Modem: DSL stands for Digital Subscriber Line. A DSL modem uses your existing phone lines to transmit data

at high speeds.

Ethernet: A standard for computer networks. Ethernet networks are connected by special cables and hubs, and

move data around at up to 10/100 million bits per second (Mbps).

Idle Timeout: Idle Timeout is designed so that after there is no traffic to the Internet for a pre-configured

amount of time, the connection will automatically be disconnected.

IP Address and Network (Subnet) Mask: IP stands for Internet Protocol. An IP address consists of a series of four

numbers separated by periods, that identifies a single, unique Internet computer host in an IP network.

Example: 192.168.0.2. It consists of 2 portions: the IP network address, and the host identifier.

ISP Gateway Address: (see ISP for definition). The ISP Gateway Address is an IP address for the Internet access

point located at the ISP's office.

ISP: Internet Service Provider. An ISP is a business that provides connectivity to the Internet for individuals and

other businesses or organizations.

LAN: Local Area Network. A LAN is a group of computers and devices connected together in a relatively small

area (such as a house or an office). Your home network is considered a LAN.

MAC Address: MAC stands for Media Access Control. A MAC address is the hardware address of a device

connected to a network. The MAC address is a unique identifier for a device with an Ethernet interface. It is

comprised of two parts: 3 bytes of data that corresponds to the Manufacturer ID (unique for each manufacturer),

plus 3 bytes that are often used as the product’s serial number.

NAT: Network Address Translation. This process allows all of the computers on your home network to use one IP

address. Using the broadband access point’s NAT capability, you can access the Internet from any computer on

your home network without having to purchase more IP addresses from your ISP.

Port:

Network Clients (LAN PC) uses port numbers to distinguish one network application/protocol over another.

Below you will find a list of some common used ports and their corresponding application:

Port Application Port Application

20 FTP data (FTP server) 80 HTTP (Web server)

21 FTP data (FTP server) 110 POP3 (Mail server – incoming)

22 SSH (Secure shell) 2000 Remotely Anywhere

23 Telnet 5800 VNC

25 SMTP (Mail server – outgoing) 5900 VNC

For more ports and their corresponding applications, see http://portforward.com/cports.htm.