12. Network Glossary
ISP Gateway Address
The ISP Gateway Address is an IP address for the Internet router located at the ISP's
office.
LAN
Local Area Network 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.
MTU
Maximum Transmission Unit
NAT
Network Address Translator is defined by RFC 1631. Enable a LAN network to use one set
of IP address for internal traffic. A NAT box located where the LAN meets the Internet
provides the necessary IP address translation. This helps provide a sort of firewall and
allow for a wider address range to be used internally without danger of conflict. Using the
router’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 is a list of common applications and protocol/port
numbers:
Application Protocol
Port
Number
Telnet TCP 23
FTP TCP 21
SMTP TCP 25
POP3 TCP 110
H.323 TCP 1720
SNMP UCP 161
SNMP Trap
UDP
162
HTTP TCP 80
PPTP TCP 1723
PC Anywhere
TCP
5631
PC Anywhere
UDP
5632
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AirLive WT-2000ARM User’s Manual
