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Appendix B: Glossary

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

work. 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 hav-

ing 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

PPPoE: Point-to-Point Protocol over Ethernet. Point-to-Point Protocol is a secure data transmission method originally created for

dial-up connections; PPPoE is for Ethernet connections. PPPoE relies on two widely accepted standards, Ethernet and the Point-to-

Point Protocol. It is a communications protocol for transmitting information over Ethernet between different manufacturers.

Protocol: A protocol is a set of rules for interaction agreed upon between multiple parties so that when they interface with each

other based on such a protocol, the interpretation of their behavior is well defined and can be made objectively, without confu-

sion or misunderstanding.

Access point: An access point is an intelligent network device that forwards packets between different networks based on net-

work layer address information such as IP addresses.

Subnet mask: A subnet mask, which may be a part of the TCP/IP information provided by your ISP, is a set of four numbers (e.g.

255.255.255.0) configured like an IP address. It is used to create IP address numbers used only within a particular network (as

opposed to valid IP address numbers recognized by the Internet, which must be assigned by InterNIC).

TCP/IP, UDP: Transmission Control Protocol/Internet Protocol (TCP/IP) and Unreliable Datagram Protocol (UDP). TCP/IP is the stan-

dard protocol for data transmission over the Internet. Both TCP and UDP are transport layer protocol. TCP performs proper error

detection and error recovery, and thus is reliable. UDP on the other hand is not reliable. They both run on top of the IP (Internet

Protocol), a network layer protocol.

WAN: Wide Area Network. A network that connects computers located in geographically separate areas (e.g. different buildings,

cities, countries). The Internet is a wide area network.

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Black Box WAP-300BGN Spécifications Page 58