3Com OFFICE CONNECT CABLE/DSL SECURE GATEWAY 3CR856-95 User Manual

Contents

88software that runs on Windows NT Server, and Windows 95 andWindows 98 will call the server to obtain the address. Windows98 will allocate itself an address if no DHCP server can be found.DNSDomain Name System. DNS allows Internet host computers tohave a domain name (such as 3com.com) and one or more IPaddresses (such as 192.34.45.8). A DNS server keeps a databaseof host computers and their respective domain names and IPaddresses, so that when a domain name is requested (as intyping “3com.com” into your Internet browser), the user is sentto the proper IP address. The DNS server address used by thecomputers on your home network is the location of the DNSserver your ISP has assigned.DSL modemDSL stands for digital subscriber line. A DSL modem uses yourexisting phone lines to send and receive data at high speeds.EthernetA LAN specification developed jointly by Xerox, Intel and DigitalEquipment Corporation. Ethernet networks use CSMA/CD totransmit packets at a rate of 10 Mbps over a variety of cables.Ethernet AddressSee MAC address.Fast EthernetAn Ethernet system that is designed to operate at 100 Mbps.FirewallElectronic protection that prevents anyone outside of yournetwork from seeing your files or damaging your computers.Full DuplexA system that allows packets to be transmitted and received atthe same time and, in effect, doubles the potential throughput ofa link.GatewayA device that acts as a central hub by connecting to eachcomputer's network interface card and managing the data trafficbetween the local network and the Internet.Half DuplexA system that allows packets to transmitted and received, butnot at the same time. Contrast with full duplex.HubA device that regenerates LAN traffic so that the transmissiondistance of that signal can be extended. Hubs are similar torepeaters, in that they connect LANs of the same type; howeverthey connect more LANs than a repeater and are generally moresophisticated.IEEEInstitute of Electrical and Electronics Engineers. ThisAmerican organization was founded in 1963 and sets standardsfor computers and communications.dua08 569-5aaa02.bo o k Pag e 8 8 Thursday , No vem ber 7 , 2002 3:09 PM