3Com OfficeConnect User Manual

Also see for OfficeConnect: Datasheet User guide Datasheet Getting started guide User guide

Contents

3Com OfficeConnect User Manual Manual pdf 99 page image

99GLOSSARY10BASE-TThe IEEE specification for 10 Mbps Ethernet over Category 3, 4or 5 twisted pair cable.100BASE-TXThe IEEE specification for 100 Mbps Fast Ethernet over Category5 twisted-pair cable.3DESTriple DES (See DES). 3DES is an extremely secure 168 bitencryption system that works by applying the DES encryptionsystem three times on the same message using different keys. Itis typically used in military applications where it is expected thatthe VPN traffic will be intercepted and an effort made to decodeit.AESAdvanced Encryption Standard. A 256 bit FIPS-approvedsymmetric encryption algorithm that may be used by U.S.Government organizations (and others) to protect sensitiveinformation. AES provides much higher security than 3DES.Auto-negotiationSome devices in the OfficeConnect range supportauto-negotiation. Auto-negotiation is where two devices sharinga link, automatically configure to use the best common speed.The order of preference (best first) is: 100BASE-TX full duplex,100BASE-TX half duplex, 10BASE-T full duplex, and 10BASE-Thalf duplex. Auto-negotiation is defined in the IEEE 802.3standard for Ethernet and is an operation that takes place in afew milliseconds.BandwidthThe information capacity, measured in bits per second, that achannel can transmit. The bandwidth of Ethernet is 10 Mbps, thebandwidth of Fast Ethernet is 100 Mbps.Category 3 CablesOne of five grades of Twisted Pair (TP) cabling defined by theEIA/TIA-586 standard. Category 3 is voice grade cable and canonly be used in Ethernet networks (10BASE-T) to transmit data atspeeds of up to 10 Mbps.Category 5 CablesOne of five grades of Twisted Pair (TP) cabling defined by theEIA/TIA-586 standard. Category 5 can be used in Ethernet(10BASE-T) and Fast Ethernet networks (100BASE-TX) and cantransmit data up to speeds of 100 Mbps. Category 5 cabling isbetter to use for network cabling than Category 3, because itsupports both Ethernet (10 Mbps) and Fast Ethernet (100 Mbps)speeds.ClientThe term used to described the desktop PC that is connected toyour network.DESData Encryption Standard. DES is one of the encryptionprotocols that can be used by an IPSec Virtual Private Network. Itis a strong encryption standard only currently exceeded insecurity by 3DES.dua08609-5aaa01.book Page 99 Thursday, September 11, 2003 12:15 PM