170GLOSSARY

bit Either of the digits 0 or 1 when used in the binary numeration system. Eight bits equals a single byte.

broadcast All good frames destined for the broadcast address, in other words sent out to all stations on the network. Some broadcasts are limited to the local network, and some broadcasts may cross onto other networks.

client An application that provides a means of configuring data collection. Multiple Traffix Manager clients can be run against a single Traffix Manager server.

community name Also known as community string. SNMP uses community names to limit access to certain device management functions. The community name used when accessing a device determines which functions may be accessed.

CSV format file Comma Separated Value File. Traffix Manager uses raw report data to output reports as CSV files. CSV files can be read into spreadsheets or database applications for further analysis.

data link layer The second layer of the OSI Reference Model. This layer is responsible for controlling message traffic.

default gateway The IP address of a device, usually a router or gateway, to which the probe directs all packets not destined for its subnet.

device A generic term used to refer to any device seen on the network, by way of the addresses recorded in the RMON tables.

device attribute A piece of information about a device; for example, an attribute could be the device’s IP address, or the building in which it is kept.

DHCP Dynamic Host Configuration Protocol. DHCP is a protocol which allows dynamic allocation of IP addresses to devices on a local area network. The system administrator assigns a range of IP addresses to DHCP. Each DHCP-enabled device on the LAN can request an IP address from the DHCP server. DHCP uses a lease concept to respond to a request for an IP address and to grant an IP address to a device. The system administrator can control for how long a client can use a particular IP address.

DNS Domain Name Service. A mapping of host names to IP addresses. When you enter a destination host name, the station asks the DNS server for the IP address associated with the host name. Upon receipt

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HP Transcend Traffix Manager manual Glossary