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Glossary 7
Glossary
Agilent FrameScope Pro User’s Manual 179
Subnet Mask A bit mask used to identify which bits in an IP
address apply to the subnet.
Time to live A field in an IP packet which indicates how long
the packet should be allowed to exist before being discarded.
Tra cero ute A Ping like tool that reports the number of hops to
the destination as well as the time delays to each hop along the
way. Traceroute is useful for locating bottlenecks in network
traffic.
Type of Service A field in an IP packet that controls the quality
of service that the packet requires. The internet is a “best effort”
network, using the Type of Service bits, higher grades of service
can be requested. If the network equipment supports better
service i.e. VoIP, the better service will be provided.
Unicast A frame sent to a specific single destination.
UNIX server A device providing services in a network and
running a version of the Unix operating system. A UNIX server
is usually an NFS server.
Utilization A measure of how much of the network’s bandwidth
is being used. It is usually expressed as a percent of the
maximum line speed in the network. For example, if the
network’s current usage is at 2 Mb/sec and the bandwidth
available (line speed) is 100 Mb/sec., we say the utilization is
2%.
Web Browser The program running in a client host when
someone is interacting with a web server. It is the software used
to browse the Internet.
Web Server A network server that contains files that describe
Internet pages. The pages are usually developed in a language
named Hypertext Markup Language (HTML). A company’s home
page is an example of an HTML file that can be retrieved from a
web server.
WINS Server A type of name server used in the Microsoft NT
environment. WINS stand for Windows Internet Name Services.
It is a variation of DNS.