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Cable Certifier
A very powerful cable testing device used by professional installers to test the electrical characteristics of a cable and then generate a certification report, proving that cable runs pass TIA/EIA standards.
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Voltage Event Recorder
Tracks voltage over time by plugging into a power outlet.
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Temperature Monitor
Device for keeping a telecommunications room at an optimal temperature.
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Protocol Analyzer
A tool that monitors the different protocols running at different layers on the network and that can give Application, Session, Network, and Data Link layer information on every frame going through a network.
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Multimeters
A tool for testing voltage (AC and DC), resistance, and continuity.
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Toners
Generic term for two devices used together-a tone generator and a tone locator(probe)-to trace cables by sending an electrical signal along a wire at a particular frequency. The tone locator then emits a sound when it distinguishes that frequency. Fox & Hound.
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Butt Set
Device that can tap into a 66-or 110-punchdown block to see if a particular line is working.
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ipconfig
a command-line utility for Windows that displays the current TCP/IP configuration of the machine; similar to UNIX/Linux's ifconfig.
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Ping (Packet Internet Groper)
A small network message sent by a computer to check for the presence and response of another system. A ping uses ICMP packets.
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Internet Control Message Protocol (ICMP)
Protocol in which messages consist of a single packet and are connectionless. ICMP packets determine connectivity between two hosts.
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Arping
A command used to discover hosts on a network, similar to ping, but that relies on ARP rather than ICMP. The arping command won't cross any routers, so it will only work within a broadcast domain.
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Domain Information Groper (DIG)
Command-line tool in non-Windows systems used to diagnose DNS problems.
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nslookup
A once handy tool that advanced techs used to query the functions of DNS servers. Most DNS servers now ignore all but the most basic nslookup queries.
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route
A command that enables a user to display and edit the local system's routing table.
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netstat
a universal command-line utility used to examine the TCP/IP connections open on a given host.
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nbstat
A command line utility used to check the current NetBIOS name cache on a particular machine. The utility compares BIOS names to their corresponding IP addresses.
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Port scanner
Is a program that probes on another system, logging the state of the scanned ports. These tools are used to look for unintentionally opened ports that might make a system vulnerable to attack.
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Proxy ARP
The process of making remotely connected computers act as though they are on the same LAN as local computers.
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