Syngress - Eleventh Hour Network+ Exam N10-004 Study Guide (11 ...

Glossary 181
Oscilloscope A cable troubleshooting tool that can determine if there are shorts,
crimps, or attenuation in the cable.
Packet Level Firewall A form of screening router that examines packets based
upon filters that are set up at the network and transport layers of the OSI
network model.
Passenger Protocol The original data being carried.
Peer-to-Peer Network A simple type of network in which the computers on
it act as equals, with each workstation providing access to resources and
data.
Port A single point of connection to a network.
Port Access Entity (PAE) An entity that controls the algorithms and protocols
associated with the authentication mechanisms for a port.
Print Server A client/server role that redirects print jobs from clients to specific
printers.
Protocol Sets of rules that control how the data is sent between computers.
Protocol Analyzers A tool that monitors traffic on the network and displays the
packets that have been transmitted across the network.
Proxy Server A server that performs a function on behalf of another system,
typically browser-based requests to and from the Internet.
Radio Frequency Interference (RFI) RFI is caused by electromagnetic radiation
in the radiofrequency range generated by radio and television broadcast
towers, microwave satellite dishes, appliances, and furnaces.
Router A device that routes data packets across a network by opening the packet
and making routing decisions based on the contents.
Registered Jack (RJ) A connector used with twisted-pair cables.
Repeater A network device that will take a signal that may be weakening and
regenerate it to its original strength so that the data doesn’t corrupt as it
travels over long distances.
Simplex A term used to refer to data moving in a single direction.
Smart Jack A term used to describe the box (or case) and internal cards (and
other hardware) where you terminate your router or switching device to get
access to the lease line company’s circuit.
Switch A switch stores Layer 2 address information (MAC addresses) regarding
each host connected to it.
Screened Host Firewall A firewall that has a screening router placed between
the gateway host and the public network.
Screened Subnet Firewall A firewall configuration that isolates the internal
network from the public network.
Sniffing The electronic form of eavesdropping on the communications that
computers transmit across networks.