NETWORK+ Terms B's Flashcards
In ISDN, a 64Kbps channel that carries data.
See also D (delta) channel.
B (bearer) channel
A network segment that acts as a trunk between other network segments. ______ typically are high-bandwidth implementations such as fiber-optic cable.
backbone
A document or plan that defines what type of ______ are made, when, and what data
is backed up.
backup schedule
The width of the range of electrical frequencies, or how many channels the medium can support. \_\_\_\_\_\_\_ correlates to the amount of data that can traverse the medium at one time, but other factors determine the maximum speed supported by a cable .
bandwidth
A term applied to any medium that can carry only a single data signal at a time. Compare with broadband.
baseband
A measurement of performance of a device or system for the purposes of future comparison. \_\_\_\_\_ is a common server administration task.
baselining
The speed or rate of
signal transfer. ___ ____ bandwidth
is measured in cycles per second, or
Hertz (Hz).
baud rate
A network wiring closet typically
housing wiring distribution equipment
and hardware. Two common
network
BDF (Building Distribution Frame):
BDFs are the Intermediate
Distribution Frame (IDF) and the
Main Distribution frame (MDF).
In a wireless network, \_\_\_\_\_ refers to the continuous transmission of small packets (beacons) that advertise the presence of a base station (access point).
beaconing
A test to see the number of received bits of
a data stream that has changed due
to noise, interference, or other distortion.
BERT (Bit-Error Rate Test)
Used between gateway hosts on the Internet. \_\_\_\_\_ \_\_\_\_ \_\_\_\_ examines the routing table, which contains a list of known routers, the addresses they can reach, and a cost metric associated with the path to each router so that the best available route is chosen. It communicates between the routers using TCP.
BGP (Border Gateway Protocol.)
A base 2 numbering system
used in digital signaling. It uses only
the numbers 1 and 0.
binary
The process of associating
a protocol with a NIC.
binding
The science and technology of measuring and analyzing biological data. \_\_\_\_\_ is used for security purposes to analyze and compare characteristics such as voice patterns, retina patterns, and hand measurements.
biometrics
A basic set of instructions that a
device needs to operate.
BIOS (Basic Input/Output System)
An electronic digit used in the
binary numbering system. ____ is a
contraction of the terms binary and
digit.
bit
A total loss of electrical
power.
blackout
A low-cost, short-range RF technology designed to replace many of the cords used to connect devices. It uses 2.4GHz RF and provides transmission speeds up to 24Mbps.
Bluetooth
A family of connectors typically associated with thin coaxial cabling and 10Base2 networks. \_\_\_ connectors use a twist-and-lock mechanism to connect devices to the network.
BNC (Bayonet Neill Concelman)
connector
\_\_\_\_\_\_ is a TCP/IP protocol used by a network device to obtain an IP address and other network information such as server address and default gateway.
BOOTP
Describes any medium that has physical constraints, such as coaxial, fiber-optic,
and twisted pair. Compare with
unbound medium.
bound medium
Identifies the status of ports and bridges across the network. \_\_\_\_ are simple data messages exchanged between switches. They contain information on ports and provide the status of those ports to other switches.
BPDU (Bridge Protocol Data Unit)
An ISDN digital communications line that consists of three independent channels: two B channels each at 64Kbps and one D channel at 16Kbps. \_\_\_\_ \_\_\_\_is often referred to as 2B+D.
BRI (Basic Rate Interface)
A device that connects and passes packets between two network segments that use the same communications protocol. \_\_\_\_ operate at the data link layer of the OSI model; filters, forwards, or floods an incoming frame based on the packet’s MAC address.
bridge
A list of MAC addresses that a bridge keeps
and uses when it receives packets.
The bridge uses the ____ ____ ____ to determine which segment
the destination address is on before it
sends the packet to the next interface
or drops the packet (if it is on the
same segment as the sending node).
bridging address table
A communications strategy that uses analog or digital signaling over multiple communications
channels.
broadband
A packet-delivery system
in which a copy of a packet is
transmitted to all hosts attached to
the network.
broadcast
An undesirable condition in which broadcasts become so numerous that they bog down the
flow of data across the network.
broadcast storm
A device that you can use to combine the benefits of both routers and bridges. Its common usage is to route routable protocols at the network layer of the OSI model and to bridge nonroutable protocols at the data link layer.
brouter
A short-term decrease in
the voltage level, usually caused by
the startup demands of other electrical
devices.
brownout
The ___ ____ ____ ___ is the
MAC address of the wireless access
point (AP).
BSSID (Basic Service Set
Identification)
An area of memory in a device used to temporarily store data before it is forwarded to another device or location.
buffer
A linear LAN architecture in which all devices connect to a common cable, called a bus or
backbone.
bus topology
The \_\_\_\_ \_\_\_\_ is typically associated with telephony systems. It is used to test and access the phone line using clip wires that attach to the phone cable.
butt set
A set of bits (usually 8) that
operate as a unit to signify a character.
byte
