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Data and Digital Communications
February 3, 2023
Welcome to your Data and Digital Communications
The entities comprising the corresponding layers on different machine are called _____
protocol.
flow control.
peers.
interface.
__________ is the loss of energy as the signal propagates outward.
Distortion
Baud
Attenuation
Noise.
For large networks _____ topology is normally used
irregular.
star
bus
ring
Which layer of OSI determines the interface of the system with the user?
Data link.
Physical
Network
Application
Datagrams using header extension are called __________
payload
datagram packets
jumbograms
trailer.
The error introduced by the finite number of bits per sample is called the _______ noise
quality
quantization.
stream
error
The application layer of a network ________
consists of software being run on the computer connected to the network
allows communication channel to be shared.
defines the users port into the network
establishes, maintains and terminates virtual circuits
The number of bit positions in which the code words differ is called _______
flow control
error pulse
hamming distance
code distance
Protocols in which the sender sends one frame and then waits for an acknowledgement before proceeding are called __________
sliding window
stop and wait
analog.
frame buffer.
The number of oscillations per second of a wave is called its ______
sequence.
wavelength
spectrum.
frequency.
Polynomial code is also known as __________
ARC
BRC.
DRC
CRC
Terminators are used in ________ topology
irregular.
star
ring
bus
When the packets are small and all the same size, they are often called _______
packet switched
circuit switched.
cells.
virtual circuit.
A _________ network configuration in which all data/information pass through a central computer is star network
ordered.
T – switched
central
distributed
Print server uses spool which is a ______ that holds data before it is send to the printer
ring
node
queue.
buffer
collection of interconnected networks is called as __________
internet.
interface.
intranet.
topology.
The ______ portion of LAN management software restricts access, records user activities and audit data etc.
Resource management
Configuration management
Performance management.
Security management
The data link layer takes the packet it gets from the network layer and encapsulates them into ___________
trailer.
frames.
cells.
packet.
Each end office has a number of outgoing lines to one or more nearby switching canters called ______
toll office
end office
toll connecting trunks
local loop
When a packet with the code is transmitted, it is received and processed by every machine on the network. This mode of operation is called
multi casting.
broadcasting
point-to-point.
unicasting.
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