Question 1
Question
check the right statements about OSI?
Answer
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it stands for Open Systems Interconnection
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it is a nice computer brand
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has seven layers
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started in 1983 by ITU and then in 1984 presented as layered model by ISO
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it is a standard related to the H.W in computer network
Question 2
Question
in OSI model SAP is between layers in the same systems and protocol is between peer layers in different systems?
Question 3
Question
in the case of transmitting data which comes first packet or frame ?
Question 4
Question
in OSI model PDU = PCI + SDU ?
Question 5
Question
the lower four layers of OSI model called ~~oriented layers ?
Answer
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transmission
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tracking
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telecommunication
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transport
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technical
Question 6
Question
the higher three layers of OSI model is called ~~oriented layers
Answer
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programming
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application
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processing
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software
Question 7
Question
you can have time, frequency, space, code~~
Answer
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adding
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division multiplexing
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process multiplexing
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forward multiplexing
Question 8
Question
MAC address is temporary ?
Question 9
Question
the different between ISO model and Hybrid model is that the upper three layers treated as one layer in Hybrid model and called S.W layers
Question 10
Question
the number of layers in internet model is
Answer
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four layers (app. transport, internet IP, subnetwork)
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four layers (app. transmission , internet IP, subnetwork)
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three layers (app. transport, internet IP)
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five layers (app. transport, internet IP, data link, physical)
Question 11
Question
IP, TCP, UDP protocols are the basis of the internet
Question 12
Question
Bandwidth is the capacity to carry --
Answer
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food
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information
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cars
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heat
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people
Question 13
Question
bandwidth could be divided into --
Answer
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sub bandwidth
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channels
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network
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houses
Question 14
Question
which are the correct sentences ?
Answer
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repeater and hub cover only layer one in
osi model
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bridges and switches cover layers one and two in OSI model
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gateway could cover all layers in OSI model
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router covers layer four only
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router covers layers from 3 to 1
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modem covers layers 5 and 6
Question 15
Question
Bit rate could be higher than Baud rate if No. of signal levels ( V ) is higher than 3
Question 16
Question
data encoding techniques for Analog signal of Digital single are --- shifting key
Answer
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amplitude, time, space
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amplitude, frequency, speed
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amplitude, frequency, phase
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time, distance, speed
Question 17
Question
data encoding techniques for Analog signal of Analog single are
Answer
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AM, FM, PM
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GM, FM, CM
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VM, TM, AM
Question 18
Question
data encoding techniques for Digital signal of Digital single are:
Answer
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manchester, Nonretuern-to-zero level , Nonretuern-to-zero, invert on ones
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AM
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time modulation
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FM
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Nonretuern-to-zero, invert on ones
Question 19
Question
data encoding techniques for Digital signal of Analog single are:
Question 20
Question
propagation effect includes the following items
Answer
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noise
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attenuation
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filtering
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modulation
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distortion
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interface
Question 21
Question
digital signal could be compressed but it can't be re-teansmitted
Question 22
Question
with IP address there is another term
Answer
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subnet mask
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tiger mask
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internet mask
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application mask
Question 23
Question
in multiplexing is used we look for either parallel access or
Question 24
Question
there are always two IP addresses reserved to network IP and Broadcast
Question 25
Question
as an analogy if the multiplexing tech, was the car, what is the operation mode?
Question 26
Question
The four techniques of multiplexing have be used exclusively