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Quiz on computer network, created by hattan altiyare on 08/12/2017.

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computer network

Question 1 of 26

1

check the right statements about OSI?

Select one or more of the following:

  • it stands for Open Systems Interconnection

  • it is a nice computer brand

  • has seven layers

  • started in 1983 by ITU and then in 1984 presented as layered model by ISO

  • it is a standard related to the H.W in computer network

Explanation

Question 2 of 26

1

in OSI model SAP is between layers in the same systems and protocol is between peer layers in different systems?

Select one of the following:

  • True
  • False

Explanation

Question 3 of 26

1

in the case of transmitting data which comes first packet or frame ?

Select one of the following:

  • packet

  • frame

Explanation

Question 4 of 26

1

in OSI model PDU = PCI + SDU ?

Select one of the following:

  • True
  • False

Explanation

Question 5 of 26

1

the lower four layers of OSI model called ~~oriented layers ?

Select one of the following:

  • transmission

  • tracking

  • telecommunication

  • transport

  • technical

Explanation

Question 6 of 26

1

the higher three layers of OSI model is called ~~oriented layers

Select one of the following:

  • programming

  • application

  • processing

  • software

Explanation

Question 7 of 26

1

you can have time, frequency, space, code~~

Select one of the following:

  • adding

  • division multiplexing

  • process multiplexing

  • forward multiplexing

Explanation

Question 8 of 26

1

MAC address is temporary ?

Select one of the following:

  • True
  • False

Explanation

Question 9 of 26

1

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

Select one of the following:

  • True
  • False

Explanation

Question 10 of 26

1

the number of layers in internet model is

Select one of the following:

  • four layers (app. transport, internet IP, subnetwork)

  • four layers (app. transmission , internet IP, subnetwork)

  • three layers (app. transport, internet IP)

  • five layers (app. transport, internet IP, data link, physical)

Explanation

Question 11 of 26

1

IP, TCP, UDP protocols are the basis of the internet

Select one of the following:

  • True
  • False

Explanation

Question 12 of 26

1

Bandwidth is the capacity to carry --

Select one of the following:

  • food

  • information

  • cars

  • heat

  • people

Explanation

Question 13 of 26

1

bandwidth could be divided into --

Select one of the following:

  • sub bandwidth

  • channels

  • network

  • houses

Explanation

Question 14 of 26

1

which are the correct sentences ?

Select one or more of the following:

  • repeater and hub cover only layer one in
    osi model

  • bridges and switches cover layers one and two in OSI model

  • gateway could cover all layers in OSI model

  • router covers layer four only

  • router covers layers from 3 to 1

  • modem covers layers 5 and 6

Explanation

Question 15 of 26

1

Bit rate could be higher than Baud rate if No. of signal levels ( V ) is higher than 3

Select one of the following:

  • True
  • False

Explanation

Question 16 of 26

1

data encoding techniques for Analog signal of Digital single are --- shifting key

Select one or more of the following:

  • amplitude, time, space

  • amplitude, frequency, speed

  • amplitude, frequency, phase

  • time, distance, speed

Explanation

Question 17 of 26

1

data encoding techniques for Analog signal of Analog single are

Select one of the following:

  • AM, FM, PM

  • GM, FM, CM

  • VM, TM, AM

Explanation

Question 18 of 26

1

data encoding techniques for Digital signal of Digital single are:

Select one of the following:

  • manchester, Nonretuern-to-zero level , Nonretuern-to-zero, invert on ones

  • AM

  • time modulation

  • FM

  • Nonretuern-to-zero, invert on ones

Explanation

Question 19 of 26

1

data encoding techniques for Digital signal of Analog single are:

Select one of the following:

  • puls code modulation PCM

  • amplitude code modulation

  • frequency code modulation

Explanation

Question 20 of 26

1

propagation effect includes the following items

Select one or more of the following:

  • noise

  • attenuation

  • filtering

  • modulation

  • distortion

  • interface

Explanation

Question 21 of 26

1

digital signal could be compressed but it can't be re-teansmitted

Select one of the following:

  • True
  • False

Explanation

Question 22 of 26

1

with IP address there is another term

Select one of the following:

  • subnet mask

  • tiger mask

  • internet mask

  • application mask

Explanation

Question 23 of 26

1

in multiplexing is used we look for either parallel access or

Select one or more of the following:

  • shifted access

  • avoid accidents between signals

  • Try to make accidents between signals impossible

  • time access

Explanation

Question 24 of 26

1

there are always two IP addresses reserved to network IP and Broadcast

Select one of the following:

  • True
  • False

Explanation

Question 25 of 26

1

as an analogy if the multiplexing tech, was the car, what is the operation mode?

Select one of the following:

  • gasoline

  • wheels

  • AT or MT

Explanation

Question 26 of 26

1

The four techniques of multiplexing have be used exclusively

Select one of the following:

  • True
  • False

Explanation

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