A level Computer Networks - Data Communication and Network Security Quiz 3

15 Questions

Quiz Description

Quiz 3 of Computer Networks in regards to Data communication and Network security may be focusing on Network security. All networks require a data connection in order for information to be shared throughout the network. Also, this network needs a security system that does not allow foreigners to join the network or copy data from the network. This is where we get to network security.

Network security involves access control, virus and antivirus software, application security, network analytics, and so on. It, therefore, protects your network and data from breaches, intrusions, and other threats like viruses and other malware. We can therefore see that strong network security helps reduce the risk of data loss, theft, and sabotage of information/data.

You can always come back for more computer science quizzes and even quizzes on all other subjects of science and even arts. Of course, you can study at your convenient time, so take the quiz and you won’t regret it.

Luck!!

1:

 It is desired to send a sequence of computer screen images over an optical fiber. The screen is 480 x 640 pixels, each pixel being 24 bits. There are 60 screen images per second. How much bandwidth is needed, and how many microns of wavelenth are needed for this band at 1.30 microns? 


Correct
  • 1:
    1.0 x 105 microns
  • 2:
    2 x 105 microns
  • 3:
    2.5 x 105 microns
  • 4:
    5 x 105 microns
2:

Establishing a virtual connection is virtually equivalent to


Correct
  • 1:
    connecting as virtual memory
  • 2:
    placing a telephone call prior to a conversion
  • 3:
    physically connecting a DTE and DCE
  • 4:
    placing a modem prior to a conversion
3:

 
How many digits of the network user Address are known as the DNIC (Data Network Identiication Code) ? 


Correct
  • 1:
    First three
  • 2:
    First five
  • 3:
    First six
  • 4:
    First four
4:

 Which of the following digits are known as the area code of the network user address (NUA) ? 


Correct
  • 1:
    5-7
  • 2:
    1-4
  • 3:
    8-12
  • 4:
    13-14
5:

  Four bits are used for packed sequence numbering in a sliding window protocol used in a computer network. What is the maximum window size ? 


Correct
  • 1:
    4
  • 2:
    8
  • 3:
    15
  • 4:
    16
6:

 A station in a network forward incoming packets by placing them on its shortest output queue. What routing algorithm is being used ? 


Correct
  • 1:
    Static routing
  • 2:
    Hot potato routing
  • 3:
    Floding
  • 4:
    Delta routing
7:

  Which of the following program is used to copy files to or from another using time sharing system over a single link ?


Correct
  • 1:
    VMTP
  • 2:
    UAR
  • 3:
    UUCP
  • 4:
    TFTP
8:

 Working of the WAH generally involves 


Correct
  • 1:
    telephone lines
  • 2:
    micro waves
  • 3:
    satellites
  • 4:
    All of these
9:

  Slotted ALOHA


Correct
  • 1:
    divide time into discrete intervals
  • 2:
    require global time synchronization
  • 3:
    both (a) and (b)
  • 4:
    none of these
10:

 Start and stop bits are used in serial communication for 


Correct
  • 1:
    error detection
  • 2:
    synchronization
  • 3:
    error correction
  • 4:
    slowing down the communication
11:

  In the carrier sense network, if prevailing condition is a 'channel busy', then technique used is


Correct
  • 1:
    non-persistent then it results in randomised wait and sense
  • 2:
    1-persistent then the channel is continually sensed
  • 3:
    p-persistent then randomised retransmission is done .
  • 4:
    both (a) and (b)
12:

  The systems that can be used in both priority and non-priority modes is


Correct
  • 1:
    TDM
  • 2:
    Carrier sense systems
  • 3:
    Register insertion
  • 4:
    all of these
13:

 Which of the following measures the number of lost or garbled messages as a fraction of the total sent in the sampling period ? 


Correct
  • 1:
    Residual error rate
  • 2:
    Transfer failure probability
  • 3:
    Connection release failure probability
  • 4:
    Connection establishment failure probability
14:

 A field in the Ethernet message packet is 


Correct
  • 1:
    type
  • 2:
    data
  • 3:
    address
  • 4:
    non of the above
15:

A bridge has access to which address of a station on the same network ?


Correct
  • 1:
    physical
  • 2:
    network
  • 3:
    service access point
  • 4:
    all of the above

Feature Image

A level Computer Networks - Data Communication and Network Security Quiz 3
gcequiz
Student
Instructor
Account
Contact us

Efoulan, Yaounde
Cameroon, Email:info@gcequiz.com