This post is a compilation of frequently asked PSC questions on the Computer-based topic, 'Computer Networks,' from past years.



Previous Year Repeated PSC Questions on  Computer Networks


  • The environment in which communication over computer network occurs is called – Cyber space. (Junior Instructor Computer Operator and Programming Assistant, 2019)
  • The geometric arrangement of nodes and cables in a network is called – Network Topology. (Computer Operator, Information and Public Relations, 2016)
  • The speed of computers in measured in terms of – MIPS. (Junior Instructor Computer Operator and Programming Assistant, 2019)
  • The speed of data transmission on the internet is measured in – bits per second. (University Assistant, 2019)
  • The amount of data that can be transferred per unit of time is known as – Bandwidth. (Special Branch Assistant Police, 2013)
    • What is the meaning of Bandwidth in a Network? Transmission capacity of communication channels. (Data Entry Operator (Scheduled Tribe Development) 2013)
    • The amount of data that can be sent over a specific connection in a given amount of time is – Bandwidth. (Tradesman (Computer Engineering), 2016)
  • Ethernet technology works through – Cables. (Librarian Gr III, 2024)
  • Which network cable has the highest transmission speed in a network? Optical fiber.  (Junior Instructor Computer Operator and Programming Assistant, 2019)
    • ____________ cable has greater transmission capacity – Optical fiber.  (Instrument Mechanic, 2023)
  • In fiber optic cable, data is transferred in the form of – Light. (Data Entry Operator (Scheduled Tribe Development) 2013)
    • In optical fibre, the information travels in the form of – Light. (Telephone Operator (Degree Level Main Exam), 2023)
  • Basic working principle of Fiber Optics – Total internal reflection. (Data Entry Operator (Scheduled Tribe Development) 2013)
    • In a fibre optic cable, the signal is propagated along the inner core by – Reflection. (Workshop Instructor / Demonstrator / Instructor Gr.II (CSE), 2023)
    • The principle Total Internal reflection used in which one of the communication medium?  (Junior Instructor (Computer Hardware & Network Maintenance), 2023)
    • (A) Coaxial Cable    (B) OFC Cable   (C) UTP Cable   (D) None
  • Which of the following telecommunication medium is having the lowest
    loss? (Telephone Operator (Degree Level Main Exam), 2023)
    • (A) Coaxial Cable    (B) Jelly filled copper cable   (C) Optical fibre cable   (D) Cat 4 cable
  • The core of Optical fiber is made of – Silica or Glass. (Junior Instructor (Electronic Mechanics), 2024)
  • The process of joining two ends of optical fiber using electric or mechanic means is – Splicing. (Junior Instructor (Electronic Mechanics), 2024) 
  • Which category of Ethernet cable is suitable only for voice communication? CAT 1. (Programmer cum Operator, 2023)
  • ISDN stands for –  Integrated Services Digital Network. (Administrative Officer, KSRTC 2015)
  • ISDN provide –––––––––––– of fully integrated digital services to the users – Three kind. (Librarian Gr III, 2024)
  • In internet, private addresses are never routed between carriers. The usage of private addresses is specified in – RFC 1918. (Sub Inspector (Trainee), 2023)
  • The most recent standard in the IEEE 802.11 series published in the year 2021 is – 802.11ax. (Workshop Instructor (Computer Hardware & Maintenance, 2024)
  • ADSL stands for – Asymmetric Digital Subscriber Line. (Junior Instructor (Computer Hardware and Network Maintenance), 2019)
  • Which is used as a abbreviation to DSL Service in general? xDSL. (ICDS Supervisor, 2017)
  • A protocol specification for exchanging  structured information in the implementation of web services in computer networks – SOAP ( Simple Object Access Protocol). (Programmer PSC, 2015)
  • Which of the following is not a internet access method?  (Accountant, 2014)
    • (A) DSL      (B) Dial Up      (C) Podcast     (D) Cable
  • Global System for Mobile (GSM) is a globally accepted standard for digital cellular
    communication that is created first time in which generations of mobile communication – (Assistant/ Jr. Clerk/ Jr. Assistant/LD Clerk etc, 2021)
    (A) First Generation networks          (B) Second Generation networks
    (C) Third Generation networks         (D) Fourth Generation networks
  • Which generation of network is supposed to enable streaming multimedia, HDTV content,
    Digital Video Broadcasting and ultra-broadband in Internet access? 4G. (IT Officer, 2023) 


Types of Computer Networks



LAN (Local Area Network)


  • A network of computers and other devices that is confined to a relatively small space is called – LAN. (Tracer -Soil Survey and Soil Conservation, 2019)
    • ഒരു കെട്ടിടത്തിന്റെയോ, ഓഫീസിന്റെയോ ഉള്ളിലുള്ള കമ്പ്യൂട്ടറുകളെ തമ്മിൽ പരസ്പരം ബന്ധിപ്പിക്കുന്ന നെറ്റ് വർക്കാണ്? LAN.  (ICDS Supervisor, 2021)
    • __________ is a private computer network owned by a company or an organization and is accessible only to its employees – Local Area Network. (Special Branch Assistant Police, 2013)
    • A group of interconnected computers that allow several people at the same business site to access the same set of documents – LAN. (Lecturer in Printing Technology, 2023)
  • LAN is useful for small distance communication – Upto 5 kms. (Instrument Mechanic, 2023)
  • Internal communication within institution is done through – LAN. (Tradesman (Information Technology), 2016) 
  • An important characteristic of LAN is – Application independent interfaces. (Deputy Manager, 2023)
  • Which network type tends to exhibit higher data transfer rates? LAN. (Assistant/ LDC/Cashier/Branch Manager, 2024)
  • A topology that is responsible for describing the geometric arrangement of components that make up the LAN – Physical.  (Workshop Instructor / Demonstrator / Instructor Gr.II (CSE), 2023)


MAN (Metropolitan Area Network)


  • MAN-ന്റെ പൂർണ രൂപം – Metropolitan Area Network. (Assistant Salesman, 2021)
  • A computer network that spans an area about the size of a city is called – MAN. (Assistant Information Officer, 2024)
  • കേബിൾ ടി.വി. ശൃംഖല ഏതുതരം നെറ്റ്‌വർക്കിന്‌ ഉദാഹരണമാണ്  – മെട്രോപൊളിറ്റൻ ഏരിയ നെറ്റ്‌വർക്ക്. (Village Extension Officer, 2021)
    • Which type of network is used in Cable Television Network? MAN. (Station Officer(Trainee), 2023)
  • Metropolitan Area Network (MAN) is of size between – Between LAN and WAN. (Librarian Gr III, 2024)


WAN (Wide Area Network)


  • Internet is a – WAN.  (Clerk Typist/Typist Clerk, 2021).
    • Internet is an example of – WAN.  (Reporter Grade II (Malayalam), 2023)
  • Internet uses – Packet switching. (Junior Instructor (Software Testing Assistant), 2019)
  • Telecommunication network usually used for connecting computers through public networks such as telephone, leased lines or satellites, is – WAN.  (Copy Holder, 2023)
  • Identify the OSI model layer that is mainly used by a Wide Area Network (WAN) – Physical Layer and Data Link Layer. (Assistant Information Officer, 2024)
  • Which type of network is used to connect multiple networks over large geographical areas, such as countries or continents? WAN. (Clerk/Cashier, Kerala Bank, 2024)
  • റെയിൽവേ റിസർവേഷൻ സിസ്റ്റം ഏത് നെറ്റ് വർക്കിന്‌ ഉദാഹരണമാണ്? WAN.  (LDC/Sergeant, 2023)

PAN (Personal Area Network)


  • The computer network that connects computers/devices within the range of an individual person, that provides a network range within a person’s range typically within a range of 10 meters – PAN. (Junior Instructor (Computer Hardware & Network Maintenance), 2023)


WLAN (Wireless Local Area Network)


  • The IEEE standard for wireless LAN is – 802.11.  (Accountant, 2014)
    • IEEE 802.11 is standard for – Wireless Local Area Network.  (Junior Instructor (Network Technician), 2015)
  • WiFi is an IEEE _________  WLAN – 802.11 Standard. (Tradesman Information Technology, 2023)
  • Full form of WiFi – Wireless Fidelity. (Junior Instructor (Network Technician), 2015; Tradesman (Information Technology), 2024)
  • WPA2 is used for security in – wi-fi.  (Dairy Farm Instructor, 2020)
  • The minimum and maximum frame length of IEEE 802 LAN in bytes – 64 and 1518. (Workshop Instructor / Demonstrator / Instructor Gr.II (CSE), 2023)
  • FireWire is another name for the __ interface – IEEE 1394. (ICDS Supervisor, 2017)
  • _______ is a term used for a practice where people travel around the city with a specialized device, searching for unprotected WLAN – Hotspots.  (ICDS Supervisor, 2017)
  • Which IT communication technology is frequently used for contactless payments and keyless entry systems and allows the exchange of data between devices over short distances? Near Field Communication. (Junior Instructor (Multimedia Animation & Special Effects), 2023)


VLAN


  • The value of MTU size in the default VLAN configuration is – 1500. (Workshop Instructor (Computer Hardware & Maintenance, 2024)
  • Which one of the following represent to the Virtual LAN (VLAN) from IEEE 802 project? (Jr Instructor (Computer Hardware & Network Maintenance), 2023)
    • (A) IEEE 802 1Q           (B) IEEE 802 1M
    • (C) IEEE 802 1N            (D) IEEE 802 1V 


Bluetooth


  • Bluetooth is a – wireless network.  (Accountant, 2014)
  • Bluetooth can be used for ________ communication – Short distance. (Reporter Grade II (Malayalam), 2023)  
  • Bluetooth operates in the range –  2400-2483.5 MHz.  (Junior Instructor (Network Technician), 2015)
  • Bluetooth is a technology using – High Frequency Radio waves. (Assistant Grade-II, Kerala Veterinary University 2014)
    • Bluetooth technology uses ____ signals for data transmission – Radio waves. (Assistant Information Officer, 2017)
    • When devices communicate using Bluetooth terminology, they use – Radio waves. (HSST Computer Science, 2024)
    • ഏത് തരംഗങ്ങളാണ് ബ്ലൂടൂത്ത് സംവിധാനത്തിൽ ഉപയോഗിക്കുന്നത്? റേഡിയോ തരംഗം. (Village Field Assistant, Cobbler etc (SSLC Level Main Exam 2022), 2023)
  • Which wireless technology link is used for mobile phone data transfer? Bluetooth. (Junior Instructor (Electronic Mechanics), 2024)
  • Bluetooth technology is the implementation of a protocol defined by the standard – IEEE 802.15. (Programmer PSC, 2015)
  • For pairing Bluetooth devices, it needs – Passcode.  (Junior Instructor (Computer Operator & Programming Assistant), 2023)
  • Maximum number of devices connected to Bluetooth – 8.  (Junior Instructor (Computer Operator & Programming Assistant), 2023)
    • What is the maximum number of slave devices that can be supported in a Bluetooth network? 7. (Programmer cum Operator, 2023)
  • How many channels do Bluetooth radio layer consists of? 79 channels. (IT Officer, 2023) 
  • Which modulation mechanism is used in bluetooth technology to transform bits to a signal? Gaussian frequency shift keying (GFSK). (Head of Section Computer Engineering, 2019)
  • Consider the following features of Bluetooth Connectivity –  (Junior Project Assistant, 2023)
    • a.  It is long range wireless technology used for exchange of data
    • b.  It work within the range of 0-400 m.
    • c.  International Agency for cancer has listed Bluetooth transmission in the carcinogen list.
    • (A) b only    (B) a and b   (C) b and c   (D) All of the above
  • Which among the following features of your phone can be used to share Internet from your phone? (Clerk cum Typist (Degree Level Main Exam), 2023)
    • (A) Bluetooth                         (B) Wi-Fi
    • (C) WiMAX                           (D) None of the above


CAN (Controller Area Network)


  • The ____________ Network is serial communication protocol suited for networking sensors, actuators and other electronic devices in vehicles – CAN.  (Lecturer in Automobile Engineering, 2023)
  • How many bits in standard CAN Base Frame format? 11 bits identifier. (Lecturer in Automobile Engineering, 2023)


Statement Questions


  • Consider the following statements:   (Cashier/Field Officer, 2023)
    • (i) LAN is connected through wire transmission only. 
    • (ii) Internet is considered as a MAN. 
    • (iii) WAN has the highest speed network than other network connections. 
    • Which among the above statements is / are correct? 
      • (A) (i) only           (B) (i) and (iii)           (C) (ii) and (iii)        (D) none of the above 
  •  In the following statements which is correct in networking:  (State Tax Officer 2023)
    • (A) In LAN the congestion in the network is very low than MAN 
    • (B) In MAN exhibits higher network congestion than LAN 
    • (C) In WAN it exhibits a higher congestion in the network than MAN 
    • (D) All of the above 
  • What type of network is capable of transmitting voice, video, and data?   (Junior Systems Officer, 2024) 
    • (A) Local Area Network                    (B) Metropolitan Area Network
    • (C) Wide Area Network                     (D) All of the above

Thanks for reading!!!