Computer Networking
MCQ questions and answers
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Computer Networking MCQ (96)
| 1. | ____ is a variation of the packet arrival time. |
| A | Timeliness |
| B | Jitter |
| C | Accuracy |
| D | Delay |
| Answer: B | |
| 2. | In_____ mode of communication, the station can transmit and receive data, not at the same time? |
| A | Simplex |
| B | Full duplex |
| C | Half duplex |
| D | Duplex |
| Answer: C | |
| 3. | In which topology, every device has a dedicated link (point to point) with every connected device? |
| A | Star |
| B | Bus |
| C | Ring |
| D | Mesh |
| Answer: D | |
| 4. | When one node sends data to another, the data passes through each intermediate node on the ring until it reaches its destination is called ____ |
| A | Star topology |
| B | Bus topology |
| C | Ring topology |
| D | Mesh topology |
| Answer: C | |
| 5. | _____ is a set of rules used for data communications. |
| A | Protocols |
| B | Semantics |
| C | TCP/IP |
| D | OSI model |
| Answer: A | |
| 6. | ______ is used to carry a data over the physical medium? |
| A | Network layer |
| B | Transport layer |
| C | Physical layer |
| D | Presentation layer |
| Answer: C | |
| 7. | Which layer is used to move the frame from one hop to the next hop? |
| A | Physical layer |
| B | Datalink layer |
| C | Transport layer |
| D | Network layer |
| Answer: B | |
| 8. | _____ is a digital data transmission unit in computer networking and telecommunication. |
| A | packet |
| B | frame |
| C | message |
| D | none of these |
| Answer: B | |
| 9. | Which OSI layer is responsible for the delivery of an individual packet from the source to destination host? |
| A | Network layer |
| B | Transport layer |
| C | Session layer |
| D | Data link layer |
| Answer: A | |
| 10. | Which layer is responsible for end-to-end communication over a network? |
| A | Session layer |
| B | Application layer |
| C | Network layer |
| D | Transport layer |
| Answer: D | |
| 11. | Which layer is responsible for translation, compression, and encryption? |
| A | Application |
| B | Presentation layer |
| C | Session layer |
| D | Data link layer |
| Answer: B | |
| 12. | Which OSI layer is responsible for providing a services to the user? |
| A | Data link layer |
| B | Data link layer |
| C | Application layer |
| D | Physical layer |
| Answer: C | |
| 13. | What is the length of a port address in the TCP/IP protocol? |
| A | 8 bit |
| B | 16 bit |
| C | 1024 bit |
| D | 32 bit |
| Answer: B | |
| 14. | ______ has a discrete state in the communication. |
| A | Analog data |
| B | Digital data |
| C | Electromagnetic signal |
| D | None |
| Answer: B | |
| 15. | __________ analog signal and __________ digital signals are used for data communications. |
| A | non-periodic, periodic |
| B | periodic, discrete |
| C | periodic, non-periodic |
| D | continuous, discrete |
| Answer: C | |
| 16. | _____ is the rate of change with respect to the time. |
| A | Frequency |
| B | Amplitude |
| C | Wave |
| D | Intensity |
| Answer: A | |
| 17. | The loss of frequency is known as _____? |
| A | Distortion |
| B | Attenuation |
| C | Noise |
| D | Latency |
| Answer: B | |
| 18. | _______ is the fundamental maximum transmission capacity that can be achieved on a channel given any combination of any coding scheme, transmission or decoding scheme. |
| A | Shannon’s capacity limit |
| B | Medium capacity limit |
| C | von neumann capacity limit |
| D | None |
| Answer: A | |
| 19. | ______ is a standard unit for measuring the strength of Wi-Fi wireless radio signals |
| A | Attenuation |
| B | Decibel |
| C | Baud rate |
| D | Amplitude |
| Answer: B | |
| 20. | Modulation uses the __________. |
| A | broadband channel |
| B | lowpass channel |
| C | bandpass channel |
| D | high bandwidth channel |
| Answer: C | |
| 21. | __________ transmission means sending a digital signal over a channel without conversion of the original signal. |
| A | Baseband |
| B | Broadband |
| C | Lowpass channel |
| D | Wide bandwidth |
| Answer: A | |
| 22. | In baseband transmission, required ______ is proportional to the bit rate. |
| A | Frequency |
| B | Bandwidth |
| C | Harmonics |
| D | Attenuation |
| Answer: B | |
| 23. | ______is a standard unit for measuring the strength of Wi-Fi wireless radio signals |
| A | MHz |
| B | Decibel |
| C | cm |
| D | GHz |
| Answer: B | |
| 24. | The process of conversion of digital data into digital signals is knonw as_____. |
| A | Line coding |
| B | Block coding |
| C | Scrambling |
| D | Multiplexing |
| Answer: A | |
| 25. | The data rate is also called __________. |
| A | baud rate |
| B | modulation rate |
| C | pulse rate |
| D | bit rate |
| Answer: D | |
| 26. | The signal rate (s) is / are also known as __________. |
| A | baud rate |
| B | modulation rate |
| C | pulse rate |
| D | all of the above |
| Answer: D | |
| 27. | ______ is a form of digital encoding in which data bits are represented by transitions from one logical state to the other. |
| A | Manchester encoding |
| B | biphase encoding |
| C | NRZ-L encoding |
| D | nyquist bit rate |
| Answer: A | |
| 28. | Which network topology uses the central hub? |
| A | Bus |
| B | Ring |
| C | Star |
| D | Mesh |
| Answer: C | |
| 29. | _____ states that an analog signal waveform may be uniquely reconstructed, without error, from samples taken at equal time intervals. |
| A | Manchester theorem |
| B | Nyquist’s theorem |
| C | Amplifier |
| D | None |
| Answer: B | |
| 30. | _____ transmission is a data transfer method in which a continuous stream of data signals is accompanied by timing signals. |
| A | Synchronous |
| B | Asynchronous |
| C | Isochronous |
| D | Serial transmission |
| Answer: A | |
| 31. | In which OSI layer the byte synchronization take place? |
| A | Physical layer |
| B | Network layer |
| C | Data link layer |
| D | Transport layer |
| Answer: C | |
| 32. | ______ signal is a signal in which the time interval separating any two significant instants is equal to the unit interval or a multiple of the unit interval. |
| A | Asynchronous |
| B | Manchester encoding |
| C | Synchronous |
| D | Isochronous |
| Answer: D | |
| 33. | __________ is a set of technique which allows the simultaneous transmission of multiple signals across the single data link. |
| A | Multiplexing |
| B | Synchronization |
| C | Spreading |
| D | Pulse stuffing |
| Answer: A | |
| 34. | ______ is an analog multiplexing technique which is used to combine an analog signal for the communication. |
| A | FDM |
| B | TDM |
| C | WDM |
| D | None |
| Answer: A | |
| 35. | What is an analog multiplexing technique used to combine an optical signal? |
| A | WDM |
| B | TDM |
| C | FDM |
| D | ASK |
| Answer: A | |
| 36. | _____ is a digital multiplexing technique for combining several low rate channels into one high rate channels. |
| A | FDM |
| B | TDM |
| C | DWDM |
| D | WDM |
| Answer: B | |
| 37. | What is name of the band which is ranging in between 1 and 300GHz? |
| A | VLF |
| B | Radio waves |
| C | Micro waves |
| D | LF |
| Answer: C | |
| 38. | In __________ switching technique, the resources remain dedicated to the entire duration of the data transmission until the tear-down phase occurs. |
| A | circuit |
| B | packet |
| C | message |
| D | virtual circuit |
| Answer: A | |
| 39. | in which layer the datagram switching technique is used for the transmission. |
| A | Data link layer |
| B | Network layer |
| C | Transport layer |
| D | Session layer |
| Answer: B | |
| 40. | _____ means that two or more bits in the data unit have changed from 0 to 1 or vice-versa. |
| A | Single bit error |
| B | Forword error |
| C | Burst error |
| D | Convolution |
| Answer: C | |
| 41. | ______ means that only one bit of given data unit (such as a byte, character, or data unit) is changed from 1 to 0 or from 0 to 1. |
| A | Single-bit error |
| B | Burst error |
| C | CRC error |
| D | None |
| Answer: A | |
| 42. | ____ is a bit-oriented protocol of communication which uses over a point to point and multipoint link communication. |
| A | HDLC |
| B | TCP |
| C | IP |
| D | SOAP |
| Answer: A | |
| 43. | Which frame is used to store the transport control information? |
| A | I-frame |
| B | U-frame |
| C | S-frame |
| D | Piggybacking |
| Answer: C | |
| 44. | _____ is a group of communication protocols of the data link layer for transmitting data between network points or nodes. |
| A | User Datagram Protocol (UDP) |
| B | Transmission Control Protocol(TCP) |
| C | High-level Data Link Control (HDLC) |
| D | Simple Object Access Protocol (SOAP) |
| Answer: C | |
| 45. | Which frame is used to transport the user data and control information releted to the user data? |
| A | I-frame |
| B | U-frame |
| C | S-frame |
| D | D-frame |
| Answer: A | |
| 46. | _____ protocol is used to define the format of the frame which is used to exchange between the devices. |
| A | HDLC |
| B | Point to point |
| C | Multipoint |
| D | TCP |
| Answer: B | |
| 47. | Which protocol is responsible for establishing, maintaining, configuring, and terminating the links? |
| A | Point to point |
| B | Link control |
| C | TCP |
| D | HDLC |
| Answer: B | |
| 48. | _____ is a messaging protocol specification for exchanging structured information in the implementation of web services in computer networks. |
| A | TCP |
| B | IP |
| C | UDP |
| D | SOAP |
| Answer: D | |
| 49. | It allows several users to share the same frequency channel by dividing the signal into different time slot, is called _______. |
| A | Code Division Multiple Access(CDMA) |
| B | Time-division multiple access (TDMA) |
| C | Frequency Division Multiple Access (FDMA) |
| D | Carrier Sense Multiple Access (CSMA) |
| Answer: B | |
| 50. | ____ is that the station should be able to receive while transmitting to detect a collision from different stations. |
| A | Carrier Sense Multiple Access with Collision Avoidance (CSMA/CA) |
| B | Code Division Multiple Access(CDMA) |
| C | Time-division multiple access (TDMA) |
| D | Frequency Division Multiple Access (FDMA) |
| Answer: A | |
| 51. | In IEEE project 802, The flow control error and parts of the framing duties are combined into the one sub-layer called __________. |
| A | Media Access Control (MAC) |
| B | Physical layer |
| C | Logical Link Control (LLC) |
| D | Source service access point (SSAP) |
| Answer: C | |
| 52. | ______ is a device that creates a wireless local area networt. |
| A | Access Point (AP) |
| B | Basic Service Set (BSS) |
| C | Extended Service Set (ESS) |
| D | None of these |
| Answer: A | |
| 53. | Piconets can be combined to form __________. |
| A | Piconet |
| B | Scatternet |
| C | Bluetooth |
| D | LAN |
| Answer: B | |
| 54. | In __________ the repeater is a used for establishing the network communication. |
| A | Network layer |
| B | Physical layer |
| C | Data link layer |
| D | Transport layer |
| Answer: B | |
| 55. | A bridge operates in __________ and __________ OSI model. |
| A | Physical layer |
| B | Data link layer |
| C | A and B |
| D | None of these |
| Answer: C | |
| 56. | What is used to connect the devices between two internetworks which are based on different models? |
| A | Bridge |
| B | HUB |
| C | Repeater |
| D | Gateway |
| Answer: D | |
| 57. | ______ is a reference model for how applications communicate over a network |
| A | WiFi(Wireless Fidelity) |
| B | OSI (Open Systems Interconnection) |
| C | WWW(World Wide Web) |
| D | IEEE(Institute of Electrical and Electronics Engineers) |
| Answer: B | |
| 58. | ________ network is configured by the software not by the physical wiring. |
| A | LAN |
| B | MAN |
| C | Internet |
| D | Virtual LAN |
| Answer: D | |
| 59. | IPv4 address is __________ bit long. |
| A | 32 bit |
| B | 16 bit |
| C | 128 bit |
| D | 64 bit |
| Answer: A | |
| 60. | Which class of IP addresses are used for the unicast communication? |
| A | A- class |
| B | B-class |
| C | C- class |
| D | All of the above |
| Answer: D | |
| 61. | Which class of IP addresses are use for the multicast communication? |
| A | A-class |
| B | C-class |
| C | D-class |
| D | E-class |
| Answer: C | |
| 62. | What is the length of IPv6 protocol? |
| A | 32 bit |
| B | 64 bit |
| C | 128 bit |
| D | 127 bit |
| Answer: C | |
| 63. | _______ occurs when an IP datagram traverses a network which has a maximum transmission unit (MTU) that is smaller than the size of the datagram |
| A | Fragmentation |
| B | Segmentation |
| C | Framing |
| D | Stuffing |
| Answer: A | |
| 64. | _____ is an obsolete computer networking protocol used by a client computer to request its Internet Protocol (IPv4) address from a computer network, when all it has available is its link-layer or hardware address, such as a MAC address. |
| A | Reverse Address Resolution Protocol (RARP) |
| B | Bootstrap Protocol(BooTP) |
| C | Logical Link Control (LLC) |
| D | High-level Data Link Control (HDLC) |
| Answer: A | |
| 65. | The ______ is a computer networking protocol used in Internet Protocol networks to automatically assign an IP address to network devices from a configuration server |
| A | High-bandwidth Digital Content Protection (HDCP) |
| B | High-level Data Link Control (HDLC) |
| C | Bootstrap Protocol (BOOTP) |
| D | Hypertext Transmission Protocol(HTTP) |
| Answer: C | |
| 66. | ____ is a protocol for assigning dynamic IP addresses to devices on a network. |
| A | Dynamic Host Configuration Protocol (DHCP) |
| B | High-bandwidth Digital Content Protection (HDCP) |
| C | High-level Data Link Control (HDLC) |
| D | Internet Control Message Protocol(ICMP) |
| Answer: A | |
| 67. | ______ is an error-reporting protocol network devices like routers use to generate error messages to the source IP address when network problems prevent delivery of IP packets |
| A | High-level Data Link Control (HDLC) |
| B | Dynamic Host Configuration Protocol (DHCP) |
| C | High-bandwidth Digital Content Protection (HDCP) |
| D | Internet Control Message Protocol (ICMP) |
| Answer: D | |
| 68. | The ______ is a communications protocol used by hosts and adjacent routers on IPv4 networks to establish multicast group memberships. |
| A | High-level Data Link Control (HDLC) |
| B | Dynamic Host Configuration Protocol (DHCP) |
| C | Internet Group Management Protocol (IGMP) |
| D | Internet Control Message Protocol(ICMP) |
| Answer: C | |
| 69. | What is a length of the MAC address? |
| A | 25 bit |
| B | 32 bit |
| C | 48 bit |
| D | 64 bit |
| Answer: C | |
| 70. | The term ______ refers to the fact that the protocol manipulates vectors (arrays) of distances to other nodes in the network. |
| A | Distance vector |
| B | Dynamic routing |
| C | Inter domain routing |
| D | RIP (Routing Information Protocol) |
| Answer: A | |
| 71. | _____ is used to detect an error in the user datagram. |
| A | Port number |
| B | Packet length |
| C | Checksum |
| D | none |
| Answer: C | |
| 72. | ______ is a message oriented protocol which combine the feature of UDP and TCP protocol? |
| A | Stream Control Transmission Protocol (SCTP) |
| B | Transmission Control Protocol (TCP) |
| C | Internet Protocol (IP) |
| D | High-level Data Link Control (HDLC) |
| Answer: A | |
| 73. | ____ is used to inform the congestion problem to the other nodes. |
| A | Choke packet |
| B | Burst packet |
| C | ACK packet |
| D | none |
| Answer: A | |
| 74. | _______ is used to implement the traffic policing and traffic shaping in Ethernet and cellular data networks |
| A | Token bucket |
| B | Leaky bucket |
| C | Choke packet |
| D | Distance Vector |
| Answer: B | |
| 75. | ____ maintain a directory of domain names and translate them to Internet Protocol (IP) addresses. |
| A | Domain Name Servers (DNS) |
| B | Dynamic Host Configuration Protocol (DHCP) |
| C | Internet Group Management Protocol (IGMP) |
| D | None of the above |
| Answer: A | |
| 76. | MIME stands for |
| A | Multiprocess Internet Mail Extension |
| B | Multipurpose Intranet Mail Extension |
| C | Multipurpose Internet Mail Extension |
| D | Multipurpose Internet Main Execution |
| Answer: C | |
| 77. | ______is an extension to the Internet email protocol that allows it’s users to exchange different kinds of data files over the Internet such as images, audio, and video. |
| A | MIME |
| B | FTP |
| C | TCP |
| D | SMTP |
| Answer: A | |
| 78. | _______ protocol is used for sending e-mail messages between servers. |
| A | POP3 |
| B | SMTP |
| C | FTP |
| D | IMAP4 |
| Answer: B | |
| 79. | __________ and __________are used for pulling a messages from the mail server. |
| A | POP3, FTP |
| B | TCP, IP |
| C | POP3, IMAP4 |
| D | SMTP, POP3 |
| Answer: C | |
| 80. | _____ is a client/server application which allows a user to access the remote terminal by using the login procedure? |
| A | TELNET |
| B | ping |
| C | NVT |
| D | NET |
| Answer: A | |
| 81. | MTA stands for |
| A | Mail Translate Agent |
| B | Main Transfer Area |
| C | Mail Translate Area |
| D | Mail Transfer Agent |
| Answer: D | |
| 82. | Each __________ consist of three parts such as controller, client protocol and interpreters. |
| A | server |
| B | browser |
| C | terminal |
| D | web |
| Answer: B | |
| 83. | _____ is a default port for HTTP protocol. |
| A | 25 |
| B | 20 |
| C | 80 |
| D | 128 |
| Answer: C | |
| 84. | What is the error no of “The document not found” message? |
| A | 401 |
| B | 402 |
| C | 403 |
| D | 404 |
| Answer: D | |
| 85. | SNMP stand for |
| A | Simple Network Management Protocol |
| B | Simple Network Manager Protocol |
| C | Simple Network Management Project |
| D | Simple Networking Management Protocol |
| Answer: A | |
| 86. | Dynamic documents are also known as __________ document. |
| A | Server-site |
| B | Client- site |
| C | Proxy-site |
| D | Localhost |
| Answer: A | |
| 87. | www project was initiated by __________. |
| A | Bell lab |
| B | ANSI (American Nation Standards Institute) |
| C | CERN (European Organization for Nuclear Research) |
| D | none |
| Answer: C | |
| 88. | What is the default mode of the FTP? |
| A | Block mode |
| B | Compressed |
| C | Stream mode |
| D | none |
| Answer: C | |
| 89. | Which is the standard mechanism provided by TCP/IP for coping a file from one host to another? |
| A | FTP |
| B | HTTP |
| C | SMTP |
| D | POP3 |
| Answer: A | |
| 90. | Converting analog signals to digital signals is called __________. |
| A | modulation |
| B | demodulation |
| C | multiplexer |
| D | none |
| Answer: B | |
| 91. | Which device is used for modulation and demodulation process? |
| A | Hub |
| B | Modem |
| C | Gateway |
| D | Bridge |
| Answer: B | |
| 92. | Which OSI model layer is used to perform a routing? |
| A | Data link layer |
| B | Transport layer |
| C | Network layer |
| D | Physical layer |
| Answer: C | |
| 93. | In which network topology, the bi-directional link is established between the each possible node? |
| A | Hybrid |
| B | Ring |
| C | Star |
| D | Mesh |
| Answer: D | |
| 94. | Communication in the computer devices are called as __________ communication. |
| A | serial |
| B | direct |
| C | parallel |
| D | full duplex |
| Answer: A | |
| 95. | Which device is used to combines the transmission from several I/O devices into single line? |
| A | Modifier |
| B | Repeater |
| C | Multiplexer |
| D | Router |
| Answer: C | |
| 96. | How many pairs of station can simultaneously communicate in ethernet LAN? |
| A | Two |
| B | One |
| C | Four |
| D | Many |
| Answer: B |
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