In this post you will find answers of Upwork Networking Concepts Test, Please press CTRL + F to find your desired answers of test
1. Which of the following ranges are reserved as private addresses?
Answers: • 10.0.0.0 - 10.255.255.255 or • 172.16.0.0 - 172.31.255.255
2. What is a checksum?
Answers: • An error detection technique
3. What is multiplexing?
Answers: • Allowing multiple senders and receivers to share a single media
4. According to the OSI model, at which layer are network addresses assigned?
Answers: • Network
5. According to the OSI model, which layer addresses the issue of network topologies (star, ring, bus etc)?
Answers: • Physical
6. What is the IEEE 802.3 standard related to?
Answers: • Ethernet
7. What is the maximum transmission speed of CAT 5 cable?
Answers: • 100 Mbps
8. Which of the following is an 'end-to-end' layer?
Answers: • Transport
9. What is attenuation?
Answers: • Weakening of the signal in a cable over a distance
10. Old mainframe computers were an example of ______?
Answers: • Centralized computing
11. At which layer of the OSI model, does HTTP operate?
Answers: • Application
12. Which of the following is a disadvantage of Client Server networks?
Answers: • They require high investment in the form of purchase of a server
13. Which cable used for RJ11 connectors?
Answers: • Telephone Cable
14. What is the speed of a E1 line?
Answers: • 2.048 Mbps
15. How many bits of the MAC address are used by OUI portion?
Answers: • 24 bits
16. What do you call a communication system in which data can be sent in both directions at the same time?
Answers: • Full Duplex
17. At which layer of the OSI model, does a World Wide Web browser operate?
Answers: • Application
18. Which of the following services is feasible using standard ISDN?
Answers: • All of the above
19. What is ATM (Asynchronous Transfer Mode)?
Answers: • It is a WAN technology based on time division multiplexing that uses fixed size packets known as cells
20. What is the maximum speed supported by a standard ISDN BRI?
Answers: • 128 kbps
21. Which media access technique does Ethernet use?
Answers: • CSMA/CD
22. What are PPP and SLIP most commonly used for?
Answers: • Connecting to the Internet through telephone lines
23. How is a unique MAC address assigned to a Network Card?
Answers: • It is built into the card when the card is manufactured
24. According to the OSI model, which layer performs compression and decompression?
Answers: • Presentation
25. What is the full form of PPPoE?
Answers: • Point to Point Protocol over Ethernet
26. In a TCP/IP network, which of the following must be unique for each computer in the network?
Answers: • IP address
27. For which layer of the OSI model has the Ethernet standard been defined?
Answers: • Both a and b
28. In a TCP/IP network, which layers are basically absent?
Answers: • Session, Presentation
29. What is the maximum number of valid IP addresses in a class B network?
Answers: • 65536
30. According to the OSI model, which layer performs parity checking and error checking?
Answers: • Data Link
31. What is the IEEE 802.5 standard related to?
Answers: • Token Ring
32. According to the OSI model, which layer performs encryption and decryption?
Answers: • Presentation
33. What do you call a fibre optic cable in which the light signals follow a single path?
Answers: • Baseband
34. Which of the following protocols does not support Routing?
Answers: • NetBEUI
35. What is the full form of DSL?
Answers: • Digital Subscriber Line
36. Which type of network uses dual fibre-optic rings?
Answers: • FDDI
37. Which protocol uses port number 23?
Answers: • Telnet
38. At which layer does a Bridge operate?
Answers: • Data Link
39. What do you call a fibre optic cable in which the light signals follow multiple paths?
Answers: • Broadband
40. According to the OSI model, which layer performs the function of transforming bits of data into electrical signals and sending those signals across the media?
Answers: • Physical
41. What do you call a communication system which uses start and stop bits to synchronize the sender and receiver?
Answers: • Asynchronous
42. Which of the following is mentioned in the correct sequence (from lowest layer to highest)?
Answers: • Physical, Data Link, Network, Transport, Session, Presentation, Application
43. Which cabling media does not suffer from Electro-Magnetic Interference(EMI)?
Answers: • Fibre Optic Cable
44. What do you call a communication system which uses a clocking mechanism to synchronize the sender and receiver?
Answers: • Synchronous
45. What is the binary value of hex BF?
Answers: • 10111111
46. Which layer of the OSI model corresponds to IP?
Answers: • Network
47. How many bearer (B) and data (D) channels are there in a standard ISDN BRI service?
Answers: • 2B + 1D channel
48. According to the OSI model, which layer is responsible for routing?
Answers: • Network
49. At which layer of the OSI model, does FTP operate?
Answers: • Application
50. What is the purpose of twisting the pairs of cables together in a UTP cable?
Answers: • To reduce cross talk
51. What is the IEEE 802.2 standard related to?
Answers: • Definition of the Logical Link Control (LLC) sublayer
52. Which layer is broken down into the MAC and LLC sublayers?
Answers: • Data Link
53. According to the OSI model, which layer addresses the issues of communication media and cable connectors etc?
Answers: • Physical
54. At which layer of the OSI model, does SMTP (Simple Mail Transfer Protocol) operate?
Answers: • Application
55. What do you call a medium which only allows a single channel?
Answers: • Baseband
56. Which layer of the OSI model corresponds to TCP?
Answers: • Transport
57. What is the X.25 protocol?
Answers: • It is a packet switching WAN protocol based on public telephone networks
58. What is the purpose of the shielding in a Shielded Twisted Pair (STP) cable?
Answers: • To reduce Electro-Magnetic Interference
59. What does CSMA/CA stand for?
Answers: • Carrier Sense Multiple Access/ Collision Avoidance
60. What is the recommended maximum length(approx) for a segment of UTP cable?
Answers: • 100m
61. Which of the following is a Fiber Optic Connector?
Answers: • MT-RJ
62. Which network topology does FDDI use?
Answers: • Ring
63. Which of the following is a disadvantage of Peer Networks?
Answers: • They have poor network security
64. According to the OSI model, which layer is responsible for sending acknowledgements?
Answers: • Transport
65. At which layer of the OSI model, does a Proxy Server operate?
Answers: • Application
66. Which of the following is used as a high speed network backbone media?
Answers: • Fibre Optic Cable
67. According to the OSI model, which layer provides services such as file transfer, database access and email?
Answers: • Application
68. Which of the following is false with regard to assymetric DSL?
Answers: • It employs analog modulation to deliver data from your PC to the telephone service provider
69. What is the binary value of hex 9F?
Answers: • 10011111
70. What does CSMA/CD stand for?
Answers: • Carrier Sense Multiple Access/ Collision Detection
71. Which media suffers least from attenuation?
Answers: • Fibre Optic Cable
72. At which layer does a Hub operate?
Answers: • Physical
73. According to the OSI model, which layer addresses the issue of connections (connection-oriented/ connection-less communication)?
Answers: • Network
74. What is the speed of a T1 line?
Answers: • 1.544 Mbps
75. What do you call a medium which allows multiple channels?
Answers: • Broadband
76. Which protocol is connection oriented?
Answers: • TCP
77. Which of the following is a Class A network?
Answers: • 126.0.0.0
78. Which cable uses RJ45 connectors?
Answers: • Shielded Twisted Pair Cable
79. At which layer does a Router operate?
Answers: • Network
80. What is a token?
Answers: • A special packet which travels from computer to computer in a token ring network
81. What are V.42, V.22, V.42bis?
Answers: • CCITT standards
82. According to the OSI model, which layer breaks down the data into frames?
Answers: • Data Link
83. Which network topology does Ethernet use?
Answers: • Mesh
84. What is the speed of ISDN PRI service with 30B + 1D channel?
Answers: • 2.048 Mbps
85. Which type of connector is mostly used these days for connectivity with the network card?
Answers: • RJ-45
86. What is the purpose of the MAC sublayer?
Answers: • Controlliing the way multiple devices share the same media
87. Which of the following cables can be used to connect a PC and a Hub?
Answers: • Straight cable
88. What is the binary value of 157?
Answers: • 10011101
89. Which one of the following devices breaks up a Broadcast Domain by default?
Answers: • Router
90. What do you call a communication system in which data cannot be sent in both directions at the same time?
Answers: • Half Duplex
91. What does ISDN stand for?
Answers: • Integrated Services Digital Network
92. How many twisted pairs does a UTP Cat 5 cable have?
Answers: • 8
93. According to the OSI model, which layer addresses the issue of switching (packet switching, message switching etc)?
Answers: • Data Link