Computer Network (CS610)

1. In 3-way handshake TCP requires to generate a random ________ sequence number.

   1. 30 bit
   2. 32 bit
   3. 34 bit
   4. none of the given

2. In a ping command result, time denotes the ________.

   1. TLT
   2. BRT
   3. TTL
   4. RTT

3. Which of the following is called virtual channel?

   1. Connection in VCI
   2. Connection in ATM
   3. Connection in virtual circuit
   4. None of the above

4. Even parity can be used to check for ________ bit/bits of errors.

   1. 1
   2. 2
   3. 3
   4. 0

5. According to a bridge performance, if both the source and destination are on the same segment.

   1. It forwards the frame to the other segment
   2. It does not forward the frame to the other segment
   3. It does not forward the frame to the same segment
   4. It forwards the frame to every other segment

6. ________ protocol uses three way handshake to begin a connection.

   1. UDP
   2. TCP
   3. IP
   4. none of the given

7. ________ is a tool that sends a message to a remote computer and reports whether the computer responds.

   1. Ping
   2. Flag
   3. Fragment offset
   4. TCP

8. Hashing is the transformation of a string of characters into a usually shorter fixed-length value or a key that represents the original string.

   1. true
   2. false

9. In ________ topology, if the switch goes down all the computers will be disconnected.

   1. Bus
   2. Ring
   3. Mesh
   4. Star

10. Point-to-point topology is

    1. Size Based
    2. Mobility Based
    3. Connectivity Based
    4. Medium Based

11. The ________ field of Ethernet frame has the purpose of receiver synchronization.

    1. Preamble
    2. Frame Type
    3. Data
    4. CRC

12. LAN interface uses ________ to copy frame data directly from main memory.

    1. DMA
    2. FDDI
    3. Hard disk
    4. Flash

13. The network occupies larger areas like cities & countries is called

    1. LAN
    2. WAN
    3. MAN
    4. All of the above

14. How many methods exist for computing routing table?

    1. 5
    2. 4
    3. 3
    4. 2

15. The information about ________ is kept in routing tables.

    1. Entries
    2. Destinations
    3. Source
    4. Packets

16. Frame relay is ________.

    1. Connection oriented service
    2. Connectionless service
    3. It is typically ranges from 5Mbps to 1000Mbps
    4. None of the given

17. SMDS is ________.

    1. Connectionless service
    2. Connection oriented service
    3. Used for delivering blocks of data
    4. None of the given

18. Twice NAT fails if an application uses the IP addresses instead of Domain Name.

    1. true
    2. false

19. The Ethernet standard specifies that frames are sent using the ________ scheme.

    1. Differential Manchester
    2. Not Return to Zero (NRZ)
    3. Return to Zero (RZ)
    4. Manchester Encodind

20. The recent executed instruction ________ in temporal aspect of the locality of reference.

    1. won't be executed soon
    2. is temporarily not referenced
    3. will be wxwcuted soon again
    4. will be showing the final results

21. The maximum cable length of a LAN is ________.

    1. Fixed
    2. Unlimited
    3. Fixed and Unlimited in different conditions
    4. None of these

22. The protocol address of the next hop must be _____________ to an equivalent hardware address before a packet can be sent.

    1. Encrypted
    2. Decrypted
    3. Translated
    4. Non of these

23. Missing ________ in a frame format indicates receiving computer missed beginning of the message.

    1. soh
    2. eoh
    3. eot
    4. sot

24. ________ places the boundary between the second and third octets

    1. Class A
    2. Class B
    3. Class C
    4. Class D

25. Hardware that calculates a CRC uses two simple components ________.

    1. Shift register and XOR unit
    2. ANd unit and XOR unit
    3. Shift register and shift XOR unit
    4. Shift register & AND unit

26. Which type of network consists of wired computers in a university classroom?

    1. WAN
    2. LAN
    3. MAN
    4. PAN

27. Fragmentation when using ICMP for path MTU should be avoided.

    1. true
    2. false

28. In ________ all computers are attached to a central hub.

    1. Star Topology
    2. Bus Topology
    3. Hub Topology
    4. Ring Topology

29. Bluetooth uses shared medium and ________ instead of coaxial cable.

    1. Radio waves
    2. Low frequency waves
    3. Micro waves
    4. Infrared waves

30. The switch that has computers attached with it is called ________ switch.

    1. Exterior
    2. Interior
    3. Packet
    4. Front

31. Which multiplexing technique transmits analog signals?

    1. FDM
    2. TDM
    3. WDM
    4. Both (a) and (c)

32. The physical addressing in a WAN is similar as in LAN in the way __________.

    1. The data is transmitted in packets equivalent to frames.
    2. Each packet has a format with header.
    3. The packet header includes destination and source addresses.
    4. All of the above

33. An interior switch is one with wich ________.

    1. Computers are attached.
    2. No computer is attached.
    3. Computers are attached internally.
    4. None of the above.

34. The first automated tool required to see whether the given computer is online or not was

    1. Probing program
    2. PING program
    3. status program
    4. None of the above

35. ATM header is about ________ of the cell.

    1. 100 %
    2. 10 %
    3. 20 %
    4. 50 %

36. Which multiplexing technique shifts each signal to a different carrier frequency?

    1. TDM
    2. FDM
    3. Both a and b
    4. None of the above

37. NIC connection in a physical network is known as __________.

    1. LAN wiring scheme
    2. WAN wiring scheme
    3. Color wiring scheme
    4. None of above

38. What will be the bandwidth rate for older, low-speed network, and analog telephones?

    1. 16 MHz
    2. 20 MHz
    3. 24 MHz
    4. 30 MHz

39. ________ are more frequently being designed to allow specification of the quality of service required by users.

    1. Switch
    2. VPI
    3. VCI
    4. Networks

40. Two computers with a connection through an ATM network will likely have same VPI/VCI values for each end of the connection.

    1. true
    2. false

41. In FDDI, in case of a station failure, remaining stations loop back and ________.

    1. Re-route data through spare ring
    2. Data frames are discarded
    3. Re-transmit data through the same ring
    4. Collision will occur

42. Which of the following is not a guided medium?

    1. Twisted-pair cable
    2. Fiber-optic cable
    3. Atmosphere
    4. Coaxial cable

43. If a small set of bits changes near a specific location due to lighting or electric motor starting nearby, this type of errors are called ________.

    1. Burst error
    2. Vertical error
    3. Parity Error
    4. Single bit error

44. According to size, there are ________ classifications of networks.

    1. 2
    2. 3
    3. 4
    4. 5

45. ________ cannot be extended arbitrarily far or to handle arbitrarily many computers.

    1. WAN
    2. LAN
    3. MAN
    4. LED

46. ________ is a measure of the rate at which data can be sent through the network.

    1. Throughput
    2. Propagation delay
    3. Access delay
    4. Switching delay

47. In CSMA, if simultaneous transmission occurs, the ________ interfere with each other and this phenomenon is called collision.

    1. Computers
    2. Network
    3. Frames
    4. Cable wires

48. Which of the following is not a benefit of Source Independence?

    1. It allows fast and efficient routing.
    2. Packet switch need not hove complete information about all destinations.
    3. network functions even if topology changes.
    4. None of the given

49. EGPs stand for ________.

    1. Exterior Gateway Protocols
    2. External Gateway Protocols
    3. Extra Gateway Protocols
    4. None of the given

50. Due to revolutionalization of IP-V6 the speed has increased from ________.

    1. 56kbps to 512kbps
    2. 512kbps to 1gbps
    3. 56kbps to 1gbps
    4. none of the given

51. The third field of the header consists of ___________ bit Ethernet frame type.

    1. 48
    2. 32
    3. 16
    4. 8

52. Which of the following statement is true regarding ATM?

    1. It is a single technology for voice, video and data.
    2. It has low jitter and high capacity.
    3. It uses fixed size, small cells, 48 octet’s data.
    4. All of the above

53. As a result of ARPA research, the first network was established which was named as ________.

    1. ARPANET
    2. PACKET NETWORK
    3. ARPNET
    4. INTERNETWORKING

54. ATM offers high speed and ________ delay.

    1. High
    2. Low
    3. Moderate
    4. All of the above

55. Which layer of the OSI Model directly communicates and controls the transmission medium:

    1. Transmission
    2. Physical
    3. Application
    4. Network

56. We need packets rather than bits because ________.

    1. To compress the data
    2. Packets move faster
    3. Sender and receiver need to coordinate to detect transmission errors.
    4. Packets can only move between two terminals

57. Thick Ethernet also requires ________ to avoid signal reflectance.

    1. Terminators
    2. Drop cable
    3. Transceivers
    4. AUI cable

58. The topology each computer is connected to a central hub is called

    1. Ring topology
    2. Star topology
    3. Tree topology
    4. Mesh topology

59. When an application _________ data, it makes a copy of the data available to all other computers on the network.

    1. Broadcasting
    2. Multicasting
    3. Unicasting
    4. None of the given

60. ________ encapsulates IP datagram as data area in hardware frame.

    1. Network Interface Layer
    2. Datalink Layer
    3. Network Layer
    4. None of the given

61. The length of time required to send a variable length packet is ________.

    1. 5 seconds
    2. Variable
    3. Constant
    4. Fix

62. ________ is standard wireless LAN that uses radio signals at 2.4HHz.

    1. IEEE 803.16
    2. IEEE 802.3
    3. IEEE 802.15
    4. IEEE 802.11

63. Which of the following is a benefit of source independence?

    1. It allows fast and efficient routing.
    2. Packet switch do not need to have complete information about all destinations
    3. Network functions even if topology changes
    4. All of the above

64. Which of the following cannot be used to extend a LAN?

    1. Repeaters
    2. Switches
    3. Routers
    4. Fiber Modems

65. NAT device stores state information in translation table.

    1. true
    2. false

66. Which of the following remains same in the header of the packet in a datagram during the entire journey of the packet?

    1. Source Address
    2. Destination Address
    3. Next Node Address
    4. Checksum

67. SMDS is ________.

    1. Connectionless service
    2. Connection oriented service
    3. Used for delivering blocks of data
    4. None of the given

68. ________ Source is responsible for fragmentation.

    1. IPV4
    2. IPV6

69. ________ sends ICMP echo messages with increasing TTL.

    1. Ping
    2. Trace route
    3. Tracert
    4. none of the given

70. Which of the following technologies can extend the diameter of LAN medium?

    1. Fiber optic
    2. Repeaters
    3. Diameter of LAN medium is not extendable
    4. Both Fiber Optic and Repeaters

71. To span long distances or many computers, networks must replace shared medium with _________.

    1. segment transformation
    2. fiber optices
    3. packet switches
    4. None of the above

72. The sharing of a ________ among the workers in an office is a goal of resource sharing.

    1. Mouse
    2. Printer
    3. Keyboard
    4. Motherboard

73. The number of connections needed for 8 computers in direct point to point communication is equal to ________.

    1. 28
    2. 8
    3. 7
    4. 26

74. Header contains all information needed to deliver datagram to the destination computer. But which one of the following is not included:

    1. Destination address
    2. Source address
    3. Rectifier
    4. Other delivery information

75. The frame format of any LAN technology must consists of ________ and ________.

    1. Payload and CRC
    2. Payload and Frame type
    3. Frame header and pay load
    4. Frame header and CRC

76. ________ is less complex and easy to understand.

    1. TCP
    2. UDP
    3. IP
    4. None of the given

77. The Fast Ethernet hardware operates at a rate of ________.

    1. 10 Mbps
    2. 1000 Mbps
    3. 1000 bps
    4. 100 Mbps

78. ________ is the most popular wiring scheme because of lowest cost.

    1. 5 Base T
    2. 10 Base T
    3. 100 Base T
    4. 1000 Base T

79. The ________ of errors is easier than the ________ of errors.

    1. correction, detection
    2. detection, correction
    3. correction, creation
    4. detection, manipulation

80. IPV6 128 bits address includes network prefix and ________

    1. Host Suffix
    2. Host prefix
    3. Source Prefix
    4. none of the given

81. The mechanism extending the optical fiber across several kilometers is very successful because delays on optical fiber are very _______ and bandwidth is very _______.

    1. Low, High
    2. High, Low
    3. High, High
    4. Low, Low

82. Frames include additional information to detect/correct errors are insert by ________.

    1. Sender
    2. Receiver
    3. Network Devices
    4. Sender and Receiver

83. ________ and ________ are the two types of frame type.

    1. Internal and external
    2. Single and dual
    3. Implicit and explicit
    4. Multicast and broadcast

84. If a sender with a 1 Gigabit NIC and receiver with 100 Megabit NIC wants to communicate with each other at which speed they can communicate?

    1. 11 Megabit
    2. 100 Megabit
    3. 1 Gigabit
    4. 1.1 Gigabit

85. Each computer in LAN is identified by a physical address, usually imprinted on the ________.

    1. Router
    2. Switch
    3. Network Interface Card
    4. Modem

86. If simultaneous transmission occurs, the frames interfere with each other and this phenomenon is called ________.

    1. collision
    2. delayed transmission
    3. packet loss
    4. coordination

87. Dotted decimal notation is a syntactic form the IP software uses to express ________ binary values when interacting with humans.

    1. 8-bit
    2. 16-bit
    3. 32-bit
    4. 64-bit

88. In Direct point to point communication adding the Nth computer requires ________ new connections.

    1. (N^2 - N)/2
    2. N^2
    3. N(N - 1)
    4. N - 1

89. A ________ is a special-purpose computer dedicated to the task of interconnecting networks.

    1. Router
    2. Bridge
    3. Switch
    4. None of the given

90. VBR stands for __________.

    1. Virtual Bit Rate
    2. Virtual Byte Rate
    3. Variable Byte Redundancy
    4. Variable Bit Rate

91. The bridges communicate with each other on the network and use ________ algorithm to decide which bridge will not forward frames if a cycle occurs.

    1. Djikstra
    2. Shortest path first
    3. Vector distance
    4. Distributed Spanning Tree

92. Physical Addressing is a WAN is similar to LAN as each packet has format with ________.

    1. Header
    2. Title
    3. Frame
    4. Address

93. ________ is inflexible.

    1. Routing
    2. Searching
    3. Processing
    4. Static routing

Select a course code for Objective Questions:

ACC311 ACC501 BIF101 BIF401 BIF501 BIO101 BIO201 BIO202 BIO203 BIO204 BIO301 BIO302 BIO303 BIO401 BIO503 BNK603 BT101 BT201 BT301 BT302 BT401 BT402 BT403 BT404 BT405 BT406 BT501 BT504 BT505 BT604 CHE201 CHE301 CS001 CS101 CS201 CS202 CS204 CS301 CS302 CS304 CS311 CS401 CS402 CS403 CS408 CS501 CS502 CS504 CS506 CS508 CS601 CS602 CS604 CS605 CS607 CS609 CS610 CS614 CS707 CS710 ECO401 ECO402 ECO403 ECO404 EDU302 EDU401 EDU402 EDU501 EDU601 ENG101 ENG201 ENG301 ENG501 FIN611 FIN624 FIN625 ISL201 IT430 MCM101 MCM301 MGMT623 MGT101 MGT211 MGT301 MGT401 MGT402 MGT501 MGT502 MGT503 MGT510 MGT601 MGT603 MKT501 MKT610 MKT630 MTH101 MTH202 MTH302 MTH501 MTH601 MTH634 PAK301 PHY101 PHY301 PSY101 PSY403 PSY502 PSY512 SOC101 SOC301 SOC401 STA301 STA630 STA641 ZOO102 ZOO401 ZOO501 ZOO502 ZOO503 ZOO504 ZOO505 ZOO506 ZOO510 ZOO630

Select a course code for Subjective Questions:

ACC311 CS001 CS101 CS201 CS301 CS607 CS701 CS702 CS703 CS704 CS707 CS708 CS710 CS711 CS718 CS721 CS724 ECO401 ECO403 ENG101 ENG301 MGT703 MTH501 STA301