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Computer Networks
1. A file is being transferred. The time required actually is 6- hours. The mean time between crashes is 2- hours. The time required for the transfer is _ _ _ _ _ _ _ _ hours if synchronization is not provided. a. 12 hours b. 3 hours c. Zero hours **d. Infinite
- The information related to multi-programmed hosts is placed in the header of _ _ _ _ _ _ _ Layer** a. Application layer b. Transport Layer c. Session layer d. Network Layer. 3. The _ _ _ _ _ _ _ _ _ _ Layer is a true end to end layer , from source to destination. a. Network Layer. b. Data Link Layer c. Data Layer **d. Transport Layer
- The operation of subnet is controlled by _ _ _ _ _ _ _ _ a. Network Layer.** b. Data Link Layer c. Data Layer d. Transport Layer 5. Accounting Functions are the responsibility of _ _ _ _ _ _ _ _ _ _ Layer a. Network Layer. b. Data Link Layer c. Data Layer d. Transport Layer 6. Which one of the following is correct?? a. Character - represented by One's Complement b. Character - represented by Two's Complement c. Integer - represented by ASCII **d. Character - represented by Unicode
- Multiplexing and Demultiplexing of Network connections is by _ _ _
Layer** a. Network Layer.
b. Data Layer c. Data Link Layer d. Transport Layer
8. Two sides cannot attempt the same operation at the same time. This property is accomplished by _ _ _ _ _ _ _ _ _ _ Layer a. Session Layer b. Transport Layer c. Physical Layer d. Network Layer 9. The number of layers in the OSI model is _ _ _ _ _ _ _ _ a. 5 b. 4 c. 7 d. 8 10._ _ _ _ _ _ _ Layer contains network virtual terminal a. Application layer b. Session layer c. Presentation layer d. Data Link Layer 11.Presentation Layer is concerned with _ _ _ _ _ _ _ _ _ _ a. Synchronization b. Flow Control c. Syntax and Semantics d. File Transfer. 12.Frame boundaries are recognized and created by _ _ _ _ _ _ _ _ _ Layer. a. Application layer b. Data Link Layer c. Session layer d. Network Layer. 13.Token Management is the function of _ _ _ _ _ _ _ _ _ _ _ _ Layer. a. Application layer b. Data Link Layer c. Session layer d. Network Layer. 14.The function of Physical Layer is _ _ _ _ _ _ _ _ _ _ _ a. Error correction and Detection b. Piggybacking c. Flow Control d. Determine number of volts to represent 1 or 0.
c. star d. primary 22.Which topology requires a central controller or hub? a. mesh b. star c. bus d. ring 23.Which topology requires a multipoint connection? a. mesh b. star c. bus d. ring **24.Communication between a computer and a keyboard involves _ _ _
_ _ _ transmission a. Simplex** b. half-duplex c. full-duplex d. automatic 25.A tree topology is a variation of a _ _ _ _ _ _ _ _ _ topology. a. mesh b. star c. bus d. ring 26.In a _ _ _ _ _ _ _ _ _ _ _ _ topology, if there are n devices in anetwork, each device has n-1 port for cables a. mesh b. star c. bus d. ring 27.A _ _ _ _ _ _ _ _ _ _ _ connection provides a dedicated link between two devices. a. point - to - point b. multipoint c. primary d. Secondary 28.In a _ _ _ _ _ _ _ _ _ _ connection, more than two devices can share a single link. [02S07] a. point - to - point b. multipoint
c. primary d. Secondary 29.In _ _ _ _ _ _ _ _ _ _ _ transmission, the channel capacity is shared by both communicating devices at all times. a. Simplex b. half-duplex c. full-duplex d. automatic 30.Which Protocol is used for electronic mail? a. TELNET b. NNTP c. HTTP **d. SMTP 31.The TCP/IP model has connection less communication in _ _ _ _ _ _
_ Layer** a. Transport Layer b. Internet layer c. Presentation Layer d. Application Layer 32.The functions of internet Layer in TCP/IP are a. Flow Control and Error Control b. Congestion Control and Flow Control c. Packet Routing and Flow Control d. Congestion Control and Packet Routing 33.The protocols used in Host to network layer of TCP/IP model are a. TEL NET and LAN b. ARPA NET and SAT NET c. PACKET RADIO and IP d. LAN and IP 34.HTTP is acronym of a. Hyper Text Transfer Protocol b. Hyper Test Transfer Protocol c. Hyper Text Transport Protocol d. Hyper Text Transport Program 35.The number of layers in TCP/IP model is _ _ _ _ _ _ _ _ _ a. 5 b. 4
a. 4, 12 b. 12, 4 c. 8, 16 d. 16, 8 44.In the earlier ARPA NET each node of network consisted a. TIP & a host b. BBN & a host c. IMP & a host d. SAP & a host 45.Novell Netware is based on _ _ _ _ _ _ _ _ _ _ _ a. XNS b. OSI c. TCP/IP d. TIP 46.The protocols used in Transport layer of Novell Netware _ _ _ _ _ _ _ _ _ a. NCP & SAP b. NCP & IPX c. NCP & SPX d. NCP & TIP 47.IPX in Novell Netware is functionally similar to _ _ _ _ _ _ _ _ _ _ Protocol a. TCP b. IP c. UDP d. SAP 48.The address in Novell Netware contains a. 32- bit Network Number, 48-bit Machine Number & 16-bit Local address b. 16- bit Network Number, 32-bit Machine Number & 48-bit Local address c. 48- bit Network Number, 16-bit Machine Number & 32-bit Local address d. 16- bit Network Number, 48-bit Machine Number & 32-bit Local address 49.The physical layer of Novell Netware consists of _ _ _ _ _ _ _ _ _ _ _ protocol a. IPX b. NCP c. SAP d. ARC NET 50.The connection oriented transport protocol in Novell Netware is _ _ _ _ _
_ _ _ _ _
a. NCP b. IPX c. SAP d. Ethernet 51.IPX is used in _ _ _ _ _ _ _ _ _ _ layer of Novell Netware a. Application b. Transport c. Network d. Physical 52.Expand SAP in Novell Netware a. Service access point b. Special Access Point c. Service access protocol d. Service Advertising Protocol 53.Minicomputers in ARPANET are called a. ARPA Computers b. IMP c. BBN d. DARPA Computers 54.Expand TIP in ARPA NET a. Touch Interest protocol b. Terminal Interface protocol c. Transport International Protocol d. Terminal Interface protocol 55._ _ _ _ _ _ _ _ _ _ was created to organize machines into Domains and map hostnames into IP addresses. a. BBN b. IMP c. TIP d. DNS 56.Internet is based on _ _ _ _ _ _ _ _ _ protocol stack. a. XNS b. IMP c. TCP/IP d. SAP 57.The topology not used in LAN is _ _ _ _ _ _ _ _ _ a. Ring b. Star c. Bus d. Mesh
b. MAN c. WAN d. Broadcast Networks 66._ _ _ _ _ _ Broadcast Networks can be divided into Static and dynamic depending on channel allocation a. MAN b. LAN c. Broadcast Networks d. WAN 67.Local Cable TV Network is an example for _ _ _ _ _ _ _ _ _ _ a. WAN b. Broadcast c. LAN d. MAN 68.The IEEE standard for DQDB is _ _ _ _ _ _ _ a. 802. b. 802. c. 802. d. 802. 69.Hosts in WAN are connected by _ _ _ _ _ _ _ _ _ _ _ _ a. Communication Line b. Subnet c. Router d. Another host Computer 70.Which one is not a transmission line? a. Circuits b. Channels c. Trunks d. Paths 71.Satellite or ground radio is an example for _ _ _ _ _ _ _ a. WAN b. MAN c. LAN d. Broadcast Networks 72.LASERs face a inhibition on a. sunny day b. dry day c. windy day d. rainy day
73._ _ _ _ _ _ _ _ transmission has more suitable for indoor wireless LANs a. radio b. micro wave c. infra red d. light wave 74._ _ _ _ _ _ _ _ _ category twisted pairs are called as unshielded twisted pair a. Category 1 b. Category 3 c. Category 5 d. Category 3 & Category 5 75.Which of the following is not considered an important use of microwaves a. Industrial bands b. scientific bands c. medical bands d. entertainment bands 76.The number of oscillations per second of anelectromagnetic wave is called its _ _ _ _ _ _ _ and is measured in _ _ _ _ _ _ _ _] a. wave length ,mts b. frequency,Hz c. amplitude, mts d. time period, secs 77.The mode of transmission most suitable is _ _ _ _ _ _ _ a. twisted pair b. fibre optics c. wireless d. coax 78.A modern application to connect the LANs in two buildings is through _ _ _ _ _ _ _ _ transmission] a. radio b. micro wave c. infra red d. light wave 79.What is advantage of twists for a wire _ _ _ _ _ _ _] a. Data lose b. Noise reduction c. No noise d. Added noise
b. 3*10 8 cm/sec
c. 3*10 9 m/s
d. 3*10 9 cm/sec
**88.In transparent Bridges, all the decisions are made by looking into
_ _ _ _ _** a. Advertisement Tables b. Description Tables c. Hash Tables d. Fragment Tables **89.If destination LAN is unknown in Transparent Bridges then we use
_ _ _ _ _ _** a. Link State Routing b. Flooding c. Shortest Path Routing d. Flow Based Routing 90.Which among the below of source routing bridges is complex? a. Hardware b. Software c. Hybrid d. Remote 91.Configuration of _ _ _ _ _ _ _ _ _ _ _ _ is manual a. Transparent b. Spanning Tree c. Remote d. Source Routing 92.In LAN with token ring topology, _ _ _ _ _ _ _ _ _ _ _ are used a. Transparent b. Spanning Tree c. Remote d. Source Routing 93.A configuration of N LANs is linearly connected by 4 bridges. By the time we reach the Nth LAN how many discovery frames will be circulating?
a. N 4
b. 4
c. 4 N
d. N
94.Which of the following is not an internetworking device? a. Bridge b. Repeater c. Router d. Cable 95.What type of bridge must have its address table entered manually? a. Simple b. Transparent c. Multi port d. Source routing 96.A bridge has access to the _ _ _ _ _ _ _ _ _ _ _ address of a station on the same network. a. Physical b. Network c. Service access point d. Logical 97.In source routing bridges _ _ _ _ _ _ _ _ _ frame is used to discover the destination a. Discovery b. Control c. Data d. Acknowledgement 98.LAN's can be connected by a device called _ _ _ _ _ _ _ _ _ _ a. Routers b. Modems c. Ethernet card d. Bridges 99.In _ _ _ _ _ _ _ _ all frames are given to the computer, not to those addressed a. Promiscuous mode b. Miscues mode c. Normal mode d. Special Mode 100._ _ _ _ _ _ Algorithm is used in transparent bridges a. Forward Learning b. Backward Learning c. Reverse Backward Learning d. Reverse Forward Learning
109.The PSTN is an example of _ _ _ _ _ _ _ network a. packet-switched b. circuit-switched c. message-switched d. TSI 110.In _ _ _ _ _ _ _ _, each packet of a message follows the same path from sender to receiver a. Circuit switching b. message switching c. a virtual approach to packet switching d. The datagram approach to packet switching 111.In a time division switch, a _ _ _ _ _ _ _ governs the destination of a packet stored in RAM a. TDM bus b. cross bar c. cross point d. control unit 112.How many cross points are needed in a single stage switch with 40 inputs and 50 outputs a. 40 b. 50 c. 90 d. 2000 113.The _ _ _ _ _ _ _ _ _ of A TSI controls the order of delivering of slot values that are stored in RAM a. cross bar b. cross point c. control unit d. transreceiver 114.In _ _ _ _ _ _ _ _ _ _ circuit switching, delivery of data is delayed because data must be stored and retrieved from RAM. a. Space-division b. time-division c. virtual d. packet 115.To create a _ _ _ _ _ _ _, combine crossbar switches in stages a. Multistage switch b. cross point c. packet switch
d. TSI 116.In _ _ _ _ _ _ _ _ _ each packet of a message need not follow the same path From sender to receiver a. Circuit switching b. message switching c. a virtual approach to packet switching d. The datagram approach to packet switching 117.An important property of circuit switching is the need to setup an endto- end path _ _ _ _ _ _ _ _ any data can be sent a. after b. before c. along with which d. avoiding which 118.The elapsed time between the end of dialing and the start of ringing can be a minimum of _ _ _ _ _ _ _ _ _ a. 1sec b. 10sec c. 100sec d. 1000sec 119.A network using message switching is called _ _ _ _ _ _ a. store-and-forward b. forward-and-store c. store-and-send d. send-and-store 120._ _ _ _ _ _ _ _ Networks place a tight upper limit on block size, allowing packets to be buffered in router main memory instead of on disk. a. Message switching b. circuit switching c. packet switching d. store-and-forward 121.Which type of switching uses the entire capacity of a dedicated link? a. Circuit switching b. datagram packet switching c. virtual circuit packet switching d. Message switching
b. left to right c. right to left d. top to bottom 130.For n line, the complexity of a batcher switch grows like _ _ _ _ _ _ _ _ _ a. Log n
b. n 2
c. n log n
d. n log 2 n
131.The ISDN equivalent of DTE is a. TE b. TE c. NT d. TA 132.ISDN is an acronym for _ _ _ _ _ _ _ _. a. Information Services for Digital Networks b. Internetwork System for Data Networks c. Integrated Services Digital Network d. Integrated Signals Digital Network 133.Which of the following channel types is not standardized a. 4 kHz analog telephone channel b. 64kbps digital PCM channel for voice or data c. 16 kbps digital channel d. 16 kbps analog channel 134.Equipment that performs functions related to the OSI model's layers 1, 2 & 3 is called _ _ _ _ _ _ _ _. a. NT b. NT c. NT d. NT 135.The key idea behind ISDN is that of the _ _ _ _ _ _ _ _ _, a conceptual pipe between the customer and the carrier through which bits flow a. digital byte pipe b. analog bit pipe c. digital pipe d. digital bit pipe 136.The digital bit pipe can support multiple independent channels by _ _ _ _ _ _ _ _ _ of the bit stream. a. time division multiplexing
b. space division multiplexing c. frequency division multiplexing d. amplitude division multiplexing 137.What is PBX a. Public Branch eXchange b. Public Band exchange c. Private Branch eXchange d. Public Band eXchange 138.A _ _ _ _ _ _ _ _ _ provides a connection or a set of connection between switches. a. Transmission path b. Virtual path c. Virtual circuit d. Virtual connection 139.A _ _ _ _ _ _ _ _ _ _ is the physical connection between an end point and a switch or between two switches. a. Transmission path b. Virtual path c. Virtual circuit d. Virtual connection 140.The VPI of a UNI is _ _ _ _ _ _ _ _ _ _ _ _ bits in length a. 8 b. 12 c. 16 d. 24 141.The VPI of a NNI is _ _ _ _ _ _ _ _ _ bits in length a. 8 b. 12 c. 16 d. 24 142.In a VP switch the _ _ _ _ _ _ _ _ does not change while the _ _ _ _ _ _ _ _ can change. a. VPI, VCI b. VCI, VPI c. VP, VPC d. VPC, VP
