UNIT-1
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--------------- have a single communication channel that is shared by all the users on the network.
a. Point-to-poit
b. Broadcast networks
c. Protocol
d. PAN
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Question 2
A node, which is more powerful, and can handle local information processing or graphics processing is called a------------------.
a. Workstation
b. Server
c. Network Operating System
d. Peer system
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Question 3
Computer networks may be classified according to the -------------- at which they operate according to some basic reference models that are considered to be standards in the industry such as the----------- OSI reference model and the -----------TCP/IP model.
a. network layer, seven layer, four layers
b. transport layer, five layer, six layer
c. Physical layer, five layer, four layer
d. Physical layer, four layer, four layer
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Question 4
The term Computer Network is used to mean an interconnected collection of------------------------
a. Mini computers
b. Super computers
c. autonomous computers
d. Micro computers
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Question 5
The world wide Internet is a well known example of ------------------.
a. PAN
b. Subnet
c. Intra-Network
d. inter-network
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UNIT-2
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Question 1
Match the following.
Physical Layer Choose... Dialogues control Routing Packet Raw bits Data encryption
Network Layer Choose... Dialogues control Routing Packet Raw bits Data encryption
Session Layer Choose... Dialogues control Routing Packet Raw bits Data encryption
Presentation Layer Choose... Dialogues control Routing Packet Raw bits Data encryption
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Question 2
------------------- is a set of rules governing the format and meaning of the packets, or messages that are exchanged by the peer entities within a layer.
a. Interface
b. Reference model
c. protocol
d. None of these
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Question 3
-------------, is a technique of conversion between the representation of digital data in user equipment and the corresponding signals transmitted over a communications channel.
a. Line coding
b. Demodulation
c. Modulation
d. Segmentation
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Question 4
In OSI-ISO architecture -------------------- layer is concerned with transmitting raw bits over the communication channel .
a. Data link Layer
b. Physical Layer
c. Session Layer
d. All of these
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Question 5
Which Layer is Responsible for Congestion Control ?
a. Network Layer
b. Datalink Layer
c. Transport Layer
d. Application layer
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UNIT=3
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Question 1
E-mail is an example of _______________ mode of communication where one party can send a note to another person and the recipient need not be online to receive the e-mail.
a. asynchronous
b. synchronous
c. full duplex
d. either A) or B)
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Question 2
Videoconferencing is an example for ___________________ communication
a. Simplex
b. Half duplex
c. Full duplex
d. serial
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Question 3
What are the advantages of synchronous communication. 1. it reduces overhead bits 2. The character is self contained & Transmitter and receiver need not be synchronized 3. It overcomes the two main deficiencies of the asynchronous method, that of inefficiency and lack of error detection. 4. Transmitting and receiving clocks are independent of each other
a. 1,2, and 3
b. 1 and 3
c. 1,2 and 4
d. 1,2,3 and 4
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Question 4
_____________ results from interference of different frequencies sharing the same medium.
a. Intermodulation
b. Cross talk
c. Impluse
d. Thermal noise
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Question 5
______________ is/ are caused by the random motion of the electrons in a wire and is unavoidable.
a. Dispersion
b. Thermal noise
c. Delay distortion
d. all of these
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UNIT=4
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Question 1
FDM Choose... Light streaming digital communication analog communication internet
TDM Choose... Light streaming digital communication analog communication internet
WDM Choose... Light streaming digital communication analog communication internet
Packet switching Choose... Light streaming digital communication analog communication internet
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Question 2
Following are the advantages of tree topology i)Point-to-point wiring for individual segments. ii)Supported by several hardware and software venders. iii) Easy to install and wire
a. i) only
b. i) and ii) only
c. iii) only
d. i) ,ii) and iii)
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Question 3
The most well-Known use of _________________ is internet
a. Packet switching
b. circuit switching
c. message switching
d. multiplexing
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Question 4
The type of network topology in which all of the nodes of the network are connected to a common transmission medium which has exactly two endpoints is called ________________________
a. Bus
b. Ring
c. Tree
d. Mesh
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Question 5
_______________ combines characteristics of linear bus and star topologies.
a. Ring topology
b. A hybrid topology
c. A tree topology
d. mesh topology
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UNIT=5
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Question 1
CAT3 cable Choose... 16 to 100 MHz 250 MHz to 600 MHz high speed computer communication 2 GHz t0 40 GHz
CAT5 cable Choose... 16 to 100 MHz 250 MHz to 600 MHz high speed computer communication 2 GHz t0 40 GHz
CAT6 & CAT 7 cable Choose... 16 to 100 MHz 250 MHz to 600 MHz high speed computer communication 2 GHz t0 40 GHz
wireless transmission Choose... 16 to 100 MHz 250 MHz to 600 MHz high speed computer communication 2 GHz t0 40 GHz
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Question 2
The key concern in the design of transmission system is _____________ and _____________
a. data rate ,distance
b. speed, accuracy
c. accuracy, simplicity
d. distance , cost
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Question 3
Transmission medias are classified into two main categories, which are ______________ and _______________.
a. twisted pair, coaxial
b. guided , unguided
c. analog, digital
d. synchronous, Asynchronous
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Question 4
Which of the following transmission media suffers more from transmission impairment.
a. coaxial cable
b. Optical fiber
c. twisted pair
d. wave guides
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Question 5
Which of these is an example for unguided transmission ?
a. coaxial cable
b. optical fibers
c. wireless
d. twisted pairs
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UNIT-6
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Question 1
State true or false
i) The Hamming Distance for the codes generated using either even or odd parity will be 2. ii) The DLL translates the physical layers raw bit stream into discrete units called packets iii) The network layer wants messages to be delivered to the remote peer in the exact same order as they are sent. iv) The data link layer is split into MAC and LLC sub layers.
a. true, true, true true
b. true, false , true, false
c. true, false, true, true
d. true, true, false, false
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Question 2
The DLL translates the physical layer's raw bit stream into discrete units called __________________
a. packets
b. messages
c. frames
d. TPDU
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Question 3
The data link layer is split into __________________ and ___________________ sub layers.
a. MAC , LLC
b. MCC , LAC
c. MCM , LCM
d. CRC , MLC
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Question 4
The Hamming Distance for the codes generated using either even or odd parity will be__________________
a. 2
b. 4
c. 1
d. 0
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Question 5 Which layer transfers data between adjacent network nodes in a wide area network or between nodes on the same local area network segment.
a. physical layer
b. Data link layer
c. Network layer
d. Session layer
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UNIT-7
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Question 1
Match the following
preamble Choose... 1 byte 2 byte error checking 10101010
SOF Choose... 1 byte 2 byte error checking 10101010
checksum Choose... 1 byte 2 byte error checking 10101010
Length Choose... 1 byte 2 byte error checking 10101010
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Question 2
preamble field of 802.3 frame is encoded using __________________ encoding
a. Manchester
b. differential Manchester
c. Bi polar
d. uni polar
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Question 3
Pure ALOHA has a maximum throughput of __________________
a. 16.4 %
b. 18.4 %
c. 17.4 %
d. 1 %
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Question 4
What is the pattern of a preamble ?
a. 11110000
b. 11111111
c. 00000000
d. none of these
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Question 5
Who defined ALOHA protocol ?
a. Claude shanon
b. Nyquist
c. Abramson
d. Newton
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UNIT-8
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Question 1
How many levels of priority is defined in IPV4 protocol?
a. 4
b. 2
c. 8
d. 6
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Question 2
State true or false i) Low bandwidth lines cause congestion ii) Slow processors cause congestion. iii) Adding more memory increase congestion
a. true, true, false
b. false ,true, false
c. true, false , false
d. true , true, true
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Question 3
Where are routing tables placed ?
a. in network interface card
b. in routers memory
c. in server memory
d. in a subnet's memory
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Question 4
Which of these is/are the properties of routing algorithm ?
a. correctness
b. simplicity
c. stability
d. all of these
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Question 5
__________________is a static algorithm in which every incoming packet is sent out on every outgoing line except the one it arrives on.
a. Flooding
b. Congestion
c. Link state routing
d. Distance vector
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UNIT=9
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Question 1
How many bits are reserved for future use in TCP protocol ?
a. 4
b. 6
c. 7
d. 2
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Question 2
Packet lifetime can be restricted to a known maximum by using this /these method.
a. Restricted subnet design
b. putting a hop counter in each packet
c. time stamping each packet
d. all of these
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Question 3
State true or false
1. TCP protocol is a connection less protocol. 2. Automatic repeat request schemes may be used to retransmit lost or corrupted data. 3. Automatic repeat request may keep the network in a congested state. 4. TPDU is an acronym for transfer product data unit.
a. true true true true
b. False true false false
c. false true true false
d. true false false true
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Question 4
State true or false i. The connection establishment protocol introduced by Tomlinson is known as a three way handshake. ii. Asymmetric release is the way the telephone system works. iii. The 16-bit checksum field is used for error-checking of the header and data.
a. false, false, false
b. true, true, true
c. true, false, false
d. false, false, true
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Question 5
TPDU is an acronym for _________________
a. Transport protocol data unit
b. trasferent product data unit
c. transitive product data unit
d. transfer protocol digital unit
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Question 6
Two main important protocols of transport layer are ________________ and __________________.
a. SMTP, HTTP
b. TCP, UDP
c. UDP, HTTP
d. SMTP, UDP
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Question 7
Which of these function belongs to transport layer ?
a. routing of packets
b. congestion control
c. email
d. none of these
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Question 8
Which of these is a minimal message-oriented transport layer protocol.
a. UDP
b. SMTP
c. HTTP
d. TCP/IP
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Question 9
Which of these layer is responsible for flow control ?
a. Network layer
b. Transport Layer
c. session layer
d. Application Layer
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Question 10
Which of these protocol guarantees reliable and in-order delivery of data from sender to receiver. ?
a. TCP/IP
b. UDP
c. STP
d. TDP
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Question 11
_________________ is/are used for error detection.
a. Parity bit
b. checksum
c. both A) and B)
d. neither A) nor B).
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UNIT-10
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Question 1
Match the following
Network layer Choose... Gateway HUB Switch Router
Data link layer Choose... Gateway HUB Switch Router
Transport layer Choose... Gateway HUB Switch Router
Physical layer Choose... Gateway HUB Switch Router
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Question 2
DSL stands for _________________
. a. data subscriber lines
b. dual subscriber lines
c. digital subscriber lines
d. delay subscriber lines
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Question 3
Hubs are classified as _______________ and _________________ hubs.
a. active, passive
b. synchronous, asynchronous
c. simplex, half duplex
d. one way , multi way
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Question 4
In ___________________ configuration, the switch begins to forward the packet as soon as it is received. No error checking is performed on the packet, so the packet is moved through very quickly.
a. cut-free
b. franment-free
c. store-and-forward
d. cut-through
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Question 5
State true or false i. Both hubs and switches come in managed and unmanaged versions. ii. A bridge unlike repeaters will not start retransmission until it has received the complete packet. iii. The looping problem cannot be avoided by using the Spanning Tree Algorithm (STA).
a. true, true, true
b. false, true, false
c. true, true, false
d. false, false, false
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Question 6
Which of these cable is/are used to connect devices to hubs and switches.
a. crossover
b. straight-through
c. co-axial
d. both A) and B)
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Question 7
Which of these device operate at the network layer of OSI/ISO reference model.
a. HUB
b. ROUTER
c. SWITCH
d. ALL OF THESE
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Question 8
Which of these is a feature of hubs ?
a. Hubs amplify the incoming signal.
b. Hubs understand frames, packets or headers
c. All lines coming into a Hub must operate at a same speed.
d. all of these
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Question 9
_______________ are fast multi-port bridges that provide an economical way to resolve network congestion.
a. Switches
b. Gateways
c. Routers
d. Brouters
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