Upwork Networking Concepts Skill Test Questions

Question: 01
What does CSMA/CD stand for?

a.    Collision Sense Multiple Access/ Collision Detection
b.    Carrier Sense Multiple Access/ Collision Deterence
c.    Carrier Sense Multiple Access/ Collision Detection
d.    Collision Sense Multiple Access/ Carrier Detection


Question: 02
Which of the following is an ‘end-to-end’ layer?

a.    Physical
b.    Data Link
c.    Network
d.    Transport


Question: 03
According to the OSI model, which layer breaks down the data into frames?

a.    Network
b.    Data Link
c.    Transport
d.    Physical
    

Question: 04
According to the OSI model, which layer is responsible for routing?

a.    Session
b.    Data Link
c.    Presentation
d.    Network


Question: 05
What is the binary value of hex 9F?

a.    10011111
b.    10111000
c.    11110001
d.    10001111


Question: 06
According to the OSI model, which layer performs parity checking and error checking?

a.    Session
b.    Data Link
c.    Presentation
d.    Physical


Question: 07
What do you call a fibre optic cable in which the light signals follow a single path?

a.    Multi mode
b.    Single mode
c.    Broadband
d.    Baseband 


Question: 08
Old mainframe computers were an example of ______?

a.    Distributed computing
b.    Client server computing
c.    Peer to peer computing
d.    Centralized computing


Question: 09
How many bearer (B) and data (D) channels are there in a standard ISDN BRI service?

a.    2B + 1D channel
b.    16B + 1D channel
c.    23B + 1D channel
d.    24B + 2D channels


Question: 10
Which layer of the OSI model corresponds to TCP?

a.    Network
b.    Transport
c.    Session
d.    Data Link


Question: 12
According to the OSI model, which layer is responsible for sending acknowledgements?

a.    Session
b.    Transport
c.    Data Link
d.    Presentation


Question: 13
According to the OSI model, at which layer are network addresses assigned?

a.    Session
b.    Data Link
c.    Presentation
d.    Network


Question: 14
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?

a.    Network
b.    Data Link
c.    Transport
d.    Physical


Question: 15
Which cable used for RJ11 connectors?

a.    Thin Coaxial Cable
b.    Thick Coaxial Cable
c.    Unshielded Twisted Pair Cable
d.    Telephone Cable


Question: 16
Which of the following is a disadvantage of Client Server networks?

a.    They have poor security
b.    Data is not centrally organized
c.    Centralized administration is not possible
d.    They require high investment in the form of purchase of a server


Question: 17
Which protocol is connection oriented?

a.    TCP
b.    IP
c.    UDP
d.    ICMP


Question: 18
In a TCP/IP network, which layers are basically absent?

a.    Session, Presentation
b.    Transport, Session
c.    Session, Application
d.    Presentation, Application


Question: 19
Which network topology does FDDI use?

a.    Star
b.    Ring
c.    Bus
d.    Mesh


Question: 20
Which network topology does Ethernet use?

a.    Star
b.    Ring
c.    Bus
d.    Mesh


Question: 21
What is the IEEE 802.5 standard related to?

a.    Definition of the Logical Link Control (LLC) sublayer
b.    Token Ring
c.    Token Bus
d.    Ethernet


Question: 22
Which one of the following devices breaks up a Broadcast Domain by default?

a.    Hub
b.    Repeater
c.    Router
d.    Switch


Question: 23
Which layer of the OSI model corresponds to IP?

a.    Network
b.    Physical
c.    Session
d.    Data Link


Question: 24
According to the OSI model, which layer addresses the issue of connections (connection-oriented/ connection-less communication)?

a.    Physical
b.    Data Link
c.    Network
d.    Transport


Question: 25
What is a checksum?

a.    An error detection technique
b.    A network troubleshooting device
c.    Another name for protocol header
d.    Another name for protocol trailer


Question: 26
What is the maximum number of valid IP addresses in a class B network?

a.    65536
b.    65534
c.    256
d.    254
a.    Network
b.    Data Link
c.    Session
d.    Physical


Question: 27
Which of the following protocols does not support Routing?

a.    IPX/SPX
b.    TCP/IP
c.    NetBEUI
  

Question: 28
Which media suffers least from attenuation?

a.    Thin Coaxial Cable
b.    Thick Coaxial Cable
c.    Unshielded Twisted Pair Cable
d.     Fibre Optic Cable


Question: 29
At which layer does a Bridge operate?

a.    Network
b.    Physical
c.    Session
d.    Data Link


Question: 30
What is the purpose of the shielding in a Shielded Twisted Pair (STP) cable?

a.    To reduce attenuation
b.    To reduce cross talk
c.    To reduce Electro-Magnetic Interference


Question: 31
In a TCP/IP network, which of the following must be unique for each computer in the network?

a.    IP address
b.    Subnet mask
c.    Default Gateway


Question: 32
What is the full form of DSL?

a.    Digital Subscription Line
b.    Digital Super Link
c.    Digital Speed Line
d.    Digital Subscriber Line


Question: 33
Which of the following is a disadvantage of Peer Networks?

a.    They require high investment in the form of purchase of a server
b.    They require high investment in the form of purchase of a specialized network operating system
c.    They usually require a network administrator
d.    They have poor network security


Question: 34
According to the OSI model, which layer provides services such as file transfer, database access and email?

a.    Application
b.    Presentation
c.    Session
d.    Data Link


Question: 35
What do you call a medium which allows multiple channels?

a.    Multi mode
b.    Single mode
c.    Broadband
d.    Baseband


Question: 36
What is the maximum transmission speed of CAT 5 cable?

a.    10 Mbps
b.    16 Mbps
c.    100 Mbps
d.    1000 Mbps


Question: 37
How is a unique MAC address assigned to a Network Card?

a.    It is built into the card when the card is manufactured
b.    The network administrator must assign the address
c.    A unique address is automatically assigned when the card drivers are installed
d.    A unique address is automatically assigned whenver you boot up the computer


Question: 38
What does ISDN stand for?

a.    Information Systems Digital Network
b.    Integrated Services Digital Network
c.    Internet Services Digital Network
d.    Internet Systems Data Network


Question: 39
What is the speed of a E1 line?

a.    128 kbps
b.    144 kbps
c.    2.048 Mbps
d.    1.544 Mbps


Question: 40
What is attenuation?

a.    Distortion of the signal due to noise
b.    Distortion of the signal due to Electro Magnetic Interference
c.    Weakening of the signal in a cable over a distance
d.    Cross Talk

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