oDesk Networking Concepts Test Answers

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 Question 1
Which layer of the OSI model corresponds to IP?
a. Network
b. Physical
c. Session
d. Data Link

Question 2
 Which protocol is connection oriented?
a. TCP
b. IP
c. UDP
d. ICMP

Question 3
 According to the OSI model, which layer is responsible for routing?
a. Session
b. Data Link
c. Presentation
d. Network

Question 4
What is a token?
a. A part of the packet trailer in a token ring network
b. A part of the packet header in a token ring network
c. A special packet which travels from computer to computer in a token ring network.

Question 5 
 According to the OSI model, which layer addresses the issues of communication media and cable connectors etc?
a. Network
b. Data Link
c. Transport
d. Physical

Question 6
 According to the OSI model, which layer breaks down the data into frames?
a. Network
b. Data Link
c. Transport
d. Physical

Question 7
Which cable uses RJ45 connectors?
a. Thin Coaxial Cable
b. Thick Coaxial Cable
c. Unshielded Twisted Pair Cable
d. Shielded Twisted Cable

Question 8
Which cabling media does not suffer from Electro-Magnetic Interference (EMI)?
a. Thin Coaxial Cable
b. Thick Coaxial Cable
c. Unshielded Twisted Pair Cable
d. Fibre Optic Cable

Question 9
 Which layer is broken down into the MAC and LLC sub-layers?
a. Network
b. Data Link
c. Session
d. Physical

Question 10
What is multiplexing?
a. Allowing multiple sender and receivers to share a single channel
b. Allowing multiple senders and receivers to share a single media
c. Allowing bi-directional communication

Question 11
 According to the OSI model, which layer performs compression and decompression?
a. Application
b. Presentation
c. Session
d. Data Link

Question 12
Which of the following services is feasible using standard ISDN?
a. Fax
b. Voice Telephony
c. Data Transfer
d. Video Conferencing
d. All of the above

Question 13
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 Elector-Magnetic Interference

Question 14
According to the OSI model, which layer addresses the issue of switching (packet switching, message switching etc)?
a. Session
b. Data Link
c. Presentation
d. Network

Question 15
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

Question 16
What do you call a medium which only allows a single channel
a. Multi mode
b. Single mode
c. Broadband
d. Baseband

Question 17
Which of the following is a Class A network?
a. 172.0.0.0
b. 126.0.0.0
c. 192.0.0.0
d. 225.0.0.0

Question 18
According to the OSI model, at which layer are network addresses assigned?
a. Session
b. Data Link
c. Presentation
d. Network

Question 19
At which layer does a Hub operate?
a. Network
b. Physical
c. Session
d. Data link

Question 20
What is the speed of a E1 line?
a. 128 kbps
b. 144 kbps
c. 2.048 Mbps
d. 1.544 Mbps

Question 21
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 22
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 23
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 24
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 whenever you boot up the computer

Question 25
At which layer of the OSI model,does FTP operate?
a. Application
b. Transport
c. Session
d. Presentation

Question 26
Which of the following is not a fiber optic based network?
a. FDDI
b. ATM
c. Frame Relay
d. Ethernet

Question 27
What is the full form of PPPoE?
a. Point to Point Protocol over Exchange
b. Point to Point Password over Ethernet
c. Point to Point Protocol over Ethernet
d. None of the above

Question 28
What is ATM (Asynchronous Transfer Mode)?
a. It is a WAN technology based on frequency division multiplexing that uses fixed size packets known as cells
b. It is a WAN technology based on time division multiplexing that uses variable size packets.
c. It is a WAN technology based on time division multiplexing that used fixed size packets known as cells
d. It s a virtual circuit based WAN technology

Question 29
What is the binary value of hex BF?
a. 10100000
b. 10111111
c. 11111000
d. 00111011

Question 30
Which of the following is a Fiber Optic Connector?
a. RJ-11
b. RJ-45
c. MT=RJ
d. None of the above

Question 31
What is the speed of ISDN PRI service with 30B +1D channel?
a. 2.048 Mpbs
b. 1.544 Mps
c. 144 Kbps
d. 128 Kbps

Question 32
What is the maximum number of valid IP addresses in a class B network?
a. 65536
b. 65534
c. 256
d. 254

Question 33
For which layer of the OSI model has the Ethernet standard been defined?
a. Physical
b. Data Link
c. Network
d. Transport
e. Both a and b
f. Both b and c

Question 34
Which media access technique does Ethernet use?
a. CSMA/CA
b. CSMA/CD
c. Tokens

Question 35
How many twisted pairs does a UTP Cat 5 have?
a. 2
b. 4
c. 6
d. 8

Question 36
Which protocol user port number 23?
a. FTP
b. SMTP
c. Telnet
d. HTTP

Question 37
Which of the following is an 'end-to-end' layer?
a. physical
b. Data Link
c. Network
d. Transport

Question 38
What is the purpose of twisting the pairs of cables together in a UTP cable?
a. To reduce attenuation
b. To reduce cross talk
c. To reduce Electro-Magnetic Interference
d. To reduce noise

Question 39
What is the recommended maximum length(approx) for a segment of UTP cable?
a. 500m
b. 1km
c. 100m
d. 180m

Question 40
What is the X.25 protocol?
a. It is a packet switching WAN protocol based on public data networks
b. It is a packet switching WAN protocol based on public telephone networks
c. It is a packet switching wireless LAN protocol
d. It is a packet switching wireless Wan protocol


 A Newly Updated Section of Odesk Networking Concepts Test

Question 1

What does CSMA/CA stand for?
a. Collision Sense Multiple Access/ Collision Avoidance
b.Carrier Sense Multiple Access/ Collision Avoidance
c.Carrier Sense Multiple Access/ Collision Arbitration
d. Collision Sense Multiple Access/ Carrier Avoidance

Question 2
 What do you call a fiber optic cable in which the light signals follow multiple paths?
a. Multi mode
b. Single mode
c. Broadband
d. Baseband

Question 3
 Which of the following cables can be used to directly connect two PCs?
a. Straight cable
b. Cross cable
c. Rollover cable
d. Any of the above

Question 4
At which layer of the OSI model, does a Proxy Server operate?
a. Application
b. Transport
c. Session
d. Presentation

Question 5
Which of the following protocols does not support Routing?
a. IPX/SPX
b. TCP/IP
c. NetBEUI

Question 6
Which of the following ranges are reserved as private addresses?
a. 192.168.0.0 - 192.255.255.255
b. 172.16.0.0 0 - 172.255.255.255
c. 10.0.0.0 - 10.255.255.255
d. 172.16.0.0 - 172.31.255.255

Question 7
What is the binary value of 157?
a. 11000111
b. 10111001
c. 11100011
d. 10011101

Question 8
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 9
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 10
According to the OSI model, which layer performs parity checking and error checking?
a. Session
b. Data Link 
c. Presentation
d. Physical

Question 11
Which of the following is false with regard to asymmetric DSL?
a. It uses standard copper telephone cables
b. It delivers much higher speeds than a serial modem
c. It uses more channels for downloading data and fewer for uploading
d. It employs analog modulation to deliver data from your PC to the telephone service provider

Question 12
Which of the following cables can be used to connect a PC and a Hub?
a. Straight cable 
b. Cross cable
c. Rollover cable
d. Any of the above

Question 13
At Which layer of the OSI model, does HTTP operate?
a. Application 
b. Transport
c. Session
d. Presentation

Question 14
Which of the following devices breaks up a Broadcast Domain by default?
a. Hub
b. Repeater
c. Router
d. Switch

Question 15
According to the OSI model, which layer is responsible for sending acknowledgments?
a. Session
b. Transport
c. Data Link
d. Presentation

Question 16
Which of the following services is feasible using standard ISDN?
a. Fax
b. Voice Telephony
c. Data Transfer
d. Video Conferencing
e. All of the above 

Question 17
What is the full form of DSL?
a. Digital Subscription Line
b. Digital Super Link
c. Digital Speed Line
d. Digital Subscriber Line

Question 18
What is the maximum transmission speed of CAT 5 cable?
a. 10 Mbps
b. 16 Mbps
c. 100 Mbps
d. 1000 Mbps

Question 19
According to the OSI model, which layer performs encryption and decryption?
a. Application
b. Presentation
c. Session
d. Data Link

Question 20
What do you call a communication system in which data cannot be sent in both directions at the same time?
a. Half Duplex
b. Full Duplex
c. Asynchronous
d. Synchronous