networking med-term 2024
1. At which layer of the OSI model would a logical address be added during
encapsulation?
a) physical layer
b) data link layer
c) network layer
d) transport layer
2. Which name is assigned to the transport layer PDU?
a) segment
b) frame
c) bits
d) data
3. Calculate the total delay from the sender to the receiver if they are
separated by
two 1-Gigabit/sec links, the packet size is 5000 Kbits, and each link
introduces propagation delay 5ms, queueing delay and processing delay
are 10ms and 5ms respectively.
a) 20
b) 25
c) 30
d) 35
4. The topology that has a central controller is called?
a) Star
b) Ring
c) Mesh
d) Bus
5. The time required to examine the packet's header and determine where to
direct the packet is part of?
a) Processing delay
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b) Queuing delay
c) Transmission delay
d) all of the above
6. Which OSI model layer defines how two devices should encode, encrypt.
and compress data so it is received correctly on the other end.
a) Transport layer
b) Presentation layer
c) Network layer
d) Physical layer
7. Which term describes the state of a network when the demand on the
network resources exceeds the available capacity?
a) convergence
b) congestion
c) optimization
d) synchronization
8. What method can be used by two computers to ensure that packets are not
dropped because too much data is being sent too quickly?
a) encapsulation
b) flow control
c) access method
d) response timeout
9. Which type of communication will send a message to a group of host
destinations simultaneously?
a) anycast
b) Unicast
c) Multicast
d) Broadcast
10. What is the purpose of protocols in data communications?
a) specifying the bandwidth of the channel or medium for each type of
communication
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b) specifying the device operating systems that will support the
communication
c) providing the rules required for a specific type of communication to
occur
d) dictating the content of the message sent during communication
11. What is the general term that is used to describe a piece of data at any
layer of a networking model?
a) frame
b) packet
c) protocol data unit
d) segment
12. What is done to an IP packet before it is transmitted over the physical
medium?
a) It is tagged with information guaranteeing reliable delivery.
b) It is segmented into smaller individual pieces.
c) It is encapsulated into a TCP segment.
d) It is encapsulated in a Layer 2 frame.
13. What is a distinguishing feature of circuit-switched networks?
a) Dedicated communication channels
b) Dynamic routing
c) Variable packet sizes
d) Connectionless communication
14. An intermediate device in a network that manages traffic based on MAC
addresses?
a) Router
b) Switch
c) Modem
d) Firewall
15. Which layer in the TCP/IP model is tasked with establishing, maintaining,
and terminating sessions between applications, ensuring reliable data
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exchange?
a) Application Layer
b) Transport Layer
c) Network Layer
d) Session Layer
16. Which statements about the relationship between LANs and WANs are true?
a) Both LANs and WANs connect end devices.
b) WANs connect LANs at slower speed bandwidth than LANs connect their
internal end devices.
c) LANs connect multiple WANs together.
d) WANs must be publicly-owned, but LANs can be owned by either public
or private entities.
17. What criterion is typically considered when selecting the appropriate
network medium?
a) Distance the medium can reliably carry the signal
b) Cost of end devices
c) Maximum transmission speed
d) Quality of service (QoS) requirements
18. At which OSI layer is port addressing typically implemented?
a) Data Link Layer
b) Network Layer
c) Transport Layer
d) Application Layer
19. How many total connections are there in a mesh network consisting of 7
devices?
a) 14
b) 21
c) 28
d) 42
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20. What is a common feature shared between client-server and peer-to-peer
(P2P) network architectures?
a) Both support devices in server/client roles
b) Both rely on centralized control mechanisms
c) Both use dedicated hardware for routing
d) Both have fixed network topologies
Answers
1. c) network layer
2. a) segment
3. d) 35
4. b) Ring
5. a) Processing delay
6. b) Presentation layer
7. b) congestion
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8. b) flow control
9. c) Multicast
10. c) providing the rules required for a specific type of communication to
occur
11. c) protocol data unit
12. d) It is encapsulated in a Layer 2 frame.
13. a) Dedicated communication channels
14. b) Switch
15. d) Session Layer
16. b) WANs connect LANs at slower speed bandwidth than LANs connect their
internal end devices.
17. a) Distance the medium can reliably carry the signal
18. c) Transport Layer
19. b) 21
n × (n − 1)
, where n is the number of devices
2
7 × (7 − 1)
= 21
Total connections =
2
Total connections =
​
​
20. a) Both support devices in server/client roles
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