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WorksheetsData communication
Total questions: 70
Worksheet time: 38mins
What is data communication?
Transfer of data from one point to the next.
Transfer of electronic data from one point to the next over a communication medium.
sending information
none of the above
Types of communication media
Twisted and coaxial cables
duplex
Bluetooth
wired and wireless
This is the process of using communication facilities such as the telephone and microwave relays to send data over a far distance without changing it.
wireless communication
Telecommunication
Data communication
wired communication
collection of two or more computers joined together through communication media, to share information is?
Computer network
Wired network
half duplex
full duplex
Which network connects computers within a large geographical area?
Wide Area Network
Local Area Network
Metropolitan Area Network
None of the above
radio-waves, microwave, infrared, satellite and bluetooth are examples of which media?
wired
television
wireless
computer
Full Duplex data flow means:
data travels in both directions, but only one direction at a time.
data travels in only one direction.
- data travels in both directions at the same time.
data does not travel.
a. Facilitates the sharing of resources
d. Reduces the cost of communication
data communication media
network topology
data flow
advantages of using a network.
What is protocol?
syntax
semantics
timimg
all of the above
The number of layers in ISO OSI reference model is __________
a) 5
b) 7
c) 6
d) 10
Popular forms of information include text, pictures, audio, video etc.
Message
Sender
Receiver
Transmission Media
Protocol
It can be a computer, workstation, telephone handset etc.
Message
Sender
Receiver
Transmission Media
Protocol
It is the device which receives the data messages.
Message
Sender
Receiver
Transmission Media
Protocol
Some examples include twisted-pair wire, coaxial cable, radio waves etc.
Message
Sender
Receiver
Transmission Media
Protocol
It is a set of rules that governs the data communications. It represents an agreement between the communicating devices.
Message
Sender
Receiver
Transmission Media
Protocol
the communication is unidirectional.
Simplex
Half-Dudplex
Full-Duplex
Answer NOT given
each station can both transmit and receive, but not at the same time. When one device is sending, the other can only receive, and vice-versa.
Simplex
Half-Dudplex
Full-Duplex
Answer NOT given
both stations can transmit and receive simultaneously.
Simplex
Half-Dudplex
Full-Duplex
Answer NOT given
How many layers are present in the Internet protocol stack (TCP/IP model)?
a) 5
b) 7
c) 6
d) 10
The number of layers in ISO OSI reference model is __________
a) 5
b) 7
c) 6
d) 10
Which of the following layers is an addition to OSI model when compared with TCP IP model?
a) Application layer
b) Presentation layer
c) Session layer
d) Session and Presentation layer
Application layer is implemented in ____________
a) End system
b) NIC
c) Ethernet
d) Packet transport
Transport layer is implemented in ______________
a) End system
b) NIC
c) Ethernet
d) Signal transmission
The functionalities of the presentation layer include ____________
a) Data compression
b) Data encryption
c) Data description
d) All of the mentioned
Delimiting and synchronization of data exchange is provided by __________
a) Application layer
b) Session layer
c) Transport layer
d) Link layer
In OSI model, when data is sent from device A to device B, the 5th layer to receive data at B is _________
a) Application layer
b) Transport layer
c) Link layer
d) Session layer
In TCP IP Model, when data is sent from device A to device B, the 5th layer to receive data at B is ___________
a) Application layer
b) Transport layer
c) Link layer
d) Session layer
In the OSI model, as a data packet moves from the lower to the upper layers, headers are _______
a) Added
b) Removed
c) Rearranged
d) Randomized
Which of the following statements can be associated with OSI model?
a) A structured way to discuss and easier update system components
b) One layer may duplicate lower layer functionality
c) Functionality at one layer no way requires information from another layer
d) It is an application specific network model
Transmission data rate is decided by ____________
a) network layer
b) physical layer
c) data link layer
d) transport layer
Which network connects computers within a large geographical area?
Wide Area Network
Local Area Network
Metropolitan Area Network
None of the above
Name the image shown.
network
bus topology
ring topology
star topology
Full Duplex data flow means:
data travels in both directions, but only one direction at a time.
data travels in only one direction.
- data travels in both directions at the same time.
data does not travel.
What is protocol?
syntax
semantics
timimg
all of the above
Discrete or continuous data?
Discrete
Continuous
Discrete or continuous data?
Discrete
Continuous
The first Network
CNNET
NSFNET
ASAPNET
ARPANET
A set of rules that governs data communication?
Protocols
Standards
RFCs
None of the mentioned
DHCP is Abbreviation of
Dynamic Host Control Protocol
Dynamic Host Configuration Protocol
Dynamic Hyper Control Protocol
Dynamic Hyper Configuration Protocol
The network layer protocol of internet is
ethernet
internet protocol
hypertext transfer protocol
none of the mentioned
The data link layer takes the packets from _________ and encapsulates them into frames for transmission.
network layer
physical layer
transport layer
application layer
DHCP (dynamic host configuration protocol) provides __________ to the client.
IP address
MAC address
Url
None of the mentioned
Which one of the following is a transport layer protocol used in internet?
TCP
UDP
Both (a) and (b)
None of the mentioned
Network Components are connected to the same cable in the topology.
Mesh
Bus
Ring
Star
Geometric arrangement of devices on the network is called
Protocols
Topology
Trailer
LAN
Which of the following is not a network device?
router
Modem
Bridge
Switch
Encryption & Decryption are the function of
Session Layer
Presentation Layer
Transport Layer
None of the Above
Frequency of failure and network recovery time after a failure are measures of the ____of a network
performance
reliability
security
feasibility
The performance of a data communications network depends on ____
the number of users
the transmission media
the hardware and software
all of the above
Which topology requires a central controller or hub?
mesh
star
bus
ring
Which topology requires a multipoint connection?
mesh
star
bus
ring
Communication between a computer and a keyboard involves ____
simplex
half-duplex
full-duplex
automatic
In a network with 25 computers, which topology would require the most extensive cabling?
mesh
star
bus
ring
A television broadcast is an example of ____transmission
simplex
half-duplex
full-duplex
automatic
In a ____ topology, if there are n devices in a network, each device has a n - 1 ports for cables
mesh
star
bus
ring
A ___ connection provides a dedicated link between two devices
point-to-point
multipoint
primary
secondary
In a _____ connection, more than two devices can share a single link
point-to-point
multipoint
primary
secondary
Duwi Publishing, with headquarters in Manila and branch offices in Lipa City and throughout South-East Asia, China and the USA, is probably connected by a _______.
LAN
MAN
PAN
WAN
Keeler Plumbing has a network consisting of two workstations and one printer. This is most probably a ______
PAN
WAN
LAN
MAN
Which topology features a point-to-point configuration?
mesh
ring
star
all of the choices
In a ___ the link, the only traffic is between the two connected devices.
secondary
primary
dedicated
public
In a mesh topology, the relationship between the device and another is _____
primary-to-peer
peer-to-primary
primary-to-secondary
peer-to-peer
A cable break in a _______ topology stops all transmission
mesh
star
bus
primary
Security and privacy are less of an issue for devices in a _______ topology.
mesh
tree
bus
star
The _____ model shows how the network functions of a computer ought to be organized
ITU-T
OSI
ISO
ANSI
along the ring.
along the ring.
