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WorksheetsData Com and Network basics
Total questions: 95
Worksheet time: 48mins
The conversion from digital signals to analog signals and vice versa is called______________.
Modem/Demodem
Modulation/Demodulation
Analoging
De-Digitizing
Types of communication media
Twisted and coaxial cables
duplex
Bluetooth
wired and wireless
collection of two or more computers joined together through communication media, to share information is?
Computer network
Wired network
half duplex
full duplex
The term 'bandwidth' refers to .
the amount of data that can be downloaded via radio waves
the maximum amount of data that can be transferred at any time via an Internet connection
the number of minutes you use while online
the method you use to connect to the Internet
Which one of the following is a typical example of a web address?
http:telko@info.uk
alex@intellect.co.za
http://www.eaglewood.co.za
C:/computers.za
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
a. Facilitates the sharing of resources
d. Reduces the cost of communication
data communication media
network topology
data flow
advantages of using a network.
The term telecommunication includes
Telephony
face to face communication
Telegraphy
Television
Data communications refers to the transmission of the digital data between two or more computers and a computer network.
True
False
The physical connection between networked computing devices is established using either __________ or ________.
Cable Media
Hathway
Wireless Media
None of these
Message can be _________,
_____________ &______________ files.
Text
Audio
Video
Alphabets
The computer or device that is used for sending data is called____________-
Sender
Reciever
Manager
Follower
(a) are rules under which data transmission takes place between sender and receiver.
The means through which data is sent from one location to another is
called transmission medium.
True
False
What is the collection of two or more computers joined together through communication media, to share information and resources called?
Network
Internet
half duplex
full duplex
A LAN is big enough to cover what area?
A university campus
A single house
A single department
All of the above
An advantage of using a LAN is that?
The users are at risk of getting a virus
All the resources can be shared with others
The network is inexpensive to maintain
No real advantage
This picture represents
(a)
(a) connects computers across a city
Which of the following statements best describes data transmission?
The process of removing data from one specific location
Communication on the Internet
The process of transferring data from one point to another
The process of securing data in a network
Data transmission can occur in a number of ways, select the most common ways below (select all that apply)
Copper Cable
Wireless (Radio Frequency)
Fiber Optic Cables (Light)
Infra red
The speed of transmission is described with what term?
Broadband
Bandwidth
Connection Speed
Ping
Define LAN
Connected devices share the resources of a single processor or server within a small geographic area
Normally find within a business and school
These are computers that share resources over a large area
None of the above
Mr John is a small businessman that runs a Hardware, he has been experiencing problem with his small accounting department which he depends on to provide him with the sales reports. Mr John want to be able to shared information between his 7 computer station and have on central printing area, what type of network would you recommend to Mr John?
LAN
MAN
WAN
SAN
What is a network?
A group of 1 or more devices which share resources
A group of 2 or more devices linked together which share resources
When 2 or more computers are in the same building.
A group of 3 or more devices which communicate
Which of these best describes a wide area network (WAN)?
A network that covers a small geographical area.
A network that covers a large geographical area.
A network limited to just one room.
LAN, WAN, CAN, MAN
LAN, CAN, MAN, WAN
CAN, WAN, LAN, MAN
WAN, MAN, CAN, LAN
"These types of networks are typically seen in universities, large K-12 school districts or small businesses and can be spread across several buildings that are fairly close to each other so users can share resources"
Which of the networks below does the description above best label?
Local Area Network
Campus Area Network
Metropolitan Area Network
Wide Area Network
"These types of networks are typically applied to the interconnection of networks in a city into a single larger network (which may then also offer efficient connection to a wide area network). "
Which of the networks below does the description above best label?
Local Area Network
Campus Area Network
Metropolitan Area Network
Wide Area Network
"These types of networks are typically used to ensure that computers and users in one location can communicate with computers and users in other locations. The implementation of this network can be done either with the help of the public transmission system or a private network"
Which of the networks below does the description above best label?
Local Area Network
Campus Area Network
Metropolitan Area Network
Wide Area Network
A _____________________Network consist of several LANs, and can connect computers across cities, states and even countries. They are mainly used by companies that have offices in different cities and countries.
LAN
MAN
WAN
None of the Above
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
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
What forwards data packets to the right computer?
Router
Internet
Ethernet Cable
Clock
The Internet is like a massive network of routers.
True
False
How does the optical fiber cables work in network?
Your devices send the domain name to DNS, than
DNS send the IP address of Domain Name to Data Center, than
Data Center send via the optical fiber network to the router, than
routers send to your device
Your devices send the its IP address to Data Center, than
Data Center send the IP address to DNS, than
DNS send the domain name to the router, than
routers send to your device
Your devices send the device's IP address to DNS, than
DNS send the IP address to the router, than
IP address send to the router, than
router send to your device
Your devices send the its IP address to Data Center, than
Data Center send the IP address to DNS, than
DNS send the domain name to the router, than
routers send to the optical fiber network
What is not function of protocol?
Set the rules of data packet convertion
Rules for routers
Set the rules attachment of the source and destination of each packet
Manage IP address assignment
Which two statements are true about layer 2 switches?
A switch uses IP address tables to determine where to forward packets
Switches are faster than hubs in all circumstances
If a switch does not know where to forward a frames, it floods it out all ports
Store-and-forward is the fastest switching method available
Switch uses MAC address tables to determine where to froward frames
The primary method of communication on the internet uses two sets of rules known as:
TCP & IP
Ports & Protocols
Fios & DSL
Packets & Hubs
Is a specialized networking device connected to two or more networks running software that allows the router to move data from one network to another.
Hubs
Switches
Routers
Is a device that channels incoming data from any of multiple input ports to the specific output port that will take the data toward its intended destination.
Hubs
Switches
Routers
Is a type of cabling that is used for telephone communications and most modern Ethernet networks. A pair of wires forms a circuit that can transmit data.
Fiber optic cable
Twisted Pair Cable
Coaxial cable
Light signals are transmitted is this type of network media
Coaxial Cable
Twisted Pair Cable
Fiber Optic Cable
Networks are comprised of __________ (choose all that apply)
end devices
infrastructure devices
cables and media
applications
protocols
Which of the following are not considered client or end devices? (Choose two)
laptop
tablet
access point
IP Phone
hub
What is required for traffic from the LAN to get to a remote LAN or the Internet?
magical fairy dust
hub
gateway router
DMZ
What does this logical network icon stand for?
switch
router
access point
wireless router
What does this logical network icon stand for?
switch
router
access point
hub
The key difference between a switch and a hub is that ________________.
switches forward all packets out all ports while hubs don't.
hubs learns mac addresses while flooding out all of the ports.
hubs forward all packets out all ports while switches intelligently forward by learning mac addresses.
switches are prettier than hubs?
True or False: Bits travel through media like copper or fiber optics but not through radio waves.
True
False
These devices use network layer addresses configured by the administrator to forward traffic (choose all that apply)
routers
switches
multilayer switches
powerline networking
What is the most common connector used with ethernet cables?
RJ-45
RJ-55
RJ-11
MJ-45
What are routers used for?
This is used to locate the network
Routers store IP addresses in something
Routers enable data to be sent (routed) between different types of networks
What exactly do routers do?
plugged into a computers wired network interface card and
connects it to the network.
can transfer data faster than wireless
routers can connect different types of networks together
and send data between them.
The router performs the following
functions: ( choose 3)
They can read data and decide where to send it
All computers and devices connected to the internet are assigned a unique number
They can decide on the fastest route in which to send the data
They can make the format of the data suitable for the network where it is being sent.
What are network interface cards used for?
Some wires are used to send data to the computer
Network Interface Cards are used to connect individual computers/devices to a network.
me wires are used to receive data from the computer
There are two types of network interface card which one is on the photo
Wired network interface card (Where cables are used to connect computers)
Wireless network interface card (Where computers are connected using Wi-Fi)
What are hubs used for?
Hubs allow computers and devices to plug into their ports to connect to each other and share files, data and resources.
Each network device has a Media Access Control (MAC) address which uniquely identifies it.
connect different types of networks so that they act as one single LAN and thus can communicate with each other
Hubs are 'non-intelligent' devices and they don't manage any of the data that flows through them.
True
False
The hub simply sends the data onto every computer/device on the network
True
False
What are switches used for?
can also reverse this process and convert the analogue signals from the
telephone line into digital data (demodulate) so the computer can use it.
Switches are similar to hubs in that they connect computers/devices to form a LAN.
old technology and have been replaced by switches which manage data more effectively and operate much faster
How do switches manage network data?
choose 3
Each network device has a Media Access Control (MAC) address which uniquely identifies it.
This lack of data management makes networks that are connected by hubs very slow because there is a lot of unnecessary data flowing around.
Data sent to the switch contains the MAC address of the sending device and the MAC address of the receiving device.
Data transferred over cables is more secure than over wireless (Hackers can't intercept data easily).
The switch will check these addresses and only send the data to the relevant device rather than to all devices.
Connects to the Internet through an Internet Service Provider.
Cable
Modem
IP address
Hub
