Font size
WorksheetsOXFORD - A LEVEL - NETWORKS
Total questions: 30
Worksheet time: 30mins
A computer network is _______ computers connected together
a) 2
b) 2 or more
c) a large number of
What does LAN stand for?
a) Local Arena Network
b) Local Area Network
c) Long Area Network
d) Local Arena Name
Which network covers a large geographical area?
a) LAN
b) WAN
Which network covers a large geographical area?
a) LAN
b) WAN
A network is...
connects WiFi enable devices
set of computers and devices connected together
prevents external devices from unauthorized users
a group of friend chatting..
A router is..
device that provides resources
a network device for transmitting data
a switch which can forward data to the correct location
wireless amplifier
A bridge...
provides connection to the internet
device that connects two different types of networks
method for data communication
device that connects two lans
A gateway is ..
device that connects two lans
single communication path during data transmission
a device that connects two different types of networks
devices that prevents unauthorized access to the network
A wireless network interface card...
connects WiFi enable devices to a network
measures the range of frequencies on a network
receiving device for viewing data
connects wireless to the internet
The _______ provides your computer with a service (e.g. accessing websites, loading emails) in a client-server relationship
Client
Server
Which of these is NOT a type of server?
Web
NIC
USMA University has its campus buildings spread out across the city. Which network is being used?
LAN
WAN
Is not an example of optical communication method
Infrared
Fiber optic
Laser
wire cables
Is not an example of a transmission media...
Cables
Wireless
Optical
protocols
Protocols are
sets of rules that ensures data is transmitted between devices correctly
provides for wireless communication
increases your network bandwidth
creates data redundancy
Protocol that sends requests to a web server
FTP
IMAP
TCP/IP
HTTP
Network security is...
to provide access rights to users
Activities to protect the usability and integrity of network and data
Encryption of your dataThis is a wrong answer
Reliable backup system
MALWARE...
set of patches for upgrading a system
Allows unathorize access to your system
Connects directly to your hardware
Programs designed to tamper with your systems
SPYWARE is..
Refers to gadgets for surveillance
Secretly collects user information
Implants a virus in your installation
Type of malware that replicates itself automatically
Denial of service attack..
Denies access rights to unauthorized users
Refers to a security breach in your installation
Involves receiving more requests that the system can handle
Impersonates users to break in
Phising
Cybercrime that tricks users to provide sensitive data
Designed to send more requests that a system can handle
Activity to catch fish
Virus that activates itself at an specific time
Does not prevent a security breach...
Strong passwords
Reports on unauthorized access
Monitoring the traffic of your network
Backups
Strong password should never
Contain at least six characters long
Be changed every 3 months
Have your pets name
Kept in a safe place
Data breach which is very costly to organizations include a range of causes like..
software misconfiguration
lost hardware
weak password policies
lack of security policies
Data breach prevention requires a range of good practices
Site traffic and transactions encrypted with SSL
Good revision of user permission and rights access
Periodically scanning of servers, computers and networks
Strong password policies
Satellite communication implies..
use of satellites for communication purposes
delay in placing a message
distance and speed of the earth
have affordable and instant messaging
GEO statellites are..
placed at a distance of 500- 1500 kms for earth coverage
placed at a distance of 5000 - 12500 kms for earth coverage
placed at fixed points of 25800 kms for earth coverage
Satellite communication is an option for..
People who live in far distance places not covered by wireless or wide broadband connections
going to war
free TV and radio
improving fishing techniques
Data transfer in satellite communications is.
not suitable for online real time applications
creates a delay for the distance to cover
requires more expensive equipment
is faster than using fiber optic media
Global positioning systems
Uses satellites to calculate current position in earth
Originally developed for military purposes
Provides for variety of services like waze, navigation, vehicle tracking, and others
Provides tracking of UFOs..
