GCSE COMPUTER SCIENCE OCR FINAL EXAM UPDATED
QUESTIONS AND ANSWERS SURE A+
✔✔Bandwidth - ✔✔amount of data that can be transferred in a given time
✔✔Network Interface Card (NIC) - ✔✔allow a device to connect to a network
✔✔Switch - ✔✔connect devices on a LAN
✔✔Router - ✔✔responsible for transmitting data between networks
✔✔Ethernet - ✔✔a set of standards for connecting computers
✔✔Client-server Network - ✔✔client has connection to server, servers can backup and
store centrally but can be expensive and difficult to maintain
✔✔Peer-to-peer Network - ✔✔no central server, each computer equal in responsibility,
have to work as both server and a client.
✔✔Star Topology - ✔✔ADV: better performance, rest of network not affected in one
fails, simple to add more devices
DIS: wire needed for all devices, expensive
✔✔Mesh Topology - ✔✔ADV: faster
DIS: expensive
✔✔MAC Address - ✔✔assigned to all devices, unique to all devises and cannot be
changed, permanent, identifies the actual device.
✔✔IP Adress - ✔✔assigned either manually or automatic, the location of your device on
the internet
✔✔Packet Switching - ✔✔split data into packets to be sent across the network, each
packet given a number order of data, each router reads packet header and decides
which way to send it according to IP rules, packets then arrive and reassemble them in
the right order.
✔✔TCP/IP - ✔✔sets of rules for how devices connect on the network.
✔✔Hyper Text Transfer Protocol (HTTP) - ✔✔used to access websites and
communicate with web servers
✔✔HTTPS - ✔✔more secure - encryption
, ✔✔File Transfer Protocol (FTP) - ✔✔used to access, edit and move files between
devices
✔✔Post Office Protocol (POP3) - ✔✔used to retrieve emails from a server, holds until
download - then deletes from server
✔✔Internet Message Access (IMAP) - ✔✔used to retrieve emails, server holds until you
actually delete it- only download a copy
✔✔Simple Mail Transfer Protocol (SMTP) - ✔✔used to send emails, used to transfer
emails between servers
✔✔Layer - ✔✔ADV: manageable pieces, self-contained can change without effecting
others
✔✔Application Layer - ✔✔turning data into websites
✔✔Transport Layer - ✔✔controlling data flow - splitting data into packets
✔✔Network Layer - ✔✔making connections between networks
✔✔Data link Layer - ✔✔passing data over physical network-
✔✔Domain Name Server (DNS) - ✔✔translates websites' domain name into its IP
address
✔✔Virtual Network - ✔✔network that is entirely software based, created by partitioning
of some physical network
✔✔Blagging - ✔✔invented scenario to engage a targeted victim in a manner that
increases the chance the victim will divulge information
✔✔Phishing - ✔✔used to gain personal information for purposes of identity theft, using
fraudulent e-mail messages that appear to come from legitimate businesses.
✔✔Shouldering - ✔✔used to obtain information such as personal identification numbers
(PINs), passwords and other confidential data by looking over the victim's shoulder.
✔✔Malware - ✔✔malicious software - computer programs designed to infiltrate and
damage computers without the users consent.
✔✔Virus - ✔✔program loaded onto a user's computer without the user's knowledge and
performs malicious actions. It can self-replicate, inserting itself onto other programs or
files, infecting them in the process.
QUESTIONS AND ANSWERS SURE A+
✔✔Bandwidth - ✔✔amount of data that can be transferred in a given time
✔✔Network Interface Card (NIC) - ✔✔allow a device to connect to a network
✔✔Switch - ✔✔connect devices on a LAN
✔✔Router - ✔✔responsible for transmitting data between networks
✔✔Ethernet - ✔✔a set of standards for connecting computers
✔✔Client-server Network - ✔✔client has connection to server, servers can backup and
store centrally but can be expensive and difficult to maintain
✔✔Peer-to-peer Network - ✔✔no central server, each computer equal in responsibility,
have to work as both server and a client.
✔✔Star Topology - ✔✔ADV: better performance, rest of network not affected in one
fails, simple to add more devices
DIS: wire needed for all devices, expensive
✔✔Mesh Topology - ✔✔ADV: faster
DIS: expensive
✔✔MAC Address - ✔✔assigned to all devices, unique to all devises and cannot be
changed, permanent, identifies the actual device.
✔✔IP Adress - ✔✔assigned either manually or automatic, the location of your device on
the internet
✔✔Packet Switching - ✔✔split data into packets to be sent across the network, each
packet given a number order of data, each router reads packet header and decides
which way to send it according to IP rules, packets then arrive and reassemble them in
the right order.
✔✔TCP/IP - ✔✔sets of rules for how devices connect on the network.
✔✔Hyper Text Transfer Protocol (HTTP) - ✔✔used to access websites and
communicate with web servers
✔✔HTTPS - ✔✔more secure - encryption
, ✔✔File Transfer Protocol (FTP) - ✔✔used to access, edit and move files between
devices
✔✔Post Office Protocol (POP3) - ✔✔used to retrieve emails from a server, holds until
download - then deletes from server
✔✔Internet Message Access (IMAP) - ✔✔used to retrieve emails, server holds until you
actually delete it- only download a copy
✔✔Simple Mail Transfer Protocol (SMTP) - ✔✔used to send emails, used to transfer
emails between servers
✔✔Layer - ✔✔ADV: manageable pieces, self-contained can change without effecting
others
✔✔Application Layer - ✔✔turning data into websites
✔✔Transport Layer - ✔✔controlling data flow - splitting data into packets
✔✔Network Layer - ✔✔making connections between networks
✔✔Data link Layer - ✔✔passing data over physical network-
✔✔Domain Name Server (DNS) - ✔✔translates websites' domain name into its IP
address
✔✔Virtual Network - ✔✔network that is entirely software based, created by partitioning
of some physical network
✔✔Blagging - ✔✔invented scenario to engage a targeted victim in a manner that
increases the chance the victim will divulge information
✔✔Phishing - ✔✔used to gain personal information for purposes of identity theft, using
fraudulent e-mail messages that appear to come from legitimate businesses.
✔✔Shouldering - ✔✔used to obtain information such as personal identification numbers
(PINs), passwords and other confidential data by looking over the victim's shoulder.
✔✔Malware - ✔✔malicious software - computer programs designed to infiltrate and
damage computers without the users consent.
✔✔Virus - ✔✔program loaded onto a user's computer without the user's knowledge and
performs malicious actions. It can self-replicate, inserting itself onto other programs or
files, infecting them in the process.
