IB Computer Science Topic 3 Networks
Version 3 Study Guide Exam And 100%
Correct Answers.
Protocol - Answer A set of predetermined rules on how information is sent and received.
Virtual Private Network (VPN) - Answer A paid (but sometimes free) service that allows the user to
create an encrypted link between the user and a remote server. Once connected, the user can
anonymously access the information, data, or the internet using the remote server instead of his own
machine.
Computer network - Answer Allows different computers to communicate with one another.
Local Area Network (LAN) - Answer A computer network that spans a relatively small area (a single
room, house, building, etc.)
Wide Area Network (WAN) - Answer A system of LANs that spans a relatively large geographical area.
Wireless Local Area Network (WLAN) - Answer A wireless distribution method for a local area network
that use high-frequency radio waves and often include an access point to the Internet.
Access Point - Answer A hardware device or a computer's software that acts as a communication hub
for users of a wireless device to connect to a wired LAN.
Node - Answer A single computer or device on a computer network.
Peer to Peer (P2P) - Answer Computer systems that communicate to each other through a network
without passing through a central server.
Internet - Answer A WAN that spans the entire world.
, Extranet - Answer An intranet that can be partially accessed by authorized outside users, enabling
businesses to exchange information over the Internet securely.
Intranet - Answer A private network that is contained within an enterprise. It may consist of many
interlinked local area networks and also use leased lines in the wide area network. Typically, an intranet
includes connections through one or more gateway computers to the outside Internet.
Storage Area Network (SAN) - Answer A high-speed network of storage devices that also connects
those storage devices with servers.
Direct attached storage (DAS) - Answer Digital storage that is attached directly to a computer or a
server. In other words, this isn't part of a storage network. The most familiar example of this is the
internal hard drive in a laptop/desktop.
Personal Area Network (PAN) - Answer The interconnection of devices within the range of an individual
person, typically within a range of 10 meters. For example, a person traveling with a laptop and a
portable printer could interconnect them.
Wireless Personal Area Network (WPAN) - Answer A personal area network that is wireless. Most
common example is Bluetooth.
Physical, Data Link, Network, Transport, Session, Presentation, and Application - Answer These are the
7 layers of the Open Systems Interconnection (OSI) Model.
Tunneling - Answer The transmission of data intended for use only within a private, usually corporate,
network through a public network in such a way that the routing nodes in the public network are
unaware that the transmission is part of a private network. VPNs use this.
VPN Gateway - Answer A type of networking device that connects two or more devices or networks
together in a VPN infrastructure.
Data packet - Answer Large digital files are divided up into these smaller messages to be sent
individually.
Version 3 Study Guide Exam And 100%
Correct Answers.
Protocol - Answer A set of predetermined rules on how information is sent and received.
Virtual Private Network (VPN) - Answer A paid (but sometimes free) service that allows the user to
create an encrypted link between the user and a remote server. Once connected, the user can
anonymously access the information, data, or the internet using the remote server instead of his own
machine.
Computer network - Answer Allows different computers to communicate with one another.
Local Area Network (LAN) - Answer A computer network that spans a relatively small area (a single
room, house, building, etc.)
Wide Area Network (WAN) - Answer A system of LANs that spans a relatively large geographical area.
Wireless Local Area Network (WLAN) - Answer A wireless distribution method for a local area network
that use high-frequency radio waves and often include an access point to the Internet.
Access Point - Answer A hardware device or a computer's software that acts as a communication hub
for users of a wireless device to connect to a wired LAN.
Node - Answer A single computer or device on a computer network.
Peer to Peer (P2P) - Answer Computer systems that communicate to each other through a network
without passing through a central server.
Internet - Answer A WAN that spans the entire world.
, Extranet - Answer An intranet that can be partially accessed by authorized outside users, enabling
businesses to exchange information over the Internet securely.
Intranet - Answer A private network that is contained within an enterprise. It may consist of many
interlinked local area networks and also use leased lines in the wide area network. Typically, an intranet
includes connections through one or more gateway computers to the outside Internet.
Storage Area Network (SAN) - Answer A high-speed network of storage devices that also connects
those storage devices with servers.
Direct attached storage (DAS) - Answer Digital storage that is attached directly to a computer or a
server. In other words, this isn't part of a storage network. The most familiar example of this is the
internal hard drive in a laptop/desktop.
Personal Area Network (PAN) - Answer The interconnection of devices within the range of an individual
person, typically within a range of 10 meters. For example, a person traveling with a laptop and a
portable printer could interconnect them.
Wireless Personal Area Network (WPAN) - Answer A personal area network that is wireless. Most
common example is Bluetooth.
Physical, Data Link, Network, Transport, Session, Presentation, and Application - Answer These are the
7 layers of the Open Systems Interconnection (OSI) Model.
Tunneling - Answer The transmission of data intended for use only within a private, usually corporate,
network through a public network in such a way that the routing nodes in the public network are
unaware that the transmission is part of a private network. VPNs use this.
VPN Gateway - Answer A type of networking device that connects two or more devices or networks
together in a VPN infrastructure.
Data packet - Answer Large digital files are divided up into these smaller messages to be sent
individually.
