Topic 3 - Networks

What is the use of a VPN

A protected LAN from outside access, workers to connect to companies internal network from anywhere, more people to work from their homes, remote working also known as telecommuting

Define the term Data Packet

Anything that is suitable for use with the computer, a small unit of data used in a network communication

Why compression of data be necessary when transmitting across a network

Easier to transmit data across a network due to size or space given or connectivity limitations

Define the word Compression

Encoding information using fewer bits than the original representation

Explain what is mean by a Firewall

Hybrid of software and hardware that controls incoming and outgoing network traffic, analyses data packets pre-determined by a set of rules

What are some of the names of compressed files

Lossy, Lossless, MP3, WAV, ZIP

Describe the difference methods of network security

Making sure systems dont get hacked, breaching of information, making sure data is not stolen or leaked

Name 4 hardware components of a wireless network

NIC, radio waves,

Name 3 software components of a wireless network

OS system, protocol stack, applications

What does the acronym for the network P2P stand for

Peer to Peer

Define the term: Topology

Physical layout of a network

What are some characteristics of different transmission media

Security, reliability, cost, speed

What are the three basic types of Topologies called?

Star, Ring, Bus

Define the acronym for the network called SAN

Storage Area Network

Define the term Protocol

The format and the order of messages exchanged between two or more communicating entities.

What are the outlines for the importance of standards in the construction of a network

The role in the network, manufacturers of network products to have a common ground on which system to build, interconnecting products

Define the acronym for the network called VLAN

Virtual Local Area Network

Define the acronym for the network called (W)PAN

Wireless Personal Area Network

User ID advantages and disadvantages

access rights, user groups, id can be stolen, system bypass, intercepting messages

What are the properties of network security called

confidentiality, integrity, maintaining accuracy of data, availability, dos attacks

What are the five functions of a protocol

ensuring data integrity, manage flow control, prevent deadlock, manage congestion, perform error checking

What are the 7 layers of communication over a network

physical, data link, network, transport, session, presentation, application

Encryption Security advantages and disadvantages

strong encryption, faster computers, easy to guess passwords, encryptions are designed to have backdoors built in

Network connection speeds can vary due to

time of day, distance, provider, cable quality

Outline the advantages and disadvantages of wireless networks

uses unlicensed radio spectrum, can be set up without cabling, roaming between access points, cheaper, interference, limited range, health concerns