DV Chapter 1 Flashcards
Chapter 1 notes
What is a LAN?
A LAN is a Local Area Network. End devices connected to a single router that communicate with each other.
What is a WAN?
A WAN is a Wide Area Network. Usually a series of LANS connected by something (the internet is the worlds largest WAN. Other examples include cloud services) WANs are normally run and owned by a company or ISP.
What is the internet?
The internet is a massive WAN that connects thousands of LANs and WANs together.
What is an Intranet?
An Intranet is a group of LANs and WANs run by a single organization, and only accessed by members of that organization (Example, the network that doctors and nurses connect to at a hospital)
What is an Extranet?
An Extranet is an Intranet that members of the public have limited access to. (Example, Accessing your medical records through the My Health Portal login)
What differentiates Peer-to-Peer and Server-Based networking?
Peer-to-peer. All computers on the network act as clients and servers. No centralized administration, and less secure, but easier to set up.
Server Based networking. The server is on its own dedicated host, and the other computers on the network act as clients. This is more secure and has a centralized administration
What are the four basic requirements of a reliable network?
Fault tolerance, Scalability, QoS (Quality of Service) and Network Security.
Describe Fault Tolerance.
Fault tolerance pertains to limiting the amount of devices affected during a failure. (example. offering data multiple paths it can take. if one fails, it switches to the next until finding one that works)
Describe QoS (Quality of Service)
QoS. Making sure a network can handle the stress that it is presented, and operate at an acceptable speed. The main focus of QoS is prioritizing time sensitive traffic.
Describe Scalability.
Scalability is the ability for a network to grow along with its user base. It must be able to take on new users and applications without disrupting current service.
What are the two main parts of network security?
Network Infrastructure Security Hardware that prevents security breaches from occurring.
Network Information Security. Software that prevents security breaches from occurring.
Describe Basic network infrastructure and core security (confidentiality, integrity, availability)
Confidentiality: Information must only be shared with people who are meant to see it.
Integrity: Data must not be altered on its way to its destination, and has to be in its original state on arrival
Availability: Timely access to a network.
What is a BYOD network trend?
BYOD stands for Bring Your Own Device. It is a network where anybody with the access credentials can bring their own end device and connect to it.
Describe Cloud Computing
Cloud computing is when a network pays a company to give them virtual storage for files over a network.
Name basic threats to a network.
Viruses, worms, trojan horses, spyware, Day Zero attacks ( attacks on the first few hours after a network goes live) DoS attacks (Denial of Service) identity theft
