week 1 Flashcards
what are the 2 types of network environments
peer to peer
client/server network
what is a peer to peer network
- -> no dedicated servers
- -> any device can be configured to be accessible from other devices
- -> few devices/network devices
what is a client server network
- > dedicated servers
- > End devices are the clients taking care of the preprocessing and interfacing
- > more devices/network nodes
what is a personal area network
interconnection of it devices within a range of an individual person, typically 10 meters
whhat is local area network
localized to a building\, group of buildings or a. campus
typical speed is 100Mbps to 1Gps
usually owned by the implementer
what is the metropolitan area network
- > spans an area wider than the lan
- > links several lans in a metropolitan area such as a city
- > usually the telephone company, cable providers or other suppliers provide this service
what is the wide area network
- -> coverage can span from across a city to the entire globe
- -> communications carriers retain ownership of the line facilities
what is the internet
- -> interconnected networks around the world
- -> not owned by anyone
what are traditional separate network s
-> each network with its own rules
what is the converging network
-> capable of delivering video, voice and data over the same network infrastructure
what are the benefits of a converged network
- > just one network to manage
- > only one wired infrastructure simplifies cabling
- > lower implementation and management costs
what are the 4 characteristics of a reliable network
- -> fault tolerance
- -> scalability
- -> quality of service
- -> security
what is a fault tolerant network
limits the number of affected devices during a failure
built for quick recovery
depends on having multiple paths between source and destination of a message
having multiple paths to a destination is known as _____________
redudancy
how do networks provide redundancy
implementing a packet switchiing network
what is scalability
networks can continue to be expanded upon to support new users and applications
without disposing previously invested network architecture
what is quality of service
- -> classifying data traffic on their network
- -> a combination of communication characteristics and relative importance is used to do this
examples of priority decisions
- > time sensitive communication
- > non time sensitive communication
- > high importance to organization
- > undesirable communication
what are the 2 network security concerns that organizations haveinfroma
- -> network infrastructure security
- -> information security
what is network infrastructure security
physicaly secure the network devices and prevent unauthorised access
what is information security
- -> prevent unauthorised disclosure
- -> prevent theft of information
- -> prevent unauthorised modification of information
- -> prevent denial of service
what is tier 1 isp
providce national and international coverage
what is tier 2 isp
these are often smaller and provide regional service
usually pay tier 1 isp for their service
what are tier 3 isp
local providers of the service directly to the end users
usually connected to tier 2 isps and pay them for internet access
