network models
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Lernkarten
OSI model
- physical
- data link
- network
- transportation
- session
- presentation
- application
layer 1
moves data between computers. cables, hubs, fiber, radio waves
layer 2
the interface between the computer and the network. NIC
layer 3
network layer. packets are created to get from one network to another
layer 4
transport. assembles, disassembles, and organizes packets
layer 5
session. initiates, accepts, opens, and closes sessions. it directs requests to the right programs
layer 6
presentation. converts information from lower layers into a format usable by the application layer and vice versa
layer 7
application. programs run by users to accomplish tasks over the network. encapsulation/de-encapsulation.
-browsers
-gmail/outlook etc
TCP/IP model
- application
- transport
- internet
- link/network interface
link layer/network interface
deals with frames
internet layer
IP packet layer
transport layer
transport, session, and a bit of the application layer
is TCP connection oriented or connectionless?
connection oriented
connection oriented
a connection which requires the server verify a good connection exists before sending information
is UDP connection oreinted or connectionless?
connectionless
connectionless communication
does not wait to verify the receiver is ready
-VOIP
application layer
combines the session, presentation, and application layer
in the TCP/IP model, which layers do which type of encapsulation?
link/network interface: frame with MAC and FCS
internet: packet
transport: segments and datagrams
application: data
in the OSI model, which layers do which type of encapsulation?
physical and data-link: frame with MAC and FCS
network: packets
transport: segments/datagrams
session, presentation, and application: data
