11736143
Description
Mind Map by Jaya Sharma, updated more than 1 year ago
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Created by Jaya Sharma
almost 7 years ago
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Internet layers
- OSI model: Open System
Interconnection model. This
model has 7 layers-vertical
stack of 7 layers.
- Upper layer: software that provides
network services-like encryption and
connection management.
- Lower layer: hardware orientated
functions: routing, addressing and
flow control.
- 1. Application: SMTP,
FTP, Telnet, HTTP
- 2. Presentation:
format data(ascii) and
encryption
- 3. Session:
start and
stop session
- 4. Transport: TCP,
port numbers
- 5. Network: IP addresses,
routers
- 6. Data link: mac addresses
and switches
- 7. Physical: cables, network,
ethernet
- Upper layer: software that provides
network services-like encryption and
connection management.
- TCP/IP model: transmission control
protocol/internet protocol. This model has 4
layers: application, transport, internet and
link
- Application: includes
high level protocols-
FTP, HTTP, SMTP, DNS
- Transport: ensures reliable arrival of
messages and provides error checking
mechanisms and data flow controls
- Internet: packs data into data
packets (datagrams). Each
packets contains a source and
destination address-IP address.
Uses several protocols for routing
and delivering packets.
- Link: defines how datagrams
(like packets) can be passed
in a network.
- Application: includes
high level protocols-
FTP, HTTP, SMTP, DNS
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