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Network Protocols Pg17-19 - Coggle Diagram
Network Protocols Pg17-19
A
protocol
is set of rules for how
devices communicate
and how
data is transmitted
Determines how the data should be organsied
Determines how the two devices should start and end
MAC Addresses
Every device has its own unique address
so it can be found on a network
These are assigned to all network enabled devices by manufacturer.
48 or 64 bit binary
numbers so it is easy to convert to HEX
Mainly used by the ethernet protocol on LANs.
IP Addresses
Used when
sending data
between TCP/IP
Are not linked to hardware, unlike MAC
Static
Assigned
manually
Permanent
Used for
websites
and connecting printers to LAN
Expensive
Dynamic
assigned everytime a devce logs onto a network
ISPs use this as it is
cost-effective and resuable
Changes everytime the device logs on
32 bit or 128 bit
binary number depending on version
32 bit converts into 4 denary
128 bit converts into 8 HEX numbers
Packet switching
Data is sent between networks in
packets
Data Packets
Header - Has the
control information
Like the envelope
Destination address
Source address
Packet Number
Payload
The letter inside the envelope
Protocols
FTP (File Transfer Protocol)
Used to
access, edit and move
files between devices
on a network
POP3 (Post office Protocol Version 3)
Used to
retrieve emails
from server. Server
holds it
until you download it
HTTPS (HTTP Secure)
Encypted
version of
HTTP
IMAP (Internet Message Access Protocol)
Server
holds the email until you delete
, you download a copy
HTTP (Hypertext transfer protocol)
Used by
web browsers to access websites and communicate with servers
SMTP (Simple Mail Transfer Protocol)
Used to
send
emails
TCP/IP
Dictates
how data is sent
between networks
Transmission Control Protocol (
TCP
)
Sets rules for
how devices connect on the network
Controls the splitting of data into packets
Controls the
reassembling of the packets
Responsible for
checking the data is correctly sent and delivered
Internet Protocol (IP)
Responsible for packet switching
Network Protocols are divided into layers
Link Layer (L1)
Passing data over a
physical network e.g ethernet
Internet Layer (L2)
Making connections between networks, directing data packets and handling traffic.
IP
and
used by routers
Transport Layer (L3)
Controls data flow.
e.g
splitting data into packets, checking packets are correctly delivered
.
TCP
Application Layer (L4)
Turning
data into websites
and
other applications
.
HTTP, FTP, SMTP