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1.5 Network Topologies,protocols and
layers V2 Joshua Guerrero
- A Star network
- Each device is connected by an individual
cable directly to the server .They tend to be
more reliable and so are usually used in
schools and offices
- Each device is connected by an individual
cable directly to the server .They tend to be
more reliable and so are usually used in
schools and offices
- Ethernet
- Stable Connection
- Reduced possibility to be hacked
- Faster Trafic speed
- Generally will have good signal
- Stable Connection
- WIFI
- Benifits
- Cheap set-up costs
- More vulnerable to hacking
- The signal quality will reduce through walls or
obstructions
- Can connect multiple devices with no hardware
- Interface can occur
- May not able to receive signals
- Tends to have slow transfer speeds
- The connection is stable
- Cheap set-up costs
- Wireless Frequency
- Radio waves are used to transmit data
packets without the need for wires
- Radio waves are used to transmit data
packets without the need for wires
- Benifits
- Encryption
- Encryption is a method of
scrambling data with a key code
which makes no sense
- On an open or public WIFI network anyone can join and sniff out packets of data from other users.
- Therefore encryption is used .If intercepted the data will have no meaning
- Therefore encryption is used .If intercepted the data will have no meaning
- On an open or public WIFI network anyone can join and sniff out packets of data from other users.
- Encryption is a method of
scrambling data with a key code
which makes no sense
- Portocols
- IP
- Internet Protocol
- This is also known a IP address
- This is also known a IP address
- Internet Protocol
- HTTP = Hyper Text Transfer Protocol
- HTTP transmits data over the internet in a
unsecure format
- HTTP transmits data over the internet in a
unsecure format
- HTTPS = Hyper Text Transfer Protocol Secure
- HTTPS uses encryption so that any data
that is intercepted is meaningless.
- HTTPS uses encryption so that any data
that is intercepted is meaningless.
- POP
- Post office protocol
- Send and receive emails
- Send and receive emails
- Post office protocol
- A set of rules
- IMAP
- Used to retrieve emails
- Used to retrieve emails
- SMTP
- Used to send emails
- Used to send emails
- IP
- Packets
- A packet is the unit of data that is routed between an origin and
a destination on the Internet or any other packet-switched
network
- It is data put in individual packets
- The packet is sent and read
- Calculate checksum
- Once received it checks for missing packets
- If one is missing then it sends an error message
- Then it will reassemble and send the other packet .
- Then it will receive the data and there will be a confirmation message
- Then it will receive the data and there will be a confirmation message
- Then it will reassemble and send the other packet .
- If one is missing then it sends an error message
- Once received it checks for missing packets
- Calculate checksum
- The packet is sent and read
- Packets contain
- The Network souce
- The Network Destination
- Packet number
- Pay load
- The Network souce
- It is data put in individual packets
- A packet is the unit of data that is routed between an origin and
a destination on the Internet or any other packet-switched
network
- Network
- Mesh Network
- Where some or all workstations are directly
connected to the each other.Most are
connected to the node and they exchange the
data with
- Where some or all workstations are directly
connected to the each other.Most are
connected to the node and they exchange the
data with
- Mesh Network
- Layers
- Network communication components are standardised
- Different types of hardware and software are able to
communicate troubleshooting easier should and error
occour it changes are made to one layer it doesnt efffect
another olayer
- Different types of hardware and software are able to
communicate troubleshooting easier should and error
occour it changes are made to one layer it doesnt efffect
another olayer
- Network communication components are standardised
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