1.5 Network Topologies Protocols and Layers
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How are the nodes connected to one another in star topology?
All nodes indirectly connect to each other through one or more swithces
What type of topology do client-server models use?
Client-Server models
What are the advantages of a star topology?
If one node fails it doesn’t affect the other nodes Have high performance due to fewer data collisions New nodes can be quickly added
What are the disadvantages of a star network?
High maintainance Expensive The whole network fails if the switch fails as no node can communicate
How are nodes connected in a mesh network?
Connected to at least on other node through transmission media
What are the advantages of a Mesh Network?
Messages can be received quickly if the route is short Messages have different routes to go through New nodes can be added without interruption or interfering with other nodes
What are the disadvantages of a Mesh Network?
Many connections require high maintenance Impractical as there is a lot of cables and connections
What is a protocol?
Set of rules of how devices communicate and transmit data across a network
What are MAC Addresses?
Unique piece of identities that every device has
Why is IP Address used?
Used when sending data between networks They can be static or dynamic
What is the function of the TCP protocol?
Splits the data into packets and re-assembles Provides error-free transmission between 2 routers
What is the function of the IP protocol?
Does the Packet switching
What is the function of the HTTP protocol?
Used for accessing websites
What is the function of the HTTPS protocol?
Secure version of HTTP
What is the function of the FTP protocol?
Moves files between devices
What is the function of the POP3 protocol?
Retrieves email from the server Email is deleted on the server
What is the function of the IMAP protocol?
Retrieves email from the server Email is kept on the server
What is the function of the SMTP protocol?
Sends emails
What is the function of layers?
They group similar protocols together which have similar function
What is the 1st step of packet switching?
Data is split into packets and numbered in orders
What is the 2nd step of packet switching?
Each packet is sent down the fastest route
What is the 3rd step of packet switching?
Packet numbers are put into order
What is the 4th step of packet switching?
If packets are missing timeout message is sent
What is the 5th step of packet switching?
Confirmation message is sent