protocols Flashcards
What is ethernet?
A standard for networking technology
Why would you use ethernet?
It is reliable, error-free and fast
Disadvantages of ethernet
Requires lots of cables and hardware. Can be expensive
Benefits of Wi-Fi
Cheap
Easy to set up
Can handle lots of users
Convenient as it is wireless
Disadvantages of Wi-Fi
Network speeds slower than wired networks
Relies on signal strength to WAP
Less secure than a wired connection
Define MAC address
A unique identifier for networks
When is MAC address used?
For communication on the same network
How is a MAC address shown?
As 6 bytes written in Hex
Define IP address
An identifier for communication between different networks
How is an IP address shown?
As 4 bytes written in denary
Why is encryption used?
So wireless networks can securely transmit data
How is data encrypted?
It is scrambled into ciphertext using a master key created from network’s SSID and password
What is a protocol?
A set of rules for how computers should communicate?
What is network protocol?
It defines rules and standards for data transmission
What protocol sends data between different networks?
TCP/IP
What protocol is used by web browsers to transmit data?
HTTP
What protocol is used by web browsers to securely transmit data?
HTTPS
What protocols accesses and moves files?
FTP
What protocol downloads email to user and deletes it from server?
POP
What protocol keeps emails on the server and can be accessed from any authorised device?
IMAP
What protocol sends emails?
SMTP
How are network protocols divided?
In layers
What is a layer?
A group of protocols with a similiar function
Benefits of layers
each layer is self-contained so can be developed independently
