Protocols, Standards and Services Flashcards
Wha two protocols does the transport layer utilise?
TCP for communication that requires reliable transport.
UDP forcommunication that can tolerate some data loss.
Do some application layer protocols use only UDP?
Yes.
Do some application layer protocols use both TCP and UDP?
Yes.
They use them for different operations, depending on the purpose of the traffic.
Do some application layer protocols use neither TCP or UDP?
Application layer protcols in the TCP/IP suite use either TCP or UDP.
At minimum the data must be segmented for transmission.
What are the four layers of the TCP model?
Application.
Transport.
Internet.
Network Access.
What are the protocols of the application layer?
FTP. HTTP. SMS. DNS. TFTP.
What are the protocols of the transport layer?
TCP.
UDP.
What are the protocols of the internet layer?
IP.
What are the protocols of the network access layer?
LAN connections.
WAN connections.
Ethernet standards.
802.11 standards.
What is TCP responsible for? What is IP responsible for?
TCP is responsible for tracking all network connections between the users device and multiple destinations.
IP is responsible for adding addressing so that information can be routed to the correct destination.
What are the features of TCP?
Reliable.
Acknowledges data.
Resends lost data.
Delivers data in sequenced order.
What are the features of UDP?
Dast. Low overhead. Does not require acknowledgements. Does not resend lost data. Delivers data as it arrives.
What protocols is TCP useful for?
SMTP/POP (Email).
HTTP.
What protocols is UDP useful for?
IP Telephony.
Streaming live video.
What is a best effort delivery protocol? Give an example of it?
Bets effort delivery is unreliable as there is no acknowledgement that the data is recieevd at the destination.
UDP is an example of it.
