Network Security 2 - Transport Layer Flashcards
What protocol are used in transport layer ?
TCP & UDP
What is TCP ?
Transmission control protocol,
What is udp?
User datagram protocol
Connectionless protocol,
No flow control
no Congestion n control
Particularly used in streaming multimedia apps, DNS, snmp
What is SNMP ?
Simple Network Management Protocol how are you Babu Meri Lag Gaya Nishana simple network management protocol user datagram protocol
What does Flow Control do in TCP?
- Eliminates possibility of sender overflowing the receivers buffer .
- Controlled the rate at which data are exchanged
Which layer provides Flow control ?
The logical link control sublayer LLC provides flow control .
Where is TCP flow control defined ?
Defined in IEEE 802.2.
What is Receive buffer in TCP connection ?
- Every TCP connection has a receive buffer , data is sent to this location only from host .
- Bytes that are received in the correct sequence are stored in the receive buffer
- Data is read by the application from this offer
- Delay in reading this data lead to overflow of the buffer.
What is Receive window in TCP connection ?
Receive window is an variable which is maintained by Sender, it shows free buffer in space in receiver,
variable is rwnd = RcvBuffer - [LastByteRcvd - LastByteRead]
Define Flow Control ?
A sends large file to B over TCP
# B allocate receive buffer , RcvBuffer
The application reads from B’s buffer