Network Security 2 - Transport Layer Flashcards

1
Q

What protocol are used in transport layer ?

A

TCP & UDP

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2
Q

What is TCP ?

A

Transmission control protocol,

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3
Q

What is udp?

A

User datagram protocol
Connectionless protocol,
No flow control
no Congestion n control
Particularly used in streaming multimedia apps, DNS, snmp

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4
Q

What is SNMP ?

A

Simple Network Management Protocol how are you Babu Meri Lag Gaya Nishana simple network management protocol user datagram protocol

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5
Q

What does Flow Control do in TCP?

A
  1. Eliminates possibility of sender overflowing the receivers buffer .
  2. Controlled the rate at which data are exchanged
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6
Q

Which layer provides Flow control ?

A

The logical link control sublayer LLC provides flow control .

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7
Q

Where is TCP flow control defined ?

A

Defined in IEEE 802.2.

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8
Q

What is Receive buffer in TCP connection ?

A
  1. Every TCP connection has a receive buffer , data is sent to this location only from host .
  2. Bytes that are received in the correct sequence are stored in the receive buffer
  3. Data is read by the application from this offer
  4. Delay in reading this data lead to overflow of the buffer.
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9
Q

What is Receive window in TCP connection ?

A

Receive window is an variable which is maintained by Sender, it shows free buffer in space in receiver,
variable is rwnd = RcvBuffer - [LastByteRcvd - LastByteRead]

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10
Q

Define Flow Control ?

A

A sends large file to B over TCP
# B allocate receive buffer , RcvBuffer
The application reads from B’s buffer

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