Anna University Coimbatore 2009 B.E Electronics

repeated in the subnetwork address
· The bytes in the IP address that corresponds to 0 in the mask will change
to 0 in the subnetwork address
28. elaborate the rules of nonboundary-level masking?
· The bytes in the IP address that corresponds to 255 in the mask will be
repeated in the subnetwork address
· The bytes in the IP address that corresponds to 0 in the mask will change to
0 in the subnetwork address
· For other bytes, use the bit-wise AND operator
29. describe Gateway.
A device used to connect 2 separate networks that use various communication
protocols.
30. What is LSP?
In link state routing, a small packet containing routing info sent by a
router to all other router by a packet called link state packet.
UNIT IV
TRANSPORT LAYER
1. What is function of transport layer?
The protocol in the transport layer takes care in the delivery of data from
one application program on 1 device to an application program on a different
device. They act as a link ranging from the upper layer protocols and the services
given by the lower layer.
2. elaborate the duties of the transport layer?
The services given by the transport layer
End-to- end delivery
Addressing
Reliable delivery
Flow control
Multiplexing
3. What is the difference ranging from network layer delivery and the transport
layer delivery?
Network layer delivery Transport layer delivery
The network layer is responsible for
the the source-to-destination
delivery of packet
across multiple network links.
The transport layer is responsible for
source-to-destination delivery of the
entire message.
4. elaborate the 4 aspects related to the reliable delivery of data?
The 4 aspects are,
fault control
Sequence control
Loss control
Duplication control
5. What is meant by segment?
At the sending and receiving end of the transmission, TCP divides long
transmissions into smaller data units and packages every into a frame called a segment.
6. What is meant by segmentation?
When the size of the data unit received from the upper layer is too long for the
network layer datagram or data link layer frame to handle, the transport protocol
divides it into smaller usable blocks. The dividing process is called segmentation.
7. What is meant by Concatenation?
The size of the data unit belonging to single sessions are so small that several
can fit together into a single datagram or frame, the transport protocol combines them

Earning:   Approval pending.