3.4 Make a table similar to Figure 3.5
describing the work done by the software in each protocol layer when Internet
applications and the TCP/IP suite are implemented over an Ethernet.
Answer :
Layer
|
Description
|
Examples
|
Application
|
Protocols that are designed to
meet the communication requirements of
specific applications, often
defining the interface to a service. network
representation that is independent
of the representations used in individual
computers. Encryption is performed
in this layer.
|
HTTP, FTP,
SMTP,
CORBA IIOP,
Secure Sockets
Layer, CORBA
Data Rep
|
Transport
|
UDP: checksum validation, delivery
to process ports. TCP: segmentation, flow
control, acknowledgement and
reliable delivery.
|
TCP, UDP
|
Network
|
IP addresses translated to
Ethernet addresses (using ARP). IP packets
segmented into Ether packets.
|
IP
|
Data link
|
Ethernet CSMA CD mechanism
|
Ethernet MAC
|
layer
|
Physical Various Ethernet
transmission standards
|
Ethernet base-
band signalling
|