Which of the following layers of TCP/IP model is used to move packets between the Internet Layer
interfaces of two different hosts on the same link?

A.
Application layer

B.
Internet layer

C.
Link layer

D.
Transport Layer

Explanation:

The Link Layer of TCP/IP model is the networking scope of the local network connection to which
a host is attached. This is the lowest component layer of the Internet protocols, as TCP/IP is
designed to be hardware independent. As a result TCP/IP has been implemented on top of
virtually any hardware networking technology in existence. The Link Layer is used to move
packets between the Internet Layer interfaces of two different hosts on the same link. The
processes of transmitting and receiving packets on a given link can be controlled both in the
software device driver for the network card, as well as on firmware or specialized chipsets.
Answer option B is incorrect. The Internet Layer of the TCP/IP model solves the problem of
sending packets across one or more networks. Internetworking requires sending data from the
source network to the destination network. This process is called routing. IP can carry data for a
number of different upper layer protocols.
Answer option D is incorrect. The Transport Layer of TCP/IP model is responsible for end-to-end
message transfer capabilities independent of the underlying network, along with error control,
segmentation, flow control, congestion control, and application addressing (port numbers). End to
end message transmission or connecting applications at the transport layer can be categorized as
either connection-oriented, implemented in Transmission Control Protocol (TCP), or
connectionless, implemented in User Datagram Protocol (UDP).
Answer option is incorrect. The Application Layer of TCP/IP model refers to the higher-level
protocols used by most applications for network communication. Examples of application layer
protocols include the File Transfer Protocol (FTP) and the Simple Mail Transfer Protocol (SMTP).
Data coded according to application layer protocols are then encapsulated into one or more
transport layer protocols, which in turn use lower layer protocols to affect actual data transfer.