The text shows how transport segments fit into internet packets which fit into link layer frames.
computer science
Description
Questions -
Chapter One (Core Network Concepts and Terminology).
Text: Panko,
Raymond R; Panko, Julia L. Business Data Networks and Security,
Eleventh Edition. Pearson Education Inc., New York, NY.
2019. ISBN: 978-0-13-481712-5
1) The
text shows how transport segments fit into internet packets which fit into link
layer frames. The Ethernet standard for example adds a frame header
and a frame trailer (see pg. 30). However, there is a physical layer
beneath the data link layer and different standards exist for different
media. These include copper wire or optical fiber as shown in
Figure 1-21 (pg. 27). Do different physical standards require
additional headers and/or trailers to be placed around a data link frame header
or trailer? Explain your answer.
2) For
the Domain Name System (DNS), what would happen if a malevolent system acted as
a DNS server and returned the IP address of a target system whenever the
address of a popular system (e.g. Facebook or the FIT web site) is requested?
3) Assume
you are operating within a single network (a "local area network" or
"LAN"). Is it possible to exchange information between
hosts without using internet "packets" and transport
"segments"? Explain your answer.
4) It
is noted (pg. 22) that the transport processes address packet sequencing
(ordering packets should they arrive out of order). Could this
function be handled by the internet processes instead? Why or why
not?
5) Is
it possible for the Transmission Control Protocol (TCP) or the User Datagram
Protocol (UDP) to operate with a different internet protocol than IP?
If so, what would be required? Why might one do this?
Hint: Consider the protocol stack.
