New PowerPoint and Homework
files are available for students at the companion
website
New PowerPoint and Answer
Key files are available for instructors at the instructor resource website
The PowerPoint presentations
have been considerably revised for all chapters. In the following cases, new
information has been added.
Slide 2-51 notes that when
application messages are long, they are fragmented at the transport layer for TCP
so that TCP segments are small enough to fit into packets.
Slide 3-21 clarifies that
while bits are turned into signals at the physical layer, the binary encoding
of application information is done at the application layer
Slide 3-58 gives more
information about shielded twisted pair (STP) wiring
Slide 5-55 notes that WPA
has now been partially cracked. Specifically, the Temporal Key Integrity
Protocol, which WPA uses for rekeying, now has a known crack. Many firms are
now accelerating their evolution toward 802.11i (WPA2) as a consequence.
Since the book went to
press, “cloud computing” has become a popular topic.
In cloud computing, a cloud service provider provides both computing power and
applications to customers. The term “cloud” means that the service provider
handles all of the details, including server and application software
operation, so customer computers only need browsers for service. A series of
slides after the chapter’s main slide discuss cloud computing.