Internet – General
is a marvelous place to browse.
Here’s a promising link students can be sent to if questions
get asked that need some research:
Size of the Internet
graph reflects 1,134,634 IP addresses and 2,434,073 IP links (immediately
adjacent addresses in a traceroute-like path) of topology data gathered
from 25 monitors probing approximately 865,000 destinations spread across
76,000 (62% of the total) globally routable network prefixes.
Note the link
on above to an animated gif that shows expansion of network
Internet protocol references
a) Here’s a
“friendly” online network reference text:
http://www.freesoft.org/CIE/index.htm and links to
Here’s the ultimate technical reference:
too “techie” for most students and instructors, but here it
“RFC’s” (“Request for Comment”) are the
official reference documents for all internet protocols.
(OPTIONAL) Follow-Up Assignment and Activity
Handout #2 may be printed
and distributed as an assignment if a follow-up session is desired.
students into teams of 3-4 each.
As a preliminary step (skip if no session #2 planned), survey
class for off-campus Internet access and type of Operating
about 70% of students will have off-campus access and Windows. Instructor should ensure that
students with no off-campus Internet access are “seeded” into
teams so that (ideally) all teams will have at least one member with
off-campus access to the Internet to ensure some variety in connectivity
b. All students will perform research outside of
class – using home or computer lab to gather additional data. Follow directions in Activity
At Classroom Session #2
c. Teams collate results.
d. Teams summarize results: slowest connection, fastest; most
hops and speed, least hops and speed.
Where different, cite type of internet connection (e.g., cable
modem, DSL, dial-up).
e. Teams should prepare a written LAB REPORT of their findings to hand in.
follow lab activity to see if any connections or ISP services researched
appear on Internet Weather Report.
g. Demonstrate and discuss speed tests that students
were assigned in Activity Handout #2.
http://www.toast.net/performance/ ç easiest to use, note link
list of “fastest ISP’s” after test.
h. Discussion. Have class brainstorm factors that
affect connection speed. Some ideas that should arise:
Type of access
(i.e., bandwidth): cable, DSL, dial-up
ISP to internet backbone (# hops)
on net due to other traffic (varies with time)
router/server very busy
target computer + volume of other traffic
oral team presentations can be scheduled to review results and
conclusions. A key issue will
be the ability to provide visual aids: e.g., teams could actually prepare
their spreadsheet on lab computers with
consolidated results, and then use a classroom pc/projector to display for