Computer Networks Questions for Assignments

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15 Αυγ 2012 (πριν από 5 χρόνια και 2 μέρες)

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Welcome to CIS 235

Computer Networks

Fall, 2007


Prof Peterson


CIS 235: Networks Fall, 2007 Western State College

Homework

We’ll have two assignments this week:


Cleanup of the previous one


I have placed
comments in the wiki telling you what to do


A short programming task that will help you get
started on the real programming assignment
next week


Both are due next Monday (take Friday off!)


CIS 235: Networks Fall, 2007 Western State College

Cleaning up your Homework …

All of you need to be fleshing things out more


more details, not just 1 line for each fact,
references.

Some of you need to figure out how to capture the
necessary traffic!

If you have traffic in your
writeup
, explain how
you captured it.

Edit the traffic down to specific bits that illustrate
some aspect of your protocol.

CIS 235: Networks Fall, 2007 Western State College

The Next Test


We’ll do a chapter 2 test next Wednesday (24
th
).


The programming aspect of the chapter won’t be
covered on the test


just the homework.


Everything in the wiki from the homework is fair
game


look at what everyone has written!


As usual, 1 page of notes.

CIS 235: Networks Fall, 2007 Western State College

Programming


We’re going to be covering Java programming this
week.


There will be a small homework in the Wiki by
tomorrow


this is meant to get you back into Java
land. I’ll be using
NetBeans

in class. If you haven’t
used
NetBeans
, make sure you spend time asking
questions!


You will have a choice between an extended
programming project and a research paper + easy
programming project. I’ll be assigning you topics if
you choose the paper.

CIS 235: Networks Fall, 2007 Western State College

The World’s Biggest Database


What is load distribution?


What does
Akamai

do?


Why is DNS so hard?


What is a TLD? A TLD server?


What is an authoritative server?


What is a local server?


What is the difference between a recursive and
iterative query?



CIS 235: Networks Fall, 2007 Western State College

DNS Records


What are Resource Records?


What is a type “A” record for?


What is a type “NS” record for?


What is a type “CNAME” record for?


Why can a query carry more than one question?


What is “
nslookup
”?


Who manages the DNS database?

CIS 235: Networks Fall, 2007 Western State College

DNS Issues


What is the TTL used for?


How does DNS caching work?


How would you move a domain from one
computer to another?


How does you computer know where to get DNS
service?


What’s a
subdomain
?