Up: Assignments
Systems Administration -- Final Examination
Due Date: Tuesday May 13, 1997 at 10:30pm
The midterm can be submitted by e-mail by midnight on Tuesday
May 13, 1997.
- Given an IP number of a destination at a remote site, explain
in detail the sequence of operations that are performed in Unix
to deliver a packet to that destination. Mention routing, default
routes, ethernet encapsulation etc etc. Detail the software used
and the files or servers accessed?
-
Explain in detail the sequence of events which occur when an
X-term or diskless workstation boots?
-
Explain the difference between DNS domains and IP addresses.
How are each allocated administratively and in terms of what
(hierarchical) structure? How is the mapping between them done?
-
Using traceroute to determine routes,
whois -h RS.INTERNIC.NET domainname to determine actual addresses,
and any other utilities you wish, determine
the network connectivity between Kent State University, the Ohio
Academic Research Network (OARnet) and sites outside Ohio, both inside
and outside the US. In particular, include uakron.edu, csuohio.edu,
osc.edu, uc.edu, utexas.edu, nyu.edu, stanford.edu,
csu.edu, utoronto.ca, tcd.ie, papp.undp.org, cwi.nl
Hint: You can be reasonably sure all these sites have WWW machines,
so try traceroute www.uakron.edu etc.
-
Explain in detail the sequence of operations performed when a user
at MCS in Kent sends mail to
pfarrell@maths.tcd.ie
- Include information on all nameserver lookups etc.
- What machine(s) is the mail delivered to ?
What happens if the machine is down? What happens if the domain is
unreachable?
- How is this information obtained?
- What is the nameserver for the domain in question?
What happens if the nameserver is down? What happens if it has been
down for more than a week?
-
What are the effects of the following lines in a sendmail.cf file?
- Ox30
- OX99
- OT5d/1d
- Do.:%@!^=/[]|