References used
ATM
http://www.protocols.com/pbook/atmsar.htm
http://www.npac.syr.edu/users/mahesh/homepage/atm_tutorial/node25.html
http://www.cisco.com/warp/public/614/12.html
http://www.techweb.com/encyclopedia/defineterm?term=internet2&x=11&y=7
http://cc.uoregon.edu/cnews/backissues/i2_glossary.html
http://www.cisco.com/warp/public/614/12.html
http://cell-relay.indiana.edu/cell-relay/FAQ/ATM-Acronyms.html
http://www.protocols.com/pbook/atmsig.htm
DSL and Frame Relay
http://www.howstuffworks.com/dsl.htm
http://www.dslforum.org/about_dsl.htm?page=aboutdsl/dsl_intro.html
http://www.dslforum.org/about_dsl.htm?page=aboutdsl/dsl_intro.html
http://www.frforum.com/basicguide/chap2.html
http://www.arcelect.com//Frame_Relay-56kbps_FT1-T1.htm
http://www.etinc.com/index.php?page=frfaq.htm
http://www.frforum.com/basicguide/toc.html
Edge router/backbone router
http://content.techweb.com/encyclopedia/defineterm?term=EDGEROUTER&exact=1
Protocol Interactions
http://psyber.letifer.org/downloads/priv/protpost.pdf
X.25 Protocols
http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/x25.htm
http://www.sangoma.com/x25.htm http://www.radcom-inc.com/radcom/test/x25.htm
www.cid.alcatel.com/doctypes/techprimer/x25/index.jhtml
www2.inow.com/frame_relay/x25.html
www.itu.int/rec/recommendation.asp?type=products&parent=T-REC-x
http://www.protocols.com/pbook/x25.htm
http://www.itu.int/rec/recommendation.asp?type=products&parent=T-REC-x
Firewall
http://www.ibiblio.org/mdw/HOWTO/Firewall-HOWTO.html#toc5
http://www.howstuffworks.com/firewall.htm
http://www.interhack.net/pubs/fwfaq/#SECTION00030000000000000000
http://grc.com/su-firewalls.htm
http://www.firewall-software.com/firewall_faqs/what_is_a_firewall.html
Security Models
http://www.ececs.uc.edu/~iouaiss/web_prog/misc/security/I_a.htm