Networking Concepts Lesson 09 part 1 - Complex Networks - Eric Vanderburg

1. Chapter 9
Complex Networks
Networking Concepts – Eric Vanderburg ©2005

2. Multivendor Solutions
 Client
Based
Separate redirector for each vendor
 Clients ship with vendor’s redirector

 Server
Based
Gateway Services for Macintosh
 File & Print Services for Macintosh
 Gateway Services for UNIX
 Gateway Services for Netware (GSNW)

 Internet
utilities are essentially cross-platform
Networking Concepts – Eric
Vanderburg ©2005

3. Multivendor Solutions
 File
& Print Services – Taking windows
shares and making them look like shares
for another OS.
 Gateway – Making other OS shares look
like Windows shares.
Networking Concepts – Eric
Vanderburg ©2005

4. Macintosh
 Converts
file formats
 Emulates a Macintosh server
 LocalTalk & DOS requires AppleShare &
LocalTalk adapter
Networking Concepts – Eric
Vanderburg ©2005

5. Netware
 IPX/SPX
and client software needed
 Versions 5 and above use TCP/IP &
require the newer Novell client
(downloadable)
Networking Concepts – Eric
Vanderburg ©2005

6. UNIX
 DOS
clients need UNIX interface (Sun
uses PC-NFS)
 Samba
 NFS – NFS volumes mounted like
mapped drives (called a mount point)
Networking Concepts – Eric
Vanderburg ©2005

7. Concerns
 Permissions
 May
use single account for access
 Permissions may be incompatible
Networking Concepts – Eric
Vanderburg ©2005

8. Portables
 Palm
& Pocket PC
 Wireless connection or cable with periodic
sync
 Move from WEP to WPA (WiFi Protected
Access) / WPA2
Improved data encryption through the TKIP
(Temporal Key Integrity Protocol). TKIP scrambles
the keys using a hashing algorithm and, by adding
an integrity-checking feature, ensures that the keys
haven’t been tampered with.
 User authentication, which is generally missing in
WEP

Networking Concepts – Eric
Vanderburg ©2005

9. Terminal Services
 Massive
network traffic
Screens sent back and forth continuously
 Keystrokes generate traffic

 Cheap
clients – thin clients
 Expensive server (mainframe)
 Increased client security
 Remote Administration
 Windows, Citrix
 Good for mobile devices – Telxon
Networking Concepts – Eric
Vanderburg ©2005

10. Databases
 DBMS
(Database Management System)
 SQL *Sequel (Structured Query
Language)
 Front end – client
 Back end - server
Networking Concepts – Eric
Vanderburg ©2005

11. Requesting Data
1.
2.
3.
4.
5.
6.
User requests data
Client translates into SQL
SQL request sent to the server
Server processes the request
Results sent back to client software
Results presented to the user
Networking Concepts – Eric
Vanderburg ©2005

12. Terms
 WebDAV
(Web-based Distributed
Authoring & Versioning)
 ASP (Application Service Provider)
Networking Concepts – Eric
Vanderburg ©2005