Networking Concepts Lesson 02 - Network Design Essentials - Eric Vanderburg

1. Chapter 2
Network Design Essentials
Networking Concepts – Eric Vanderburg ©2005

2. Topologies
 Bus
 Ring
 Star
 Ad-Hoc
(Wireless)
 Extended Star
 Mesh
 Star Bus
Networking Concepts – Eric
Vanderburg ©2005

3. Current Standard Layout
 Star
Topology
 Switches
 Twisted Pair wiring
Networking Concepts – Eric
Vanderburg ©2005

4. Equipment
 Repeater
 Hubs
Active (powered – regenerates signal)
 Passive (unpowered)

 Bridge
Source routing bridge – Token ring network has
mapped the frame course and it simply sends it on
its way
 Translation bridge – translates differing frame types
for different architectures (ATM, Ethernet)

Networking Concepts – Eric
Vanderburg ©2005

5. Equipment
 Switches
Cut-through switching – reads only the first part of
the frame to forward it.
 Store & forward switching

Reads entire frame before forwarding. Also does error
checking using the CRC field, discards if errors.
 Saves bandwidth because bad frames are not forwarded.
Requires faster switches
 Fragment free switching – reads enough to know it is not a
malformed or damaged frame

 Hybrids
(Hubs, Bridges, & Switches)
 Router
Networking Concepts – Eric
Vanderburg ©2005

6. Tables
 Bridging
Table
 Layer
2 table created on Bridges and
Switches of MAC addresses on each port
 Created dynamically or statically
 Routing
table
 Each
router creates its own and can receive
information about other routing tables from
other routers. Information received
depends on the protocol used.
Networking Concepts – Eric
Vanderburg ©2005

7. Network Diagrams
Networking Concepts – Eric
Vanderburg ©2005

8. Network Diagrams
Networking Concepts – Eric
Vanderburg ©2005

9. Book Corrections
 Star
Ring is not a topology
(Physical Star, Logical Ring)
Networking Concepts – Eric
Vanderburg ©2005

10. Book Corrections
 Star
Ring is not a topology
(Physical Star, Logical Ring)
Networking Concepts – Eric
Vanderburg ©2005