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ARZOO SOROUT
Assistant Professor (CSE)
Advanced Educational Institutionswww.advanced.edu.in
INTODUCTION
TO
TOPOLOGIES
Objectives
 Describe the basic and hybrid LAN physical
topologies, and their uses, advantages and
disadvantages
 Describe the backbone structures that form the
foundation for most LANs
www.advanced.edu.in
Topology
 The physical topology of a network refers to the
configuration of cables, computers and other
peripherals.
 The main types of network topologies are:
– Linear Bus
– Star
– Ring
– Tree or Hybrid
www.advanced.edu.in
Bus topology
 A bus topology consists of a main run of cable with a
terminator at each end. All servers workstations and
peripherals are connected to the linear cable
www.advanced.edu.in
Advantages of Bus Topology
 Works well for small networks
 Relatively inexpensive to implement
 Easy to add to it
www.advanced.edu.in
Disadvantages of Bus Topology
 Management costs can be high
 Potential for congestion with network traffic
www.advanced.edu.in
Star topology
 A star network is
designed with each
node (file server,
workstation,
peripheral) connected
directly to a central
network hub or server
www.advanced.edu.in
Advantages Star topology
 Good option for modern networks
 Low startup costs
 Easy to manage
 Offers opportunities for expansion
 Most popular topology in use; wide variety of
equipment available
www.advanced.edu.in
Disadvantages of Star topology
 Hub is a single point of failure
 Requires more cable than the bus
www.advanced.edu.in
Ring topology
 A ring network is one
where all workstations
and other devices are
connected in a
continuous loop. There
is no central server
www.advanced.edu.in
Advantages of Ring Topology
 Easier to manage; easier to locate a defective
node or cable problem
 Well-suited for transmitting signals over long
distances on a LAN
 Handles high-volume network traffic
 Enables reliable communication
www.advanced.edu.in
Disadvantages of Ring Topology
 Expensive
 Requires more cable and network
equipment at the start
 Not used as widely as bus topology
– Fewer equipment options
– Fewer options for expansion to high-speed
communication
www.advanced.edu.in
Tree or hybrid topology
 A tree or hybrid
topology combines
characteristics of linear
bus and star and/or
ring topologies.
 It consists of groups of
star-configured
workstations connected
to a linear bus
backbone cable
www.advanced.edu.in
www.advanced.edu.in
Network Operating Software
 Network operating systems co-
ordinate the activities of
multiple computers across a
network
 The two major types of
network OS are:
– Peer-to-peer
– Client/server
www.advanced.edu.in
Peer to peer network OS
– In peer to peer network OS, there is no
file server or central management source;
all computers are considered equal
– Peer to peer networks are design
primarily for small to medium LANS
– AppleShare and Windows for
Workgroups are examples of programs
that can function as peer to peer
www.advanced.edu.in
Client/Server network OS
– Client/server network OS
centralise functions and
applications in one or more
dedicated file servers.
– The file server provides access to
resources and provides security
– Novel Netware and Windows NT
Server are examples of
client/server network operating
systems
www.advanced.edu.in
www.advanced.edu.in
Arzoo Sorout
Assistant Professor( CSE)
Advanced Educational Institutions,
70 km Milestone,
Delhi-Mathura Road, Dist. Palwal,
Haryana-121105
+91–1275–398400, 302222
Email:- arzoo.sorout30@gmail.com
website:- www.advance.edu.in

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Topologies

  • 1. ARZOO SOROUT Assistant Professor (CSE) Advanced Educational Institutionswww.advanced.edu.in INTODUCTION TO TOPOLOGIES
  • 2. Objectives  Describe the basic and hybrid LAN physical topologies, and their uses, advantages and disadvantages  Describe the backbone structures that form the foundation for most LANs www.advanced.edu.in
  • 3. Topology  The physical topology of a network refers to the configuration of cables, computers and other peripherals.  The main types of network topologies are: – Linear Bus – Star – Ring – Tree or Hybrid www.advanced.edu.in
  • 4. Bus topology  A bus topology consists of a main run of cable with a terminator at each end. All servers workstations and peripherals are connected to the linear cable www.advanced.edu.in
  • 5. Advantages of Bus Topology  Works well for small networks  Relatively inexpensive to implement  Easy to add to it www.advanced.edu.in
  • 6. Disadvantages of Bus Topology  Management costs can be high  Potential for congestion with network traffic www.advanced.edu.in
  • 7. Star topology  A star network is designed with each node (file server, workstation, peripheral) connected directly to a central network hub or server www.advanced.edu.in
  • 8. Advantages Star topology  Good option for modern networks  Low startup costs  Easy to manage  Offers opportunities for expansion  Most popular topology in use; wide variety of equipment available www.advanced.edu.in
  • 9. Disadvantages of Star topology  Hub is a single point of failure  Requires more cable than the bus www.advanced.edu.in
  • 10. Ring topology  A ring network is one where all workstations and other devices are connected in a continuous loop. There is no central server www.advanced.edu.in
  • 11. Advantages of Ring Topology  Easier to manage; easier to locate a defective node or cable problem  Well-suited for transmitting signals over long distances on a LAN  Handles high-volume network traffic  Enables reliable communication www.advanced.edu.in
  • 12. Disadvantages of Ring Topology  Expensive  Requires more cable and network equipment at the start  Not used as widely as bus topology – Fewer equipment options – Fewer options for expansion to high-speed communication www.advanced.edu.in
  • 13. Tree or hybrid topology  A tree or hybrid topology combines characteristics of linear bus and star and/or ring topologies.  It consists of groups of star-configured workstations connected to a linear bus backbone cable www.advanced.edu.in
  • 15. Network Operating Software  Network operating systems co- ordinate the activities of multiple computers across a network  The two major types of network OS are: – Peer-to-peer – Client/server www.advanced.edu.in
  • 16. Peer to peer network OS – In peer to peer network OS, there is no file server or central management source; all computers are considered equal – Peer to peer networks are design primarily for small to medium LANS – AppleShare and Windows for Workgroups are examples of programs that can function as peer to peer www.advanced.edu.in
  • 17. Client/Server network OS – Client/server network OS centralise functions and applications in one or more dedicated file servers. – The file server provides access to resources and provides security – Novel Netware and Windows NT Server are examples of client/server network operating systems www.advanced.edu.in
  • 18. www.advanced.edu.in Arzoo Sorout Assistant Professor( CSE) Advanced Educational Institutions, 70 km Milestone, Delhi-Mathura Road, Dist. Palwal, Haryana-121105 +91–1275–398400, 302222 Email:- arzoo.sorout30@gmail.com website:- www.advance.edu.in