explain the advanced network typologies

1. Explain the
Advanced Network
Topologies

2. Q: Explain the AdvancedNetworkTopologies.
• There are mainly 2 Advanced network topology:
CDDI:
• CDDI stands for Copper Distributed Data Interface.
For a local area network (LAN), CDDI (Copper
Distributed Data Interface) is a standard for data
transmission based on FDDI that uses shielded
twisted-pair (STP) or unshielded twisted pair
(UTP) copper wire instead of fiber optic lines.

4. • CDDI supports a dual-ring capacity of 200 Mbps.
• CDDI's maximum distance is up to 200 meters, which is
much shorter than FDDI.
• CDDI is defined by the American National Standards
Committee X3-T9.5
• and conforms to the Open Systems Interconnection
(OSI) model of functional layering.
 CDDI is officially named the Twisted-Pair Physical
Medium Dependent (TP-PMD) standard
and is also referred to as Twisted Pair Distributed Data
Interface (TP-DDI).

5. 2)FDDI:
 FDDI stand for Fiber Distributed Data Interface.
 It is a set of ANSI (American National Standards
Institute) and ISO (International Organization for
Standardization ) standards for data transmission on
fiber optic lines in a local area network (LAN)
that can extend in range up to 200 km (124 miles).
• The FDDI protocol is based on the token ring protocol.

7. • In addition to being large geographically, an FDDI local
area network can support thousands of users.
• FDDI is frequently used on the backbone for a wide area
network (WAN).
• An FDDI network contains two token rings, one for
possible backup in case the primary ring fails. The
primary ring offers up to 100 Mbps capacity.
• If the secondary ring is not needed for backup, it can also
carry data, extending capacity to 200 Mbps.
• The single ring can extend the maximum distance; a dual
ring can extend 100 km (62 miles).

8. • It can be used to interconnect LANs using other
protocols.
• FDDI-II is a version of FDDI that adds the capability to
add circuit-switched service to the network so that
voice signals can also be handled.

9. Advantages:
• FDDI supports real-time allocation of network
bandwidth.
• (bandwidth is the maximum rate of data transfer
across a given path.)
• This allows you to use a wide array of different types
of traffic.
• FDDI has a dual ring that is fault-tolerant.
The benefit here is that if a station on the ring fails or if
the cable becomes damaged, the dual ring is automatically
doubled back onto itself into a single ring.

10. Disadvantages:
• The use of fiber optic cables is expensive.