MCSE : Security Specialist
Ring
In a
ring topology network computers are connected by a single loop of
cable, the data signals travel around the loop in one direction,
passing through each computer. Ring topology is an active topology
because each computer repeats (boosts) the signal before passing it
on to the next computer.
One
method of transmitting data around a ring is called token passing.
The token is passed from computer to computer until it gets to a
computer that has data to send.
If there
is a line break, or if you are adding or removing a device anywhere
in the ring this will bring down the network. In an effort to
provide a solution to this problem, some network implementations
(such as FDDI) support the use of a double-ring. If the primary ring
breaks, or a device fails, the secondary ring can be used as a
backup.
Wireless
A
wireless network consists of wireless NICs and access points. NICs
come in different models including PC Card, ISA, PCI, etc. Access
points act as wireless hubs to link multiple wireless NICs into a
single subnet. Access points also have at least one fixed Ethernet
port to allow the wireless network to be bridged to a traditional
wired Ethernet network, such as the organization’s network
infrastructure. Wireless and wired devices can coexist on the same
network.
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