Managed switches can support
QoS for real-time network
applications such as video
conferencing, IP phone,
and so on by having the
administrator designate the
priority of data transmission
according to the type of
data transmission. In a network
built with a common
switch, data cannot be adapted
to special network applications
such as multimedia, and must
be transmitted in order
regardless of the type. X

Compared with ordinary
switches that do not
have network security features,
managed switches perform
better in securing data
storage and access, using
various methods such as VLANs,
PVLANs and ACLs to isolate
the networks of different
departments and deny access
to sensitive data by certain users.
In addition, with the help of access lists,
it can also effectively stop
the spread of worm-type
viruses and restrict access
rights of certain
users to further protect
network security. X

With technologies such
as Spanning Tree and
EtherChannel, managed switches
can redundantly
build links and also multiply
the connection bandwidth
between devices
(between switches, between switches and routers,
between switches and servers),
while achieving network
load balancing to ensure
network stability.
If a redundant network is built
on a normal switch,
the network may be paralyzed
due to the presence of
topology rings. Without a
redundant network,
a part of the network,
or even the entire network,
may be disrupted when a line,
device, or module is
damaged. X