Answer / kamal rawat

HUB IS DISTRIBUTED STATION BUT SWITCH IS CHANGEABLE STATION

Answer / rahul saha

hub can be controlled through program and setting
instructions but not generally manual,

switch are generally mechanically / electrically controlled
device.

Answer / sunil kumar

Hub is non managable & switches are managable.

Answer / samrat kar

A hub is a unsophisticated broadcast device. Any packet
entering any port is broadcast out on every port and thus
hubs do not manage any of the traffic. Since every packet is
constantly being sent out through every port, chances of
data collision is more and thus it impedes the smooth flow
of traffic.
A switch isolates ports, meaning the every received packet
is sent out only to the port on which the target may be
found. If proper port is not found, then it will broadcast
the packet to all ports. So using switch network performance
can be greatly increased.

Answer / parmar.ic@gmail,com

hub is basically multiport repeater. They till several
devieces together onto a common connection in essentially a
bus connection.
switche is basically a multiported bridge that can operate
dedicated channels between two distinct station . They are
operate by sorting data packets and sending them to a
specific address.

Answer / keval

hub is used in physical layer while switch are used in data
link layer.

Calculate the maximum pressure drop that can be allowed to occur across a control valve, so that we can prevent cavitation / flashing from occurring. Use the following formula: Δ P allow = Km (P1 – PvapourA) where, Δ P allow - the maximum allowable differential pressure for sizing purposes, or terminal pressure drop; Km- the valve recovery coefficient from the manufacturer’s catalogue; P1 - absolute inlet fluid pressure; PvapourA - absolute fluid vapour pressure at the inlet temperature; Use Atmospheric pressure = 101.3 kPa, P1 = 1200 kPa(g), PvapourA = 4 kPa, KM = 0.72

0 Answers  

i feel sq. pipe is better than round pipe pls give comment for this. advance thanks for reply

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if differential pressure created by orifice falls below vapour pressure of liquid flowing through it what will happen

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Displace type LT to be calibrated in workshop, wt. 40, dia- 60 mm, density- 0.8kg/cm3.

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principle of automatic votage regulator

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Sir, I want junior executive, Instrumentation question papaer for IOCL, Plz send to arabinda.ghosh83@gmail.com

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why I need valve guard and whats different between guard and positioner ??

0 Answers  

How to Calibrate Level Switch in field

0 Answers  

What is the use of the shield wire and how is the connection at both the ends of a shield wire?

2 Answers   Samsung,