Computer Networking
Packet Switch Stream (PSS) was introduced in

the UK in 1980
the US in 1961
None of these
None of these
the US in 1961 (&) the UK in 1981

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Computer Networking
What is the purpose of Spanning Tree Protocol in a switched LAN?

To prevent routing loops in networks with redundant paths
To provide a mechanism for network monitoring in switched environments
To manage the VLAN database across multiple switches
To create collision domains
To prevent switching loops in networks with redundant switched paths

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