New & Notable


SDN could supercharge network security

SN blogs: This week, an analyst says SDN could help secure the network; private cloud IaaS needs careful planning for success.


New breed of APM tools tackle hybrid cloud performance

Keeping tabs on application performance gets tougher in hybrid cloud situations. APM tools can help.


Extreme Networks warns of revenue slump for Q3

Extreme Networks' revenue for Q3 will be lower than the vendor previously expected. Currency value fluctuations and delayed purchasing from enterprises cited.

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How can limiting user behavior protect remote access?

Expert Julian Weinberger says limiting user VPN access can help enterprises enforce security and BYOD policies and reduce risk at the same time.

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Networking Basics

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    local area network (LAN)

    A local area network (LAN) is a group of computers and associated devices connected to a server using a shared common communications line or wireless link.

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    ICMP (Internet Control Message Protocol)

    ICMP (Internet Control Message Protocol) is an error-reporting and message-control protocol that network devices use to report problems in IP packet delivery.

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    optoisolator (optical coupler or optocoupler)

    An optoisolator (also optical coupler or optocoupler) is a component that uses light to transfer electrical signals between circuits to keep them electrically isolated from each other, preventing surges.

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