What is router? Explain components of routers.


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What is the Domain Name System (DNS)? What are the advantages of it?

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how to navigate between screens in an app? : Blackberry tablet os

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Can we distribute applications that use cryptographic APIs?

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Explain the use of RTP and RTCP protocols (Real-Time Transfer Control Protocols). 

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Suppose I am trying to sign in to my blackberry internet service account, but I am getting this error message: “the user id and password provided are invalid. Please re-enter your user id and password and try again.” What should I do?

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Which OS versions does BlackBerry App World support?

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Explain the wireless internet advantages of blackberry technology?

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Where should we save our app data to on the Playbook?

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