3.A lower triangular matrix is an nxn array in which has a[i][j] = = 0 if i

The open systems interconnection (osi) reference model: defines standards for many aspects of computing and communications within a network. is a generic description for how computers use multiple layers of protocol rules to communicate across a network. defines standards for wireless local area network (wlan) communication protocols. details the advantages and disadvantages of various basic network cabling options.

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What provides an array of buttons for quick access to commonly used commands and tools