What happens if the sending NIC does not know the MAC address of the NIC that is to receive data?
What will be an ideal response?
If it doesn't already know the MAC address, a NIC may send a broadcast onto the network to ask for it. The MAC address of FF-FF-FF-FF-FF-FF is the Layer 2 broadcast address - if a NIC sends a frame using the broadcast address, every single NIC on the network will process that frame. That broadcast frame's data will contain a request for a system's MAC address. Without knowing the MAC address to begin with, the requesting computer will use an IP address to pick the target computer out of the crowd. The system with the MAC address the system is seeking will read the request in the broadcast frame and respond with its MAC address.
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What is the output of the following code segment that invokes calc():
Given the following function: ``` void calc (int a, int& b) { int c; c = a + 2; a = a * 3; b = c + a; } int x = 1; int y = 2; int z = 3; calc(x, y); cout << x << " " << y << " " << z << endl; ``` a. 1 2 3 b. 1 6 3 c. 3 6 3 d. 1 14 9 e. 2 3 4 5
Which of the following types of disaster recovery sites is a full-blown operational facility with power, cooling, and equipment racked and powered up, with network connectivity?
a. Cold site b. Warm site c. Hot site
The compiler error: “Cannot convert parameter 1 from ‘int(100)’ to ‘int’” means:
A. the array is out of bounds. B. the program can not link to the parameter portion of the compiler. C. the random number generator has a problem. D. the order of passing parameters is not correct.
Case WDX 2-1Stephen is creating a chart that displays the sales data for the past year. Stephen used the Insert Chart dialog box and an Excel worksheet opened with data in it. What should he do?
A. Close the worksheet without making any changes to the data B. Delete all the data in the worksheet and then close it C. Exit Word and start over D. Replace the sample data in the worksheet with his own data, then close it