What is the name of a LAN device that provides many physical ports into which Ethernet cables can be connected?
A) Ethernet bridge
B) Ethernet router
C) Ethernet repeater
D) Ethernet switch
E) Ethernet concentrator
D
Explanation: D) On Ethernet networks, the most common device deployed is an Ethernet switch. This device is responsible for communications between the hosts that are connected to it (and to other connected switches); typically, these devices have anywhere from four to thousands of ports (RJ-45 ) available, depending on the environment.
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What is the output of the following code?
int numbers[5]; for (int i = 1; i < 5; i++) numbers[i - 1] = i + 1; for (int i = 0; i < 3; i++) cout << numbers[i];
I have an algorithm that runs in O(N 2 ), where n is the size of the problem. For N = 100, the time the algorithm runs is 1 minute. How long does the algorithm take for N=1000?
a) Same time b) 10 minutes c) 100 minutes d) 1000 minutes e) You haven’t given enough information. I can’t tell.
Opacity is the ________ value of a color.
a) red b) transparency c) dithering d) blue
When data is being prepared for transmission onto the network, it is broken into small pieces and a header and trailer are added to each piece to help identify it. What is this process called?
A. multitasking B. verification C. encapsulation D. application