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Network Security Practice Test: Communication Networks Basics
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Communication Networks topics include: Network hardware and topologies, layers and TCP/IP and OSI reference models. Network topology is the arrangement of devices in a computer network, including their physical and logical placement. It describes how devices are connected and how they interact with each other.  Network topology can have a significant impact on a network's performance, security, maintenance, management, and scalability. It can also determine how data is transferred between devices, which affects a network's speed, reliability, and security.  Network topology can be physical... Show more
Network Security Practice Test: Communication Networks Basics
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25 Questions

1. Which network topology does this represent?
2. A device that helps prevent congestion and data collisions –
3. A channel has a 1-MHz bandwidth. The SNR for this channel is 63. What is the appropriate signel level?
4. IEEE 802.8 is/was –
5. What is the function of Network Interface Cards?
6. If a periodic signal is decomposed into five sine waves with frequencies of 100, 300, 500, 700, and 900 Hz, what is its bandwidth?
7. Calculate the theoretical highest bit rate of a regular telephone line. The signal-to-noise ratio is usually 3162.
8. A list of protocols used is known as –
9. In collision free protocol channel efficiency is given by-
10. Which of these is a connection oriented service?
11. A channel has a 1-MHz bandwidth. The SNR for this channel is 63. What is the appropriate bit rate?
12. A slotted ALOHA network transmits 200-bit frames using a shared channel with a 200-kbps bandwidth. Find the throughput if the system (all stations together) produces 500 frames per second.
13. UDP stands for ________
14. Which topology requires the most amount of wiring?
15. Calculate the theoretical channel capacity. If SNR(dB) = 36 and the channel bandwidth is 2 MHz.
16. HTTP stands for ________
17. Which one of these does not lie in the Link Layer of the TCP/IP Model?
18. After performing bit stuffing on the following stream : 01101111111111111110010, the output is-
19. ICMP stands for ________
20. 10010100101 is the code received. Find the error bit.
21. A pure ALOHA network transmits 200-bit frames on a shared channel of 200 kbps. What is the requirement to make this frame collision-free?
22. The channel capacity is 100Mbps, the frame length is 10000 bits and the arrival rate is 5000 frames/sec. Calculate the mean time delay.
23. Assume we need to download text documents at the rate of 100 pages per second. What is the required bit rate of the channel?
24. A device which is used to boost the signal between two cable segments or wireless access points is
25. A device that is used to connect a number of LANs is –