Data communication and networking Practice Question and Answer
8 Q: In terms of Computer Networks, what does VPN stands for:
1223 063ac17eb5770eb565d5d95b9
63ac17eb5770eb565d5d95b9- 1vertical personal networkfalse
- 2Verbal Private Newsfalse
- 3virtual private newsfalse
- 4virtual Private Networktrue
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Answer : 4. "virtual Private Network "
Explanation :
A Virtual Private Network (VPN) is a technology that allows users to create a secure and encrypted connection to another network over the internet. VPNs are commonly used to ensure privacy and security when browsing the internet, especially when using public Wi-Fi networks. VPNs create a private tunnel for data transmission, protecting users' online activities from surveillance, censorship, and potential cyber threats.
Q: Which of the following is the most difficult and secure device that LAN uses?
1008 063e62e47cc37d41b3f99ce68
63e62e47cc37d41b3f99ce68- 1static routertrue
- 2IP Enabled Routerfalse
- 3dynamic routerfalse
- 4RIP enabled routerfalse
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Answer : 1. "static router"
Q: Which cobble is used to send modulated light?
1002 063ee06080fa4111f87e466e4
63ee06080fa4111f87e466e4- 1Category 3 UTPfalse
- 2Category 5 UTPfalse
- 3fibertrue
- 4coaxfalse
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Answer : 3. "fiber"
Explanation :
It seems there might be a confusion in your question. If you are referring to the technology used for transmitting data using modulated light, the term you are looking for is "fiber optic cable" or simply "fiber." Fiber optic cables are thin, flexible strands of glass or plastic that transmit data as modulated light pulses. They are widely used for high-speed data transmission over long distances due to their ability to carry large amounts of data with low attenuation and high bandwidth capabilities.
Q: Which of the following statements are true for firewalls?
1002 1640081f535d86258eccefcc8
640081f535d86258eccefcc8- 1filtering network trafficfalse
- 2hardware and software securityfalse
- 3follow the rulesfalse
- 4all of the abovetrue
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Answer : 4. "all of the above"
Q: Which components are used in LAN for Ethernet?
951 063edff5de6cd351b7500c59c
63edff5de6cd351b7500c59c- 1COAXfalse
- 2Fiberfalse
- 3STPfalse
- 4All of the abovetrue
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Answer : 4. "All of the above"
Explanation :
All three components—COAX (coaxial cables), Fiber (optical fiber cables), and STP (shielded twisted pair cables)—can be used in LANs for Ethernet connectivity, depending on specific network requirements and conditions. Different types of Ethernet cables, including coaxial, fiber optic, and shielded twisted pair, are used based on factors such as data transfer speed, distance, and susceptibility to electromagnetic interference.
Q: Which device is designed to send packets using package addresses?
892 063ee0676b0030e718d802957
63ee0676b0030e718d802957- 1Specialty Hubfalse
- 2switching hubtrue
- 3Port Hubfalse
- 4filtering hubfalse
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Answer : 2. "switching hub"
Explanation :
A switching hub, also known as a network switch, is designed to send packets using package addresses. A network switch operates at the data link layer of the OSI model and uses MAC addresses to forward data frames to specific devices within a local area network (LAN). Unlike a hub, which simply broadcasts data to all devices in the network, a switch intelligently forwards packets only to the device intended to receive the data, increasing network efficiency and reducing unnecessary network traffic.
Q: How many Pins are there in VGA Cable?
877 064942bfd13e8bde03235b582
64942bfd13e8bde03235b582- 111false
- 212false
- 317false
- 4None of thesetrue
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Answer : 4. "None of these"
Explanation :
1. There are two types of VGA cables: 14-pin and 15-pin. 14-pin cables will work in most applications, but wider display compatibility may require a 15-pin cable.
Q: Search engines perform the following tasks?
846 064b9139ee154aff53380df03
64b9139ee154aff53380df03- 1Web crawlingfalse
- 2Indexingfalse
- 3Searchingfalse
- 4All of the abovetrue
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Answer : 4. "All of the above "
Explanation :
The search engine performs the following tasks-
1. Web crawling: Search engines search all web pages on the web using a crawler. A crawler is a program that finds new web pages by following links on the web.
2. Indexing: Once the crawler finds all the web pages, the search engine indexes them in a database. The index contains information for each web page, such as title, URL, and content.
3. Searching: When a user types a search query, the search engine searches all the web pages in the index that may be related to the query.