Please keep at least one language enabled. || కనీసం ఒక భాషను ఎంచుకోండి.
Question 1
ప్రశ్న 1
What is the primary function of a Network Interface Card (NIC) in a computer?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A NIC provides the computer with an interface to a network.
• It participates in transmitting and receiving network data through the supported wired or wireless medium.
• Storage, application conversion and power supply are not primary NIC functions.
• It participates in transmitting and receiving network data through the supported wired or wireless medium.
• Storage, application conversion and power supply are not primary NIC functions.
వివరణ:
Question 2
ప్రశ్న 2
Which statement correctly describes a MAC address associated with an Ethernet network interface?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Ethernet uses MAC addresses as Layer 2 identifiers for network interfaces.
• Ethernet frames contain source and destination MAC address information for local network delivery.
• A MAC address is distinct from an IP address, which operates at the network layer.
• Ethernet frames contain source and destination MAC address information for local network delivery.
• A MAC address is distinct from an IP address, which operates at the network layer.
వివరణ:
Question 3
ప్రశ్న 3
A standard Ethernet MAC address is normally how long?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A standard Ethernet MAC address contains 48 bits.
• Forty-eight bits equal 6 bytes or octets.
• MAC addresses are commonly displayed as twelve hexadecimal digits divided into groups.
• Forty-eight bits equal 6 bytes or octets.
• MAC addresses are commonly displayed as twelve hexadecimal digits divided into groups.
వివరణ:
Question 4
ప్రశ్న 4
Which statement correctly describes a network-adapter device driver?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A device driver provides the software interface used by the operating system to control network-adapter hardware.
• The driver supports operations such as transmitting and receiving data through the adapter.
• It does not physically convert cable types or function as an Internet service provider.
• The driver supports operations such as transmitting and receiving data through the adapter.
• It does not physically convert cable types or function as an Internet service provider.
వివరణ:
Question 5
ప్రశ్న 5
What does the word 'modem' traditionally stand for?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Modem is derived from the terms modulator and demodulator.
• Modulation prepares information for transmission using an appropriate carrier signal.
• Demodulation performs the reverse process to recover the transmitted information.
• Modulation prepares information for transmission using an appropriate carrier signal.
• Demodulation performs the reverse process to recover the transmitted information.
వివరణ:
Question 6
ప్రశ్న 6
In a traditional dial-up telephone modem, what is the purpose of modulation and demodulation?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Traditional telephone modems were designed to carry computer data over voice-grade telephone channels.
• Modulation converts the information into a signal suitable for that transmission medium, while demodulation recovers it at the receiving side.
• IP assignment and Ethernet switching are separate networking functions.
• Modulation converts the information into a signal suitable for that transmission medium, while demodulation recovers it at the receiving side.
• IP assignment and Ethernet switching are separate networking functions.
వివరణ:
Question 7
ప్రశ్న 7
Which statement most accurately distinguishes a modem from a router in a typical Internet connection?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A modem or equivalent access device provides connectivity to the service provider's access network.
• A router forwards packets between different networks, such as a local network and the provider-facing connection.
• Some consumer gateway devices combine modem and router functions in one physical unit.
• A router forwards packets between different networks, such as a local network and the provider-facing connection.
• Some consumer gateway devices combine modem and router functions in one physical unit.
వివరణ:
Question 8
ప్రశ్న 8
Which connector is commonly associated with a standard copper Ethernet NIC in a desktop computer?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Copper Ethernet interfaces commonly use an RJ-45-style connector with twisted-pair Ethernet cabling.
• It provides the physical wired connection between the NIC and devices such as Ethernet switches.
• VGA, HDMI and audio connectors serve display or audio functions rather than Ethernet networking.
• It provides the physical wired connection between the NIC and devices such as Ethernet switches.
• VGA, HDMI and audio connectors serve display or audio functions rather than Ethernet networking.
వివరణ:
Question 9
ప్రశ్న 9
A desktop computer has an Ethernet NIC. Which task is performed by that interface during normal Ethernet communication?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The Ethernet interface handles transmission and reception of network data over its link.
• At the data-link level, Ethernet communication uses frames containing information such as source and destination MAC addresses.
• A NIC is not a storage expansion device or a power supply for the network switch.
• At the data-link level, Ethernet communication uses frames containing information such as source and destination MAC addresses.
• A NIC is not a storage expansion device or a power supply for the network switch.
వివరణ:
Question 10
ప్రశ్న 10
A network cable is connected correctly between a computer and a switch, but the operating system has no working driver for the computer's Ethernet adapter. What is the most likely result?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• The operating system requires appropriate driver support to control network-adapter hardware.
• A physically connected NIC may therefore remain unusable or operate incorrectly if the necessary driver is unavailable or malfunctioning.
• The cable and switch cannot replace the NIC's operating-system driver.
• A physically connected NIC may therefore remain unusable or operate incorrectly if the necessary driver is unavailable or malfunctioning.
• The cable and switch cannot replace the NIC's operating-system driver.
వివరణ:
Question 11
ప్రశ్న 11
Which hardware enables a laptop to communicate directly with a Wi-Fi network?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A wireless network adapter provides the laptop's interface to a Wi-Fi network.
• It transmits and receives network information using radio communication rather than an Ethernet cable.
• Sound, graphics and power adapters have different hardware functions.
• It transmits and receives network information using radio communication rather than an Ethernet cable.
• Sound, graphics and power adapters have different hardware functions.
వివరణ:
Question 12
ప్రశ్న 12
Which statement correctly distinguishes MAC addressing from IP addressing?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Ethernet MAC addresses operate at the data-link layer and identify network interfaces for local frame delivery.
• IP addresses operate at the network layer and are used for IP packet addressing and routing across networks.
• The two addressing systems serve different purposes and are not normally identical values.
• IP addresses operate at the network layer and are used for IP packet addressing and routing across networks.
• The two addressing systems serve different purposes and are not normally identical values.
వివరణ:
Question 13
ప్రశ్న 13
A broadband cable Internet service reaches a building through the cable television coaxial infrastructure. Which device is specifically designed to terminate this type of subscriber connection?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• A cable modem provides subscriber network access over cable television infrastructure.
• Cable broadband commonly uses DOCSIS technology to support data communication over the provider's coaxial cable network.
• An Ethernet patch panel or graphics adapter does not perform the cable-modem function.
• Cable broadband commonly uses DOCSIS technology to support data communication over the provider's coaxial cable network.
• An Ethernet patch panel or graphics adapter does not perform the cable-modem function.
వివరణ:
Question 14
ప్రశ్న 14
What does full-duplex operation of an Ethernet network interface mean?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Full-duplex communication allows transmission and reception to occur simultaneously.
• This differs from half-duplex communication, where both directions share the communication channel in a non-simultaneous manner.
• Duplex mode is a link characteristic and does not require two IP addresses per packet.
• This differs from half-duplex communication, where both directions share the communication channel in a non-simultaneous manner.
• Duplex mode is a link characteristic and does not require two IP addresses per packet.
వివరణ:
Question 15
ప్రశ్న 15
A customer receives an Internet connection through optical fiber directly to the premises. Which device is normally used to terminate the optical fiber service at the customer side rather than a traditional cable or dial-up modem?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Fiber-to-the-premises services commonly terminate at an Optical Network Terminal or ONT.
• The ONT converts the provider's optical access connection into a customer-side interface such as Ethernet.
• Although ONTs are sometimes informally called fiber modems, an ONT and a conventional cable or dial-up modem are technically different devices.
• The ONT converts the provider's optical access connection into a customer-side interface such as Ethernet.
• Although ONTs are sometimes informally called fiber modems, an ONT and a conventional cable or dial-up modem are technically different devices.
వివరణ:
Question 16
ప్రశ్న 16
A home Internet device contains both a DOCSIS cable-modem function and routing/Wi-Fi functions in the same enclosure. Which statement is correct?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Consumer gateways can integrate multiple networking functions into one physical unit.
• Such a unit may contain a cable modem together with routing, Ethernet switching and Wi-Fi access-point functions.
• Physical integration does not make the modem and router functions conceptually identical.
• Such a unit may contain a cable modem together with routing, Ethernet switching and Wi-Fi access-point functions.
• Physical integration does not make the modem and router functions conceptually identical.
వివరణ:
Question 17
ప్రశ్న 17
Consider the following statements about network interfaces and communication hardware:
1. A NIC provides a computer with an interface to a network.
2. Ethernet interfaces use MAC addresses for Layer 2 communication.
3. A router and a modem always perform exactly the same networking function.
4. A wireless network adapter can provide network connectivity without an Ethernet cable.
Which statements are correct?
1. A NIC provides a computer with an interface to a network.
2. Ethernet interfaces use MAC addresses for Layer 2 communication.
3. A router and a modem always perform exactly the same networking function.
4. A wireless network adapter can provide network connectivity without an Ethernet cable.
Which statements are correct?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Statements 1 and 2 correctly describe NIC functionality and Ethernet MAC addressing.
• Statement 3 is false because routing between networks and provider-access modulation or termination are distinct functions, even when integrated into one device.
• Statement 4 is correct because a wireless adapter communicates through a wireless medium rather than requiring a wired Ethernet connection.
• Statement 3 is false because routing between networks and provider-access modulation or termination are distinct functions, even when integrated into one device.
• Statement 4 is correct because a wireless adapter communicates through a wireless medium rather than requiring a wired Ethernet connection.
వివరణ:
Question 18
ప్రశ్న 18
Assertion (A): Changing the IPv4 address configured on an Ethernet interface does not, by itself, mean that the interface's underlying MAC address must also change.
Reason (R): IP addresses and MAC addresses operate at different networking layers and serve different addressing purposes.
Choose the correct answer.
Reason (R): IP addresses and MAC addresses operate at different networking layers and serve different addressing purposes.
Choose the correct answer.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• An IP address is a network-layer address assigned to an IP network connection.
• An Ethernet MAC address is a link-layer identifier associated with the Ethernet interface and can remain unchanged when the configured IP address changes.
• Both statements are true, and the different roles of the two address types correctly explain the Assertion.
• An Ethernet MAC address is a link-layer identifier associated with the Ethernet interface and can remain unchanged when the configured IP address changes.
• Both statements are true, and the different roles of the two address types correctly explain the Assertion.
వివరణ:
Question 19
ప్రశ్న 19
A computer has both a wired Ethernet adapter and a Wi-Fi adapter. Which statement is technically correct?
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• Ethernet and Wi-Fi adapters are separate network interfaces even when installed in the same computer.
• Each interface can have its own link-layer identity and network configuration.
• A system may use one or both interfaces depending on operating-system settings and available network connections.
• Each interface can have its own link-layer identity and network configuration.
• A system may use one or both interfaces depending on operating-system settings and available network connections.
వివరణ:
Question 20
ప్రశ్న 20
Match List I with List II:
List I
(a) NIC
(b) Modem
(c) MAC address
(d) Device driver
List II
1. Software that enables the operating system to control network-adapter hardware
2. Hardware interface enabling a computer to connect to a network
3. Link-layer identifier associated with a network interface
4. Device/function that modulates and demodulates signals for an appropriate communication service
Choose the correct matching code.
List I
(a) NIC
(b) Modem
(c) MAC address
(d) Device driver
List II
1. Software that enables the operating system to control network-adapter hardware
2. Hardware interface enabling a computer to connect to a network
3. Link-layer identifier associated with a network interface
4. Device/function that modulates and demodulates signals for an appropriate communication service
Choose the correct matching code.
Select an option first. || ముందుగా ఒక సమాధానాన్ని ఎంచుకోండి.
Explanation:
• NIC provides the network hardware interface, giving (a)-2.
• Modem corresponds to modulation and demodulation for the communication service, giving (b)-4.
• MAC address is the link-layer interface identifier, giving (c)-3, while the device driver allows the operating system to control the adapter, giving (d)-1.
• Modem corresponds to modulation and demodulation for the communication service, giving (b)-4.
• MAC address is the link-layer interface identifier, giving (c)-3, while the device driver allows the operating system to control the adapter, giving (d)-1.
వివరణ:
Answer Key సమాధానాల పట్టిక
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Question 1 ప్రశ్న 1Answer: C. To provide the hardware interface through which the computer can send and receive data over a network సమాధానం: C.
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Question 2 ప్రశ్న 2Answer: A. It is a link-layer identifier associated with the network interface. సమాధానం: A.
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Question 3 ప్రశ్న 3Answer: D. 48 bits సమాధానం: D.
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Question 4 ప్రశ్న 4Answer: B. It enables the operating system to control and communicate with the network-adapter hardware. సమాధానం: B.
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Question 5 ప్రశ్న 5Answer: A. Modulator-Demodulator సమాధానం: A.
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Question 6 ప్రశ్న 6Answer: C. To convert computer data into signals suitable for transmission over the telephone channel and recover the data from received signals సమాధానం: C.
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Question 7 ప్రశ్న 7Answer: B. A modem provides the provider-facing access connection, while a router forwards traffic between networks and can share that connection with local devices. సమాధానం: B.
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Question 8 ప్రశ్న 8Answer: D. RJ-45 సమాధానం: D.
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Question 9 ప్రశ్న 9Answer: C. Increasing the physical storage capacity of the computer సమాధానం: C.
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Question 10 ప్రశ్న 10Answer: B. The switch becomes the computer's network adapter. సమాధానం: B.
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Question 11 ప్రశ్న 11Answer: A. Wireless network adapter సమాధానం: A.
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Question 12 ప్రశ్న 12Answer: D. MAC addresses are used only for website names, while IP addresses identify files. సమాధానం: D.
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Question 13 ప్రశ్న 13Answer: B. Cable modem సమాధానం: B.
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Question 14 ప్రశ్న 14Answer: C. The interface can transmit and receive data simultaneously on the link. సమాధానం: C.
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Question 15 ప్రశ్న 15Answer: D. Optical Network Terminal (ONT) సమాధానం: D.
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Question 16 ప్రశ్న 16Answer: A. One physical gateway device can combine modem and router functions. సమాధానం: A.
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Question 17 ప్రశ్న 17Answer: C. 1, 2 and 4 only సమాధానం: C.
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Question 18 ప్రశ్న 18Answer: B. Both Assertion and Reason are true, and Reason is the correct explanation of Assertion. సమాధానం: B.
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Question 19 ప్రశ్న 19Answer: A. They represent separate network interfaces and can have distinct MAC addresses and network configurations. సమాధానం: A.
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Question 20 ప్రశ్న 20Answer: D. (a)-2, (b)-4, (c)-3, (d)-1 సమాధానం: D.