IT Essentials 5.0 Chapter 6
- 1.
Which network device makes forwarding decisions based on the destination MAC address that is contained in the frame?
- A.
Repeater
- B.
Hub
- C.
Switch
- D.
Router
Correct Answer
C. SwitchExplanation
A switch is a network device that makes forwarding decisions based on the destination MAC address that is contained in the frame. It examines the MAC address of the incoming frame and determines which port to forward the frame to, based on its destination MAC address. This allows the switch to efficiently send the frame only to the intended recipient, rather than broadcasting it to all connected devices like a hub or repeater would do. A router, on the other hand, makes forwarding decisions based on the destination IP address, not the MAC address.Rate this question:
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- 2.
A customer is considering a multipurpose device to create a home network. Which three devices are usually integrated into a multipurpose network device? (Choose three.)
- A.
Email server
- B.
Router
- C.
Switch
- D.
Web server
- E.
Wireless access point
- F.
Print server
Correct Answer(s)
B. Router
C. Switch
E. Wireless access pointExplanation
A multipurpose network device is designed to serve multiple functions within a home network. A router is essential as it connects multiple devices to the internet and directs traffic between them. A switch is used to connect devices within the network and facilitate communication between them. A wireless access point allows wireless devices to connect to the network. Therefore, the correct answer is router, switch, and wireless access point.Rate this question:
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- 3.
Which technology would be recommended for a business that requires workers to access the Internet while visiting customers at many different locations?
- A.
ADSL
- B.
VPN
- C.
Cellular
- D.
ISDN
Correct Answer
C. CellularExplanation
Cellular technology would be recommended for a business that requires workers to access the Internet while visiting customers at many different locations. Cellular networks provide wireless connectivity using mobile devices, allowing workers to access the Internet on the go. This technology is ideal for businesses with employees who frequently travel or work remotely, as it provides reliable and convenient Internet access regardless of the location. Additionally, cellular networks offer wide coverage and high-speed data connections, making it a suitable choice for businesses that require constant connectivity while on the move.Rate this question:
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- 4.
When is a dial-up connection used to connect to an Internet provider?
- A.
When a high-speed connection is provided over a cable TV network
- B.
When a digital connection is provided using ISDN
- C.
When a regular telephone line is used
- D.
When a cellular telephone provides the service
Correct Answer
C. When a regular telephone line is usedExplanation
A dial-up connection is used to connect to an Internet provider when a regular telephone line is used. This is because dial-up connections rely on the traditional telephone network to establish a connection. When a user wants to connect to the internet, they use their computer modem to dial a specific phone number provided by their internet service provider (ISP). The modem then establishes a connection through the telephone line, allowing the user to access the internet. However, dial-up connections are significantly slower compared to high-speed connections provided over cable TV networks or digital connections using ISDN.Rate this question:
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- 5.
Which type of connection to the Internet is capable of the fastest transfer rates?
- A.
ISDN BRI
- B.
Dial-up
- C.
ISDN PRI
- D.
Cable
Correct Answer
D. CableExplanation
Cable internet connection is capable of the fastest transfer rates compared to the other options mentioned. Cable internet uses coaxial cables to transmit data, allowing for higher bandwidth and faster speeds. On the other hand, ISDN BRI and PRI are digital telephone services that offer slower transfer rates. Dial-up, although widely used in the past, is an outdated technology that provides slow internet speeds. Therefore, cable internet is the correct answer as it provides the fastest transfer rates.Rate this question:
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- 6.
Which statement describes the logical topology for a LAN?
- A.
It describes how computers access the LAN medium.
- B.
It depicts the locations of main routers and switches in a LAN.
- C.
It lists the number of computers, routers, and switches on the LAN.
- D.
It defines how computers connect to a LAN.
Correct Answer
A. It describes how computers access the LAN medium.Explanation
The logical topology for a LAN refers to the way in which computers access the LAN medium. It outlines the method by which data is transmitted between devices on the network, such as through a bus, ring, or star configuration. This description does not involve the physical locations of routers and switches, the number of devices on the network, or the specific way in which computers connect to the LAN.Rate this question:
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- 7.
ABC Company requires preventive maintenance for all local network cabling once a year. Which task should be included in the preventive maintenance program?
- A.
Replace all labeling on the cables.
- B.
Replace all cable supports to prevent loose attachment points.
- C.
Disconnect and reconnect all patch cables.
- D.
Inspect all patch cables for breaks.
Correct Answer
D. Inspect all patch cables for breaks.Explanation
In order to ensure the smooth functioning of the local network cabling, it is important to include the task of inspecting all patch cables for breaks in the preventive maintenance program. This is because patch cables are prone to wear and tear over time, which can lead to breaks or faults in the cables. By inspecting them regularly, any potential issues can be identified and addressed promptly, preventing any disruptions or downtime in the network.Rate this question:
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- 8.
What is an example of network maintenance?
- A.
Immediately turning off a network device if the network device is making an unusual sound
- B.
Educating users on IT policies and procedures
- C.
Using cable supports to identify the devices to which the cables are connected
- D.
Not doing preventive maintenance regularly if the maintenance interrupts network activity
Correct Answer
B. Educating users on IT policies and proceduresExplanation
Educating users on IT policies and procedures is an example of network maintenance because it helps ensure that users understand and follow the guidelines and protocols necessary for the smooth operation and security of the network. By providing training and information on IT policies, users can learn how to use network resources effectively, avoid potential security breaches, and troubleshoot common issues. This proactive approach to network maintenance helps minimize user errors and promotes a more efficient and secure network environment.Rate this question:
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- 9.
A technician is troubleshooting a problem where the user claims access to the Internet is not working, but there was access to the Internet the day before. Upon investigation, the technician determines that the user cannot access the network printer in the office either. The network printer is on the same network as the computer. The computer has 169.254.100.88 assigned as an IP address. What is the most likely problem?
- A.
The router that connects this network to other networks is down.
- B.
The network interface card driver needs to be updated.
- C.
The IP default gateway on the computer is incorrect.
- D.
The computer cannot communicate with a DHCP server.
Correct Answer
D. The computer cannot communicate with a DHCP server.Explanation
The most likely problem is that the computer cannot communicate with a DHCP server. This is indicated by the fact that the computer has a 169.254.100.88 IP address, which is in the range of automatic private IP addresses. This suggests that the computer was not able to obtain a valid IP address from a DHCP server. Since the network printer is also on the same network and cannot be accessed, it further supports the idea that there is an issue with the DHCP server.Rate this question:
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- 10.
Which technology is most often used to connect devices to a PAN?
- A.
Bluetooth
- B.
IEEE 802.11n wireless
- C.
Fiber optic cabling
- D.
Coaxial cabling
Correct Answer
A. BluetoothExplanation
Bluetooth is the most often used technology to connect devices to a Personal Area Network (PAN). Bluetooth is a wireless technology that allows for short-range communication between devices. It is commonly used for connecting devices such as smartphones, tablets, laptops, and peripherals like keyboards, mice, and headphones. Bluetooth provides a convenient and reliable way to establish a PAN, allowing devices to communicate and share data wirelessly over short distances.Rate this question:
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- 11.
Which three layers of the OSI model map to the application layer of the TCP/IP model? (Choose three.)
- A.
Data link
- B.
Application
- C.
Network
- D.
Transport
- E.
Physical
- F.
Session
- G.
Presentation
Correct Answer(s)
B. Application
F. Session
G. PresentationExplanation
The three layers of the OSI model that map to the application layer of the TCP/IP model are application, session, and presentation. The application layer in both models is responsible for providing services and interfaces for applications to communicate with the network. The session layer manages and establishes connections between applications, while the presentation layer handles data formatting and encryption. These three layers work together to ensure that data is properly transmitted and understood between applications.Rate this question:
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- 12.
A device has an IPv6 address listed as 2001:0DB8:75a3:0214:0607:1234:aa10:ba01. What is the interface ID of the device?
- A.
Ba01
- B.
0607:1234:aa10:ba01
- C.
2001:0DB8:75a3
- D.
2001:0DB8
Correct Answer
B. 0607:1234:aa10:ba01Explanation
The interface ID of the device is 0607:1234:aa10:ba01. This is because the IPv6 address is made up of two parts - the network prefix and the interface ID. The network prefix is 2001:0DB8:75a3:0214 and the interface ID is 0607:1234:aa10:ba01. The interface ID uniquely identifies the device on the network.Rate this question:
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- 13.
What is a characteristic of the UDP protocol?
- A.
Low overhead
- B.
Error correction
- C.
Guaranteed delivery
- D.
End-to-end establishment before delivery
Correct Answer
A. Low overheadExplanation
The characteristic of the UDP protocol is low overhead. UDP (User Datagram Protocol) is a connectionless protocol that provides a lightweight and efficient method of transmitting data over the network. It does not include error correction, guaranteed delivery, or end-to-end establishment before delivery, making it faster and less resource-intensive compared to other protocols like TCP. Its low overhead makes it suitable for applications that prioritize speed and real-time data transmission over reliability.Rate this question:
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- 14.
What would be a disadvantage of configuring a wireless router or access point to operate only in accordance with the 802.11g protocol standard?
- A.
802.11a wireless devices will not be able to connect to the wireless network.
- B.
The 802.11g standard does not support static IP addressing.
- C.
The 802.11g standard does not support advanced network security features.
- D.
Using only 802.11g will cause multiple SSIDs to be broadcast.
Correct Answer
A. 802.11a wireless devices will not be able to connect to the wireless network.Explanation
Configuring a wireless router or access point to operate only in accordance with the 802.11g protocol standard would result in a disadvantage of 802.11a wireless devices not being able to connect to the wireless network. This is because 802.11g and 802.11a use different frequency bands and are not compatible with each other. Therefore, by limiting the router or access point to only support 802.11g, any devices that rely on the 802.11a standard would be unable to connect and utilize the wireless network.Rate this question:
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- 15.
What is the maximum segment length that is specified by the 1000BASE-T standard?
- A.
1640 ft (500 m)
- B.
984 ft (300 m)
- C.
328 ft (100 m)
- D.
3280 ft (1000 m)
- E.
607 ft (185 m)
Correct Answer
C. 328 ft (100 m)Explanation
The maximum segment length specified by the 1000BASE-T standard is 328 ft (100 m). This means that according to the standard, the maximum distance between two devices in a 1000BASE-T network should not exceed 328 ft.Rate this question:
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- 16.
Which two characteristics describe Ethernet technology? (Choose two.)
- A.
It is supported by IEEE 802.3 standards.
- B.
It is supported by IEEE 802.5 standards.
- C.
It typically uses an average of 16 Mb/s for data transfer rates.
- D.
It uses a ring topology.
- E.
It uses the CSMA/CD access control method.
Correct Answer(s)
A. It is supported by IEEE 802.3 standards.
E. It uses the CSMA/CD access control method.Explanation
Ethernet technology is supported by IEEE 802.3 standards, which define the physical and data link layer specifications for Ethernet networks. It also uses the CSMA/CD (Carrier Sense Multiple Access with Collision Detection) access control method, which allows multiple devices to share the same network medium and detect and resolve collisions when they occur.Rate this question:
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- 17.
Which three factors are reasons for a company to choose a client/server model for a network instead of peer-to-peer? (Choose three.)
- A.
The company network requires secure access to confidential information.
- B.
Each user understands how to safely share files across a network.
- C.
All employees passed a strict background check as part of the corporate hiring practices.
- D.
The data gathered by the employees is critical and should be backed up on a regular basis.
- E.
The network is small with fewer than eight users.
- F.
The users need a central database to store inventory and sales information.
Correct Answer(s)
A. The company network requires secure access to confidential information.
D. The data gathered by the employees is critical and should be backed up on a regular basis.
F. The users need a central database to store inventory and sales information.Explanation
The three factors that make a client/server model more suitable for a company network instead of peer-to-peer are: the need for secure access to confidential information, the criticality of backing up the data gathered by employees on a regular basis, and the requirement for a central database to store inventory and sales information.Rate this question:
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- 18.
What benefit is provided by a computer data network?
- A.
Increased security
- B.
Decentralized administration
- C.
Resource sharing
- D.
Simplified troubleshooting
Correct Answer
C. Resource sharingExplanation
A computer data network provides the benefit of resource sharing. This means that multiple devices connected to the network can access and share resources such as files, printers, and software applications. This promotes collaboration and efficiency as it eliminates the need for each device to have its own dedicated resources. For example, multiple users can access and edit a shared document simultaneously, or multiple devices can connect to a shared printer. This not only saves costs but also improves productivity by enabling easy access to shared resources from any connected device on the network.Rate this question:
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- 19.
When would a printer be considered a network host?
- A.
When it is connected to a workstation
- B.
When it is connected to a laptop
- C.
When it is connected to a switch
- D.
When it is connected to a PC
Correct Answer
C. When it is connected to a switchExplanation
A printer would be considered a network host when it is connected to a switch because a switch is a networking device that connects multiple devices together in a local area network (LAN). When a printer is connected to a switch, it becomes a part of the network and can communicate with other devices on the same network. This allows other devices, such as workstations, laptops, or PCs, to send print jobs to the printer over the network, making it a network host.Rate this question:
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- 20.
A user can print to a printer that is on the same network, but the traffic of the user cannot reach the Internet. What is a possible cause of the problem?
- A.
The PC default gateway address is missing or incorrect.
- B.
The NIC on the PC is faulty.
- C.
The PC has an incorrect IP address.
- D.
The network cable connected to the user PC is faulty.
Correct Answer
A. The PC default gateway address is missing or incorrect.Explanation
If the user is able to print to a printer on the same network but cannot reach the internet, it suggests that the issue lies with the user's default gateway address. The default gateway is the IP address of the router or gateway device that connects the local network to the internet. If the default gateway address is missing or incorrect on the user's PC, it means that the PC does not know where to send the internet traffic, resulting in the inability to reach the internet.Rate this question:
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- 21.
What is identified by the 100 in the 100BASE-TX standard?
- A.
The maximum cable distance in meters
- B.
The series number of the standard
- C.
The maximum number of network nodes
- D.
The maximum bandwidth in Mb/s
Correct Answer
D. The maximum bandwidth in Mb/sExplanation
The 100 in the 100BASE-TX standard refers to the maximum bandwidth in Mb/s. This standard specifies that the maximum data transfer rate for this type of Ethernet connection is 100 megabits per second.Rate this question:
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- 22.
A user installs a new gigabit NIC in a PC. The user notices that the data transfer rate is much slower than expected. What should the user do to fix the problem?
- A.
Change the NIC duplex setting from half duplex to full duplex.
- B.
Disable sleep mode.
- C.
Disable hibernation mode.
- D.
Change the value assigned to the NIC wake-on-LAN setting.
Correct Answer
A. Change the NIC duplex setting from half duplex to full duplex.Explanation
The user should change the NIC duplex setting from half duplex to full duplex. This is because half duplex mode allows data to be transmitted in only one direction at a time, while full duplex mode allows for simultaneous two-way communication. By changing the setting to full duplex, the data transfer rate should improve as it allows for faster and more efficient communication between the PC and the network.Rate this question:
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- 23.
A company adds a few refurbished computers to a network. The company finds, however, that the refurbished computers perform significantly worse than the original networked computers do. The original computers performed much faster with applications that required the transfer of data over the network. What should the company technicians do?
- A.
Check if the refurbished computers are using a VPN.
- B.
Check if the network interface cards in the refurbished computers are limited to 10 Mb/s
- C.
Check if subnet mask is correct.
- D.
Check if the gateway address is correct.
Correct Answer
B. Check if the network interface cards in the refurbished computers are limited to 10 Mb/sExplanation
The refurbished computers are performing significantly worse than the original networked computers because their network interface cards may be limited to a speed of 10 Mb/s. This limitation in the network interface cards can result in slower data transfer over the network, causing the applications to perform slower. To resolve this issue, the company technicians should check the network interface cards in the refurbished computers and determine if they are indeed limited to 10 Mb/s.Rate this question:
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