LAN Switching And Wireless - Chapter 1 Exam
CCNA Exploration v4 - Networking 207 (LAN Switching and Wireless) - Chapter 1 Exam
- 1.
Which layer of the hierarchical network design model is refered to as the high-speed backbone of the internetwork, where high availability and redundancy are critical?
- A.
Access layer
- B.
Core layer
- C.
Data-link layer
- D.
Distribution layer
- E.
Network layer
- F.
Physical layer
Correct Answer
B. Core layerExplanation
The core layer of the hierarchical network design model is referred to as the high-speed backbone of the internetwork, where high availability and redundancy are critical. This layer is responsible for routing and forwarding packets at high speeds, ensuring efficient and reliable communication between different parts of the network. It connects multiple distribution layer switches and provides a centralized point for network management and control. The core layer is designed to handle large amounts of traffic and should be highly reliable to prevent any disruptions in network connectivity.Rate this question:
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- 2.
Which layer of the hierarchical design model provides a means of connecting devices to the network and controlling which devices are allowed to communicate on the network?
- A.
Application
- B.
Access
- C.
Distribution
- D.
Network
- E.
Core
Correct Answer
B. AccessExplanation
The access layer of the hierarchical design model provides a means of connecting devices to the network and controlling which devices are allowed to communicate on the network. This layer is responsible for authenticating and authorizing devices, as well as enforcing security policies. It also handles the physical connections and media types used to connect devices to the network.Rate this question:
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- 3.
Which hierarchical design model layer controls the flow of network traffic using policies and delineates broadcast domains by performing routing functions between virtual LANs (VLANs)?
- A.
Application
- B.
Access
- C.
Distribution
- D.
Network
- E.
Core
Correct Answer
C. DistributionExplanation
The distribution layer in a hierarchical design model controls the flow of network traffic using policies and performs routing functions between virtual LANs (VLANs). This layer helps in segmenting the network into different broadcast domains and ensures efficient traffic distribution throughout the network. It acts as an intermediary between the access layer and the core layer, providing connectivity to various devices and connecting different network segments.Rate this question:
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- 4.
What is the likely impact of moving a conventional company architecture to a completely converged network?
- A.
Local analog phone service can be completely outsourced to cost-effective providers.
- B.
The Ethernet VLAN structure is less complex.
- C.
A shared infrastructure is created resulting in a single network to manage.
- D.
QoS issues are greatly reduced.
- E.
There is less bandwidth competition between voice and video streams.
Correct Answer
C. A shared infrastructure is created resulting in a single network to manage.Explanation
Moving a conventional company architecture to a completely converged network creates a shared infrastructure, which means that there is only one network to manage. This simplifies network management and reduces the complexity of maintaining multiple networks. It also allows for better resource allocation and utilization, as all devices and services can be accessed through a single network. This can result in cost savings and improved efficiency for the company.Rate this question:
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- 5.
Link aggregation should be implemented at which layer of the hierarchical network?
- A.
Core only
- B.
Distribution and core
- C.
Access and distribution
- D.
Access, distribution, and core
Correct Answer
D. Access, distribution, and coreExplanation
Link aggregation should be implemented at the access, distribution, and core layers of the hierarchical network. Link aggregation, also known as port trunking or bonding, is a technique used to combine multiple physical links into a single logical link. Implementing link aggregation at all three layers ensures that the network can handle increased traffic and provides redundancy. By aggregating links at the access layer, it allows for better utilization of bandwidth and load balancing. At the distribution layer, link aggregation provides increased bandwidth and redundancy for connecting access layer switches. Finally, at the core layer, link aggregation helps in achieving high-speed connectivity and fault tolerance for the entire network.Rate this question:
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- 6.
What statement best describes a modular switch?
- A.
A slim-line chassis
- B.
Allows interconnection of switches on redundant backplane
- C.
Defined physical characteristics
- D.
Flexible characteristics
Correct Answer
D. Flexible characteristicsExplanation
A modular switch is best described by its flexible characteristics. This means that it has the ability to be customized and adapted to meet specific needs and requirements. It can support various types of modules and can be easily upgraded or expanded as needed. This flexibility allows for scalability and future-proofing of the network infrastructure.Rate this question:
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- 7.
Which feature supports higher throughput in switched networks by combining multiple switch ports?
- A.
Convergance
- B.
Redundant links
- C.
Link aggregation
- D.
Network diameter
Correct Answer
C. Link aggregationExplanation
Link aggregation is a feature that supports higher throughput in switched networks by combining multiple switch ports. It allows multiple physical links to be bundled together into a single logical link, increasing the overall bandwidth and improving network performance. This is achieved by distributing the traffic load across the aggregated links, providing higher throughput and better utilization of available network resources. By combining the bandwidth of multiple links, link aggregation enhances network capacity and supports faster data transmission between switches and connected devices.Rate this question:
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- 8.
Configuring communication between devices on different VLANs requires the use of which layer of the OSI model?
- A.
Layer 1
- B.
Layer 3
- C.
Layer 4
- D.
Layer 5
Correct Answer
B. Layer 3Explanation
Configuring communication between devices on different VLANs requires the use of Layer 3 of the OSI model. Layer 3, also known as the network layer, is responsible for logical addressing and routing. It handles the movement of data packets between different networks and performs functions such as IP addressing, routing protocols, and packet forwarding. In the context of VLANs, Layer 3 devices such as routers are used to enable communication between VLANs by routing traffic between them.Rate this question:
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- 9.
Which two characteristics are associated with enterprise level switches? (Choose two)
- A.
Low port density
- B.
High forwarding rate
- C.
High latency level
- D.
Support link aggregation
- E.
Predefined number of ports
Correct Answer(s)
B. High forwarding rate
D. Support link aggregationExplanation
Enterprise level switches are designed to handle large networks and high traffic volumes. They need to have a high forwarding rate, which means they can process and forward data packets quickly. This is important for ensuring efficient communication within the network. Additionally, enterprise level switches should support link aggregation, which allows multiple network links to be combined into a single logical link. This increases bandwidth and provides redundancy, improving network performance and reliability. Therefore, high forwarding rate and support for link aggregation are two characteristics associated with enterprise level switches.Rate this question:
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- 10.
Which two features are supported at all three levels of the Cisco three-layer hierarchical model? (Choose two)
- A.
Power over Ethernet
- B.
Load balancing accross redundant trunk links
- C.
Redundant components
- D.
Quality of Service
- E.
Link aggregation
Correct Answer(s)
D. Quality of Service
E. Link aggregationExplanation
Quality of Service and link aggregation are supported at all three levels of the Cisco three-layer hierarchical model. Quality of Service allows for prioritizing and managing network traffic to ensure that critical applications and services receive the necessary bandwidth and resources. Link aggregation, also known as port-channel or EtherChannel, allows multiple physical links to be combined into a single logical link, increasing bandwidth and providing redundancy. These features are important for optimizing network performance and ensuring high availability in the hierarchical model.Rate this question:
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- 11.
A network administrator is selecting a switch that will operate at the network core. Which three features should the switch support for optimum network performance and reliability? (Choose three)
- A.
Port security
- B.
Security policies
- C.
10 Gigabit Ethernet
- D.
Quality of Service (QoS)
- E.
Hot-swappable hardware
- F.
Power over Ethernet (PoE)
Correct Answer(s)
C. 10 Gigabit Ethernet
D. Quality of Service (QoS)
E. Hot-swappable hardwareExplanation
For optimum network performance and reliability at the network core, the switch should support 10 Gigabit Ethernet to ensure high-speed data transmission. Quality of Service (QoS) is important to prioritize and manage network traffic effectively, ensuring that critical applications receive the necessary bandwidth. Hot-swappable hardware allows for easy replacement of faulty components without disrupting network operations, enhancing reliability and minimizing downtime. Port security, security policies, and Power over Ethernet (PoE) are not mentioned as essential features for network performance and reliability at the network core.Rate this question:
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- 12.
Which hierarchical design characteristic would be recommended at both the core and distribution layers to protect the network in the case of a route failure?
- A.
PoE
- B.
Redundancy
- C.
Aggregation
- D.
Access lists
Correct Answer
B. RedundancyExplanation
Redundancy is the recommended hierarchical design characteristic at both the core and distribution layers to protect the network in the case of a route failure. Redundancy refers to the duplication of critical components or paths in a network to ensure that if one fails, there is an alternative available to maintain network connectivity and minimize downtime. By implementing redundancy at both the core and distribution layers, the network can have backup routes and redundant devices in place to automatically take over in case of a route failure, thus enhancing network reliability and resilience.Rate this question:
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- 13.
At which heirarchical layer are switches normally not required to process all ports at wire speed?
- A.
Core layer
- B.
Distribution layer
- C.
Access layer
- D.
Entry layer
Correct Answer
C. Access layerExplanation
Switches are normally not required to process all ports at wire speed at the access layer. The access layer is the layer closest to end-user devices, such as computers and printers, and is responsible for connecting these devices to the network. Since the access layer deals with a large number of end devices, switches at this layer typically do not need to process all ports at wire speed because the traffic volume is lower compared to the core or distribution layers.Rate this question:
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- 14.
For organizations that are implementing a voice over IP solution, what functionality should be enabled at all three layers of the hierarchical network?
- A.
Power over Ethernet (PoE)
- B.
Quality of Service (QoS)
- C.
Switch port security
- D.
Inter-VLAN routing
Correct Answer
B. Quality of Service (QoS)Explanation
When implementing a voice over IP solution, Quality of Service (QoS) should be enabled at all three layers of the hierarchical network. QoS ensures that voice traffic is prioritized and given sufficient bandwidth to maintain high call quality. This is important because voice traffic is delay-sensitive and requires a consistent and reliable network connection. By enabling QoS at all layers, the network can prioritize voice traffic over other types of data, such as file transfers or web browsing, to ensure a smooth and uninterrupted communication experience.Rate this question:
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- 15.
Refer to the exhibit CH1-1 (on flash drive). Beginning with HR servers and workstations, a network engineer is designing a new security structure for the network. Which set of policies adheres to the hierarchical network model design principles?
- A.
Implement Layer 3 switching on S1 to reduce the packet processing load on D1 and D2. Install all security processing on S1 to reduce network traffic load.
- B.
Configure port security options on S1. Use Layer 3 access control features on D1 and D2 to limit access to the HR servers to just the HR subnet.
- C.
Move all HR assets out of the data center and connect them to S1. Use Layer 3 security functions on S1 to deny all traffic into and out of S1.
- D.
Perform all port access and Layer 3 security functions on C1.
Correct Answer
B. Configure port security options on S1. Use Layer 3 access control features on D1 and D2 to limit access to the HR servers to just the HR subnet.Explanation
The correct answer suggests configuring port security options on S1 and using Layer 3 access control features on D1 and D2 to limit access to the HR servers to just the HR subnet. This adheres to the hierarchical network model design principles by implementing security measures at different layers of the network. By configuring port security on S1, unauthorized access to the network can be prevented. Additionally, by using Layer 3 access control features on D1 and D2, access to the HR servers can be limited to only the HR subnet, ensuring secure communication within the network.Rate this question:
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- 16.
A network technician is asked to examine an existing switched network. Following this examination, the technician makes recommendations for adding new switches where needed and replacing existing equipment that hampers performance. The technician is given a budget and asked to proceed. Which two pieces of information would be helpful in determining necessary port density for new switches? (Choose two.)
- A.
Forwarding rate
- B.
Traffic flow analysis
- C.
Expected future growth
- D.
Number of required core connections
- E.
Number of hubs that are needed in the access layer to increase performance
Correct Answer(s)
B. Traffic flow analysis
C. Expected future growthExplanation
To determine the necessary port density for new switches, the network technician would need information about traffic flow analysis and expected future growth. Traffic flow analysis helps identify the volume and patterns of network traffic, allowing the technician to determine the required number of ports to handle the current and future traffic load. Expected future growth provides insights into the expansion of the network, helping the technician plan for additional ports to accommodate the growing number of devices and users. These two pieces of information are crucial in making informed decisions about the port density requirements for the new switches.Rate this question:
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- 17.
A technician is attempting to explain Cisco StackWise technology to a client that is setting up three stackable switches. Which explanation accurately describes StackWise technology?
- A.
StackWise technology allows up to eight ports to be bound together to increase available bandwidth.
- B.
StackWise technology allows the switch to deliver power to end devices by using existing Ethernet cabling.
- C.
StackWise technology allows the switch capabilities and ports to be expanded by the addition of line cards.
- D.
StackWise technology allows up to nine switches to be interconnected via the use of a fully redundant backplane.
Correct Answer
D. StackWise technology allows up to nine switches to be interconnected via the use of a fully redundant backplane.Explanation
StackWise technology allows multiple switches to be interconnected using a fully redundant backplane, enabling them to function as a single logical unit. This allows for increased scalability and flexibility in network design. By connecting up to nine switches, the network can benefit from improved performance, increased bandwidth, and simplified management. The use of a fully redundant backplane ensures high availability and fault tolerance, minimizing the risk of network downtime.Rate this question:
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- 18.
Which three features are commonly supported at the distribution layer of the Cisco hierarchical network model? (Choose three.)
- A.
Security policies
- B.
Power over Ethernet (PoE)
- C.
Switch port security
- D.
Quality of Service (QoS)
- E.
Layer 3 functunality
- F.
End user acess to network
Correct Answer(s)
A. Security policies
D. Quality of Service (QoS)
E. Layer 3 functunalityExplanation
At the distribution layer of the Cisco hierarchical network model, three commonly supported features are security policies, Quality of Service (QoS), and Layer 3 functionality. Security policies help in implementing access control and ensuring the network's security. Quality of Service (QoS) allows for prioritization of network traffic, ensuring that critical applications receive the necessary bandwidth and latency requirements. Layer 3 functionality enables routing and interconnection between different networks, facilitating communication across the network. These three features are crucial for maintaining a secure and efficient network infrastructure at the distribution layer.Rate this question:
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- 19.
Which layer of the OSI model does an access layer LAN switch use to make a forwarding decision?
- A.
Layer 1
- B.
Layer 2
- C.
Layer 3
- D.
Layer 4
Correct Answer
B. Layer 2Explanation
An access layer LAN switch uses Layer 2 of the OSI model to make a forwarding decision. Layer 2, also known as the Data Link layer, is responsible for the reliable transmission of data over a physical link. It provides services such as addressing, framing, and error detection. The access layer switch uses the MAC addresses of devices connected to it to determine the appropriate port to forward the data to. Layer 2 switches operate at the data link layer and do not perform routing functions like Layer 3 switches.Rate this question:
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- 20.
Refer to the exhibit CH1-2 (on flash drive). What characteristic of hierarchical network designs is exhibited by having SW3 connected to both SW1 and Sw2?
- A.
Scalability
- B.
Security
- C.
Redundancy
- D.
Maintainability
Correct Answer
C. RedundancyExplanation
Having SW3 connected to both SW1 and SW2 exhibits the characteristic of redundancy. Redundancy in network designs ensures that there are multiple paths for data to travel, which improves network reliability and fault tolerance. In case one connection fails, the other connection can still be used to maintain network connectivity. This redundancy helps to minimize downtime and ensures that the network remains operational even in the event of a failure.Rate this question:
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