Networking Devices and Initial Configuration Module 1.3.3 Network Design Quiz Answers
1. Which two devices would commonly be found at the access layer of the hierarchical enterprise LAN design model? (Choose two.)
- access point
- firewall
- Layer 2 switch
- Layer 3 device
- modular switch
Explanation: While some designs do route at the access layer, the two devices that should always be placed at the access layer of the hierarchical design model are an access point and a Layer 2 switch. A modular switch is commonly used at the core layer. Routing by a Layer 3 device is commonly used in the distribution layer. The firewall is a device in the Internet edge network design.
2. What characteristic of a network enables it to quickly grow to support new users and applications without impacting the performance of the service being delivered to existing users?
- reliability
- scalability
- quality of service
- accessibility
Explanation: Networks must be able to quickly grow to support new users and services, without impacting existing users and services. This ability to grow is known as scalability.
3. Match the definition to the security goal.
Explanation: Place the options in the following order:
| ensuring confidentiality | only the intended recipients can access and read the data |
| maintaining integrity | the assurance that the information has not been altered during transmission |
| ensuring availability | the assurance of timely and reliable access to data |
4. A student is streaming a movie to his computer but the movie keeps stopping. What service would give streaming traffic higher priority and avoid the movie stopping?
- HTTPS
- security
- fault tolerance
- quality of service (QoS)
Explanation: Video data needs to be transmitted in a continuous stream. The QoS can be used to give video data high priority during the data transmission so that video traffic would be sent first.
5. True or False? The impact of the failure of an important network device can be limited by a feature called fault tolerance.
- true
- false
Explanation: A fault tolerant network limits the impact of a failure. Its implementation builds the network in a way that allows quick recovery if a critical network device fails.
6. Which type of address never changes on a device and is similar to a home address?
- MAC address
- IP address
- network address
- logical address
Explanation: A Media Access Control (MAC) address is unique on every device. An Internet Protocol (IP) address is used to communicate with devices on another LAN or on the Internet. A broadcast address allows a single device to communicate with all other devices. A multicast address allows a single device to communicate with a group of devices.
7. What are the three layers of the switch hierarchical design model? (Choose three.)
- access
- data link
- core
- network access
- enterprise
- distribution
Explanation: The access layer is the lowest layer and it provides network access to users. The distribution layer has many functions, but it aggregates data from the access layer, provides filtering, policy control, and sets Layer 3 routing boundaries. The core layer provides high speed connectivity.
8. Which network feature uses redundancy as a means to limit the number of affected users in the event of a failure?
- fault tolerance
- scalability
- quality of service
- security
Explanation: Redundancy in the network design provides fault tolerance to limit the number of affected users if there is a failure.
9. What characteristic of a network would allow video traffic to have priority over traffic from an email application?
- quality of service
- fault tolerance
- scalability
- reliability
Explanation: Quality of Service (QoS) is implemented in networks to prioritize traffic. Traffic for real-time services such as voice and video requires a higher priority than data traffic. This helps to ensure reliable delivery of voice and video content to users.
10. What is the responsibility of the distribution layer in a hierarchical network design?
- It controls the traffic flows between the other layers.
- It provides access to the network for end users.
- It provides a high speed backbone for traffic flows.
- It controls which devices are allowed to communicate on the network.
Explanation: The distribution layer controls the type and amount of traffic that flows from the access layer to the core layer.
11. Which network design model improves efficiency by dividing the network into smaller pieces.
- hierarchical
- redundant
- fault-tolerant
- reliable
Explanation: A hierarchical network design divides the network into smaller pieces to improve efficiency. The Cisco hierarchical design divides the network into three layers, the core, the distribution, and the access.
12. Match the feature with the description
Explanation: Place the options in the following order:
| fault tolerance | provides reliability |
| scalability | allows the network to grow |
| quality of service | prioritizes traffic |
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