11.7.3 Network Infrastructure and Device Facts

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Questions and Answers

What is the primary function of a router in a network?

To provide wireless access to a network

To manage traffic through VLANs and QoS settings

To connect client devices using Ethernet cables

To connect two networks together and forward traffic (correct)

How does a switch differ from a hub in a network?

A switch requires a login for configuration.

A switch sends data packets only to the intended recipient. (correct)

A switch uses wireless signals to connect devices.

A switch broadcasts data to all connected devices.

What is the purpose of a firewall in network infrastructure?

To enhance the wireless connectivity of a network

To monitor and control incoming and outgoing traffic (correct)

To increase the number of connected devices

To connect various local networks together

What is a key characteristic of managed switches?

They allow for network monitoring and configuration. Signup and view all the answers

What is the main role of a wireless access point (WAP) in a network?

To provide access to a wireless network Signup and view all the answers

What is a VLAN in the context of network infrastructure?

A virtual network created on a switch for broadcast domains Signup and view all the answers

What potential issue is associated with a hub as a network component?

Increased collisions due to broadcasting all data Signup and view all the answers

What essential function does Power over Ethernet (PoE) provide?

Provides power and data over a single Ethernet cable. Signup and view all the answers

What is the primary function of Power over Ethernet (PoE)?

To power devices through Ethernet cables. Signup and view all the answers

Which mode of Power over Ethernet uses the same four wires for data and power transmission?

Mode A Signup and view all the answers

Which of the following PoE standards provides the maximum power output of 100 watts?

802.3bt Type 4 Signup and view all the answers

What happens if a PoE device is connected to a non-PoE switch?

A PoE injector may be required to provide power. Signup and view all the answers

What is a key characteristic of an active PoE injector?

Conforms to the 802.3 standards. Signup and view all the answers

Which devices typically use the 802.3af PoE standard?

Wireless access points and low powered devices. Signup and view all the answers

What advantage does software-defined networking (SDN) provide for network management?

It allows for remote management of network devices. Signup and view all the answers

Which of the following is a potential risk when using a passive PoE injector?

It can cause the device to overheat due to excessive power. Signup and view all the answers

What is required for PoE to function correctly?

Both the device and the switch must support PoE. Signup and view all the answers

Which of the following statements about Ethernet cables is true?

They typically use four out of eight wires to transmit data. Signup and view all the answers

Study Notes

Network Hardware

A Wireless Access Point allows devices to connect to a wireless network
A Patch Panel terminates all network ports in a building
Ethernet Cables connect devices to a network port
A Router connects two networks together and handles traffic flow between them
A Hub broadcasts all incoming data to connected devices, causing potential collisions and security risks
A Switch sends data packets only to the intended recipient, enhancing security and efficiency
- Managed switches permit configuration changes by administrators
- Unmanaged switches have no configuration options
A VLAN is a virtual network created on a switch to increase security and efficiency
A Firewall monitors network traffic, blocking or allowing traffic based on configuration settings

Power Over Ethernet (PoE)

PoE allows devices to receive power via Ethernet cables
PoE standards are classified under the IEEE 802.3 standard
- 802.3af (Type 1, Standard PoE) - Provides up to 15.4 watts of power for devices like VoIP Phones and sensors
- 802.3at (Type 2, PoE+) - Provides up to 30 watts of power for devices like biometric sensors and tablets
- ** 802.3bt** (Type 3, PoE++) - Provides up to 60 watts of power for devices like video-conferencing equipment
- 802.3bt (Type 4, Higher-power PoE) - Provides up to 100 watts of power for devices like laptops and TVs
Both devices and switches must support PoE to utilize PoE
A PoE Injector allows devices to receive power over Ethernet cables when the switch does not support it
- Active injectors conform to the 802.3 standards, ensuring safe power delivery
- Passive injectors do not conform to the 802.3 standards, which could potentially damage devices

Software-Defined Networking (SDN)

SDN is a centralized network controller allowing remote management of network devices
Centralized management simplifies and enhances efficiency in large networks

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Description

This quiz covers essential concepts of network hardware, including wireless access points, routers, switches, and firewalls. It also explores Power over Ethernet (PoE) and its standards such as IEEE 802.3. Test your knowledge about how these components work together to create secure and efficient networks.