38 Questions
What is the primary function of a router?
Forwarding traffic between different IP subnets
In which layer of the OSI model does routing take place?
Layer 3
What type of device is commonly used when plugging a laptop or desktop computer using a copper cable?
Switch
When might routers be used to connect different types of networks together?
To connect different types of networks together
What is the primary factor used by a router to forward traffic?
IP addresses
What contributes to the high forwarding rates of switches in enterprise networks?
Hardware-based decisions and ASICs
What feature may be supported by core enterprise switches?
POE support
Which type of switch has minimal configuration options and no VLAN support?
Unmanaged switch
What capability distinguishes managed switches from unmanaged switches?
VLAN configuration
What function may be supported by managed switches for packet analysis?
Port mirroring
What is the primary basis for forwarding decisions by access points?
MAC addresses
In large work environments, what are patch panels used for?
Managing cables to the central wiring closet
What type of connector is typically used to connect cables to switches?
Ethernet connectors
What kind of support does a managed switch offer that an unmanaged switch does not?
VLAN configuration.
What type of switch may have limited integration with other devices?
Unmanaged switch.
What capability does a managed switch have that an unmanaged switch lacks?
VLAN configuration.
What is the purpose of patch panels in wiring closets?
To allow for easy movement of cable connections between switches
What type of connectors do RJ45 patch panels have for cables coming from desks?
RJ45 connectors
What is the function of traditional firewalls at OSI Layer 4?
Allowing or disallowing traffic based on IP addresses and port numbers
What is a feature of modern firewalls?
Understanding application layer traffic and performing security functions
What is the role of firewalls as endpoints for encrypted tunnels?
Connecting sites over public networks with secure communication
What do Power Over Ethernet (POE) injectors provide?
Power to devices not supported by switches
What does the original POE specification (802.3af) provide in terms of power?
15.4 watts
Why is POE important for devices such as access points and cameras?
Where power may be difficult to run
What type of interfaces do switches have that support POE?
Interfaces supporting POE
What is the function of POE switches?
To directly provide power to connected devices
What is the role of some firewalls as proxies?
Performing browsing for users and blocking malicious traffic
Which POE specification provides 51 watts and 600 milliamps for modern devices?
802.3bt
What is the primary drawback of using hubs for networking?
Inefficient re-transmission of data to all interfaces
Which networking device is commonly used for broadband communication over cable networks?
Cable modems
What is a limitation of DSL modems in terms of speed and distance?
Speeds vary depending on distance from Central Office and provider
What type of network does a Network Interface Card (NIC) connect devices to?
Copper, fiber, serial, and wireless networks
What type of connection requires an Optical Network Terminal (ONT) for connectivity?
Fiber connections
What makes hubs inefficient for networking?
Re-transmission of data to all interfaces
Which device is known for providing high-speed internet over telephone lines?
DSL modems
What is the primary function of a cable modem?
Support high-speed internet over cable networks
What technology is required for connecting fiber connections to the ISP's network?
Optical Network Terminal (ONT)
What is the limitation of hubs in terms of communication capabilities?
Limited to half duplex communication
Study Notes
- Hubs were once commonly used to connect devices on a network, acting as multi-port repeaters.
- Hubs re-transmit data to all interfaces, which is inefficient and limits communication to half duplex.
- Hubs are outdated with speeds limited to 10 Mbps and 100 Mbps.
- Cable modems are used for broadband communication over cable networks and support DOCSIS standard.
- DSL modems provide Internet connectivity over telephone lines, with speeds varying depending on distance from Central Office and provider.
- Fiber connections are used for high-speed internet and require an Optical Network Terminal (ONT) to connect to the ISP's network.
- Network Interface Cards (NICs) are used to connect devices to various types of networks, including copper, fiber, serial, and wireless.
- Hubs are not efficient for networking due to the re-transmission of data to all interfaces.
- Cable modems support high-speed internet and can provide other services such as cable television and phone lines.
- DSL modems provide internet connectivity using telephone lines and have limitations in terms of distance and speed.
- Fiber connections offer high-speed internet and require an ONT to convert the fiber signal to a form usable inside a building.
- NICs are used to connect devices to various types of networks and come in different forms such as cards, built-in interfaces, and adapters.
Test your knowledge of patch panels and switch connectivity with this quiz. Learn about the benefits of using patch panels in managing switch connections.
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