Podcast
Questions and Answers
What is the primary function of a router?
What is the primary function of a router?
- Connecting LAN, WAN, copper, and fiber connections
- Combining functionality of switches, routers, and wireless access points
- Directly connecting a laptop or desktop computer
- Forwarding traffic between different IP subnets (correct)
In which layer of the OSI model does routing take place?
In which layer of the OSI model does routing take place?
- Layer 3 (correct)
- Layer 4
- Layer 2
- Layer 7
What type of device is commonly used when plugging a laptop or desktop computer using a copper cable?
What type of device is commonly used when plugging a laptop or desktop computer using a copper cable?
- Layer 3 switch
- Switch (correct)
- SOHO router
- Router
When might routers be used to connect different types of networks together?
When might routers be used to connect different types of networks together?
What is the primary factor used by a router to forward traffic?
What is the primary factor used by a router to forward traffic?
What contributes to the high forwarding rates of switches in enterprise networks?
What contributes to the high forwarding rates of switches in enterprise networks?
What feature may be supported by core enterprise switches?
What feature may be supported by core enterprise switches?
Which type of switch has minimal configuration options and no VLAN support?
Which type of switch has minimal configuration options and no VLAN support?
What capability distinguishes managed switches from unmanaged switches?
What capability distinguishes managed switches from unmanaged switches?
What function may be supported by managed switches for packet analysis?
What function may be supported by managed switches for packet analysis?
What is the primary basis for forwarding decisions by access points?
What is the primary basis for forwarding decisions by access points?
In large work environments, what are patch panels used for?
In large work environments, what are patch panels used for?
What type of connector is typically used to connect cables to switches?
What type of connector is typically used to connect cables to switches?
What kind of support does a managed switch offer that an unmanaged switch does not?
What kind of support does a managed switch offer that an unmanaged switch does not?
What type of switch may have limited integration with other devices?
What type of switch may have limited integration with other devices?
What capability does a managed switch have that an unmanaged switch lacks?
What capability does a managed switch have that an unmanaged switch lacks?
What is the purpose of patch panels in wiring closets?
What is the purpose of patch panels in wiring closets?
What type of connectors do RJ45 patch panels have for cables coming from desks?
What type of connectors do RJ45 patch panels have for cables coming from desks?
What is the function of traditional firewalls at OSI Layer 4?
What is the function of traditional firewalls at OSI Layer 4?
What is a feature of modern firewalls?
What is a feature of modern firewalls?
What is the role of firewalls as endpoints for encrypted tunnels?
What is the role of firewalls as endpoints for encrypted tunnels?
What do Power Over Ethernet (POE) injectors provide?
What do Power Over Ethernet (POE) injectors provide?
What does the original POE specification (802.3af) provide in terms of power?
What does the original POE specification (802.3af) provide in terms of power?
Why is POE important for devices such as access points and cameras?
Why is POE important for devices such as access points and cameras?
What type of interfaces do switches have that support POE?
What type of interfaces do switches have that support POE?
What is the function of POE switches?
What is the function of POE switches?
What is the role of some firewalls as proxies?
What is the role of some firewalls as proxies?
Which POE specification provides 51 watts and 600 milliamps for modern devices?
Which POE specification provides 51 watts and 600 milliamps for modern devices?
What is the primary drawback of using hubs for networking?
What is the primary drawback of using hubs for networking?
Which networking device is commonly used for broadband communication over cable networks?
Which networking device is commonly used for broadband communication over cable networks?
What is a limitation of DSL modems in terms of speed and distance?
What is a limitation of DSL modems in terms of speed and distance?
What type of network does a Network Interface Card (NIC) connect devices to?
What type of network does a Network Interface Card (NIC) connect devices to?
What type of connection requires an Optical Network Terminal (ONT) for connectivity?
What type of connection requires an Optical Network Terminal (ONT) for connectivity?
What makes hubs inefficient for networking?
What makes hubs inefficient for networking?
Which device is known for providing high-speed internet over telephone lines?
Which device is known for providing high-speed internet over telephone lines?
What is the primary function of a cable modem?
What is the primary function of a cable modem?
What technology is required for connecting fiber connections to the ISP's network?
What technology is required for connecting fiber connections to the ISP's network?
What is the limitation of hubs in terms of communication capabilities?
What is the limitation of hubs in terms of communication capabilities?
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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.
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