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Questions and Answers
Twisted-pair cables use multiple physical wires.
Twisted-pair cables use multiple physical wires.
True
UTP used all four pairs of wires.
UTP used all four pairs of wires.
False
Both sides of a regular network patch cable need to have the same pinout.
Both sides of a regular network patch cable need to have the same pinout.
True
There are differences in terms of how the 568A and 568B standards perform.
There are differences in terms of how the 568A and 568B standards perform.
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A crossover cable connects a computer to another computer directly.
A crossover cable connects a computer to another computer directly.
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In a crossover cable, pin 1 is crossed with pin 6.
In a crossover cable, pin 1 is crossed with pin 6.
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Mini form factor (MFF) connectors are popular for Fibre-Channel adapters, storage area networks, and Gigabit Ethernet adapters.
Mini form factor (MFF) connectors are popular for Fibre-Channel adapters, storage area networks, and Gigabit Ethernet adapters.
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Prices of network cables vary greatly between copper and fiber cables.
Prices of network cables vary greatly between copper and fiber cables.
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Exercise 6.1 asks readers to compare prices of CAT-6 and CAT-7 patch cables of different lengths, as well as fiber-optic cables with different connectors.
Exercise 6.1 asks readers to compare prices of CAT-6 and CAT-7 patch cables of different lengths, as well as fiber-optic cables with different connectors.
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Networking components can be classified into connectivity devices and auxiliary devices.
Networking components can be classified into connectivity devices and auxiliary devices.
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Connectivity devices are necessary for connecting to a network and expanding it.
Connectivity devices are necessary for connecting to a network and expanding it.
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Modems were used in the past for dial-up connections, but are now obsolete due to the availability of cable and DSL modems.
Modems were used in the past for dial-up connections, but are now obsolete due to the availability of cable and DSL modems.
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True or false: Patch cables and crossover cables have the same pin configurations on each end.
True or false: Patch cables and crossover cables have the same pin configurations on each end.
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True or false: Fiber-optic cables use electric voltages for transmission.
True or false: Fiber-optic cables use electric voltages for transmission.
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True or false: Fiber-optic cabling is less expensive to install compared to UTP.
True or false: Fiber-optic cabling is less expensive to install compared to UTP.
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True or false: Single-mode fiber supports higher bandwidth over longer distances compared to multimode fiber.
True or false: Single-mode fiber supports higher bandwidth over longer distances compared to multimode fiber.
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True or false: Multimode fiber allows multiple modes of light to propagate, increasing available bandwidth.
True or false: Multimode fiber allows multiple modes of light to propagate, increasing available bandwidth.
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True or false: MMF can transmit up to 10 Gbps for up to 40 kilometers.
True or false: MMF can transmit up to 10 Gbps for up to 40 kilometers.
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Bridges operate in the Network layer (Layer 3) of the OSI model.
Bridges operate in the Network layer (Layer 3) of the OSI model.
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Bridges can distinguish one protocol from another.
Bridges can distinguish one protocol from another.
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Switches examine the Layer 2 header of incoming packets and forward them to the correct port.
Switches examine the Layer 2 header of incoming packets and forward them to the correct port.
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Switches forward broadcasts because they are addressed to everyone.
Switches forward broadcasts because they are addressed to everyone.
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Managed switches offer additional features such as QoS, redundancy, port mirroring, and VLANs.
Managed switches offer additional features such as QoS, redundancy, port mirroring, and VLANs.
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Routers operate at the Transport layer (Layer 4) of the OSI model.
Routers operate at the Transport layer (Layer 4) of the OSI model.
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Wireless routers are primarily used for large businesses and corporate networks.
Wireless routers are primarily used for large businesses and corporate networks.
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Auxiliary devices provide protection against network connections over power lines.
Auxiliary devices provide protection against network connections over power lines.
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Firewalls can only be stand-alone devices.
Firewalls can only be stand-alone devices.
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DMZs are used for web servers, FTP servers, and email relay servers.
DMZs are used for web servers, FTP servers, and email relay servers.
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Firewalls can only be network-based.
Firewalls can only be network-based.
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Power over Ethernet (PoE) enables the transmission of electricity over network cables.
Power over Ethernet (PoE) enables the transmission of electricity over network cables.
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What layer of the OSI model do bridges operate in?
What layer of the OSI model do bridges operate in?
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What is the main function of bridges?
What is the main function of bridges?
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What type of addresses are bridges aware of?
What type of addresses are bridges aware of?
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Do bridges distinguish one protocol from another?
Do bridges distinguish one protocol from another?
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Do bridges move data across multiple networks simultaneously?
Do bridges move data across multiple networks simultaneously?
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What layer of the OSI model do switches operate in?
What layer of the OSI model do switches operate in?
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What are the two wiring standards for twisted-pair cables?
What are the two wiring standards for twisted-pair cables?
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Which pairs of wires are crossed in a crossover cable?
Which pairs of wires are crossed in a crossover cable?
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When creating a regular network patch cable, which pinout should be followed?
When creating a regular network patch cable, which pinout should be followed?
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What type of connections require a crossover cable?
What type of connections require a crossover cable?
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What is the purpose of the RJ-45 connector in twisted-pair cables?
What is the purpose of the RJ-45 connector in twisted-pair cables?
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What are some newer applications that use all four pairs of wires in twisted-pair cables?
What are some newer applications that use all four pairs of wires in twisted-pair cables?
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What are the differences between cable modems and DSL modems?
What are the differences between cable modems and DSL modems?
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What are the functions of access points?
What are the functions of access points?
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What is the purpose of repeaters and extenders?
What is the purpose of repeaters and extenders?
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What is the difference between active and passive hubs?
What is the difference between active and passive hubs?
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What is the purpose of patch panels?
What is the purpose of patch panels?
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What are the classifications of networking components?
What are the classifications of networking components?
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What are some functions of auxiliary devices in a network?
What are some functions of auxiliary devices in a network?
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What is the purpose of a firewall in a network?
What is the purpose of a firewall in a network?
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What are the different types of firewalls?
What are the different types of firewalls?
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What is the purpose of a demilitarized zone (DMZ)?
What is the purpose of a demilitarized zone (DMZ)?
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How are firewalls configured to control network traffic?
How are firewalls configured to control network traffic?
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What is the purpose of cloud-based network controllers?
What is the purpose of cloud-based network controllers?
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What are the two types of fiber-optic cables and how do they differ?
What are the two types of fiber-optic cables and how do they differ?
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What are the advantages of using fiber-optic cabling?
What are the advantages of using fiber-optic cabling?
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What are the three most commonly used fiber-optic connectors?
What are the three most commonly used fiber-optic connectors?
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What is the maximum transmission speed and distance for multimode fiber (MMF)?
What is the maximum transmission speed and distance for multimode fiber (MMF)?
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What is the maximum transmission speed and distance for single-mode fiber (SMF)?
What is the maximum transmission speed and distance for single-mode fiber (SMF)?
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What are the differences between patch cables and crossover cables?
What are the differences between patch cables and crossover cables?
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Mini form factor (MFF) connectors are popular for ______, storage area networks, and Gigabit Ethernet adapters.
Mini form factor (MFF) connectors are popular for ______, storage area networks, and Gigabit Ethernet adapters.
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Prices of network cables vary greatly between ______ and fiber cables.
Prices of network cables vary greatly between ______ and fiber cables.
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Networking components can be classified into ______ devices and auxiliary devices.
Networking components can be classified into ______ devices and auxiliary devices.
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There are two types of hubs: active and ______, with active hubs having their own power source.
There are two types of hubs: active and ______, with active hubs having their own power source.
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Access points, specifically wireless access points, allow users to connect to a network using ______ technology.
Access points, specifically wireless access points, allow users to connect to a network using ______ technology.
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Patch panels are rack-mounted devices used to connect multiple ______ connections together.
Patch panels are rack-mounted devices used to connect multiple ______ connections together.
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Patch cables and crossover cables have different 'send' and 'receive' ______ on each end.
Patch cables and crossover cables have different 'send' and 'receive' ______ on each end.
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Fiber-optic cables use ______ instead of electric voltages, making them immune to electrical interference and wiretapping.
Fiber-optic cables use ______ instead of electric voltages, making them immune to electrical interference and wiretapping.
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Fiber-optic cables are commonly used as ______ in telecommunication systems and for delivering high-speed Internet connections.
Fiber-optic cables are commonly used as ______ in telecommunication systems and for delivering high-speed Internet connections.
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There are two ______ of fiber-optic cables: single-mode (SMF) and multimode (MMF).
There are two ______ of fiber-optic cables: single-mode (SMF) and multimode (MMF).
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Single-mode fiber uses a single mode of ______ and supports lower bandwidth over longer distances.
Single-mode fiber uses a single mode of ______ and supports lower bandwidth over longer distances.
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Multimode fiber allows multiple ______ of light to propagate, shortening cable distances but delivering more available bandwidth.
Multimode fiber allows multiple ______ of light to propagate, shortening cable distances but delivering more available bandwidth.
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Switches operate at ________ of the OSI model and provide centralized connectivity like hubs, but with significant performance improvements.
Switches operate at ________ of the OSI model and provide centralized connectivity like hubs, but with significant performance improvements.
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Switches examine the ________ of incoming packets and forward them to the correct port, reducing overhead and improving performance.
Switches examine the ________ of incoming packets and forward them to the correct port, reducing overhead and improving performance.
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Switches come in two varieties: unmanaged and ________, with managed switches offering additional features such as QoS, redundancy, port mirroring, and VLANs.
Switches come in two varieties: unmanaged and ________, with managed switches offering additional features such as QoS, redundancy, port mirroring, and VLANs.
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QoS allows administrators to prioritize certain network traffic, such as ________ data.
QoS allows administrators to prioritize certain network traffic, such as ________ data.
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Redundancy in networking terms means having multiple paths to get data from point A to point B, and managed switches use the ________ to implement redundancy.
Redundancy in networking terms means having multiple paths to get data from point A to point B, and managed switches use the ________ to implement redundancy.
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Routers operate at ________ of the OSI model and connect multiple network types, determining the best path for sending data based on logical addresses like IP addresses.
Routers operate at ________ of the OSI model and connect multiple network types, determining the best path for sending data based on logical addresses like IP addresses.
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Wireless routers have gained popularity due to their affordability and functionality for small businesses and home networks. Auxiliary devices enhance network connectivity by providing protection against ______, network connections over power lines, and power over Ethernet cables.
Wireless routers have gained popularity due to their affordability and functionality for small businesses and home networks. Auxiliary devices enhance network connectivity by providing protection against ______, network connections over power lines, and power over Ethernet cables.
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Firewalls act as security guards for networks connected to the Internet, protecting network resources from hackers and preventing access to ______ content.
Firewalls act as security guards for networks connected to the Internet, protecting network resources from hackers and preventing access to ______ content.
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Firewalls can be ______ devices, software installed on a server or router, or a combination of hardware and software.
Firewalls can be ______ devices, software installed on a server or router, or a combination of hardware and software.
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Most firewalls have at least two network connections: one to the Internet and one to the internal network, with some having a third port for a ______ zone (DMZ).
Most firewalls have at least two network connections: one to the Internet and one to the internal network, with some having a third port for a ______ zone (DMZ).
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DMZs are semi-public network segments used for web servers, FTP servers, and ______ relay servers.
DMZs are semi-public network segments used for web servers, FTP servers, and ______ relay servers.
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Firewalls can be network-based, protecting a group of computers, or ______-based, protecting individual computers.
Firewalls can be network-based, protecting a group of computers, or ______-based, protecting individual computers.
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Twisted-pair cables are unique in today’s network environment in that they use multiple physical wires. Those eight wires need to be in the right places in the RJ-45 connector or it’s very likely that the cable will not work properly. To ensure consistency in the industry, two standards have been developed: 568A and ______.
Twisted-pair cables are unique in today’s network environment in that they use multiple physical wires. Those eight wires need to be in the right places in the RJ-45 connector or it’s very likely that the cable will not work properly. To ensure consistency in the industry, two standards have been developed: 568A and ______.
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Older implementations using UTP used only two pairs of wires, and those two pairs were matched to pins 1, 2, 3, and 6 in the connector. Newer applications such as Voice over IP and Gigabit Ethernet use all four pairs of wires, so you need to make sure that they’re all where they’re supposed to be. If you’re creating a regular network patch cable to connect a computer to a hub or switch, both sides need to have the same pinout. For that, follow either the 568A standard shown in Figure 6.24 or the ______ standard shown in Figure 6.25. Although there are no differences in terms of how the standards perform, some companies prefer one to the other.
Older implementations using UTP used only two pairs of wires, and those two pairs were matched to pins 1, 2, 3, and 6 in the connector. Newer applications such as Voice over IP and Gigabit Ethernet use all four pairs of wires, so you need to make sure that they’re all where they’re supposed to be. If you’re creating a regular network patch cable to connect a computer to a hub or switch, both sides need to have the same pinout. For that, follow either the 568A standard shown in Figure 6.24 or the ______ standard shown in Figure 6.25. Although there are no differences in terms of how the standards perform, some companies prefer one to the other.
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If you are going to create a cable to connect a computer to another computer directly, or you’re going to make a connection from hub to hub, switch to switch, hub to switch, or a computer directly to a router, then you need what’s called a crossover ______. In a crossover cable, pin 1 to pin 3 and pin 2 to pin 6 are crossed on one side of the cable only.
If you are going to create a cable to connect a computer to another computer directly, or you’re going to make a connection from hub to hub, switch to switch, hub to switch, or a computer directly to a router, then you need what’s called a crossover ______. In a crossover cable, pin 1 to pin 3 and pin 2 to pin 6 are crossed on one side of the cable only.
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Wiring Standards Twisted-pair cables are unique in today’s network environment in that they use multiple physical wires. Those eight wires need to be in the right places in the RJ-45 connector or it’s very likely that the cable will not work properly. To ensure consistency in the industry, two standards have been developed: ______ and 568B.
Wiring Standards Twisted-pair cables are unique in today’s network environment in that they use multiple physical wires. Those eight wires need to be in the right places in the RJ-45 connector or it’s very likely that the cable will not work properly. To ensure consistency in the industry, two standards have been developed: ______ and 568B.
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If you are going to create a cable to connect a computer to another computer directly, or you’re going to make a connection from hub to hub, switch to switch, hub to switch, or a computer directly to a router, then you need what’s called a ______ cable. In a crossover cable, pin 1 to pin 3 and pin 2 to pin 6 are crossed on one side of the cable only.
If you are going to create a cable to connect a computer to another computer directly, or you’re going to make a connection from hub to hub, switch to switch, hub to switch, or a computer directly to a router, then you need what’s called a ______ cable. In a crossover cable, pin 1 to pin 3 and pin 2 to pin 6 are crossed on one side of the cable only.
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Although there are no differences in terms of how the standards perform, some companies prefer one to the other. Figure 6.24 568A standard If you are going to create a cable to connect a computer to another computer directly, or you’re going to make a connection from hub to hub, switch to switch, hub to switch, or a computer directly to a router, then you need what’s called a crossover cable. In a crossover cable, pin 1 to pin 3 and pin 2 to pin 6 are crossed on one side of the cable only.
Although there are no differences in terms of how the standards perform, some companies prefer one to the other. Figure 6.24 568A standard If you are going to create a cable to connect a computer to another computer directly, or you’re going to make a connection from hub to hub, switch to switch, hub to switch, or a computer directly to a router, then you need what’s called a crossover cable. In a crossover cable, pin 1 to pin 3 and pin 2 to pin 6 are crossed on one side of the cable only.
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Study Notes
Overview of Network Auxiliary Devices
- Wireless routers have gained popularity due to their affordability and functionality for small businesses and home networks.
- Auxiliary devices enhance network connectivity by providing protection against malicious attacks, network connections over power lines, and power over Ethernet cables.
- Firewalls act as security guards for networks connected to the Internet, protecting network resources from hackers and preventing access to undesirable content.
- Firewalls can be stand-alone devices, software installed on a server or router, or a combination of hardware and software.
- Most firewalls have at least two network connections: one to the Internet and one to the internal network, with some having a third port for a demilitarized zone (DMZ).
- DMZs are semi-public network segments used for web servers, FTP servers, and email relay servers.
- Firewalls can be network-based, protecting a group of computers, or host-based, protecting individual computers.
- Firewalls are configured with access control lists (ACLs) to allow or block traffic based on IP address, port number, or domain name.
- Cloud-based network controllers enable remote management of cloud-capable network infrastructure, including access points, switches, and routers.
- Wireless mesh networks (WMNs) can be created and managed from anywhere using a cloud-based network controller and compatible hardware.
- Ethernet over Power allows network connections to be established using electrical outlets when running cables or using wireless is not feasible.
- Power over Ethernet (PoE) enables the transmission of electricity over network cables, useful for providing power to wireless access points in remote locations without power outlets.
Overview of Fiber-Optic Cabling and Connectors
- Patch cables and crossover cables have different "send" and "receive" pin configurations on each end.
- Fiber-optic cabling consists of a thin glass or plastic fiber surrounded by a rubberized outer coating.
- It provides transmission speeds from 100 Mbps to 10 Gbps and can cover several miles in distance.
- Fiber-optic cables use light pulses instead of electric voltages, making them immune to electrical interference and wiretapping.
- Fiber-optic cabling is more expensive to install compared to UTP, but it is ideal for high-speed transmission and long distances.
- Fiber-optic cables are commonly used as backbones in telecommunication systems and for delivering high-speed Internet connections.
- There are two types of fiber-optic cables: single-mode (SMF) and multimode (MMF).
- Single-mode fiber uses a single mode of light and supports lower bandwidth over longer distances.
- Multimode fiber allows multiple modes of light to propagate, shortening cable distances but delivering more available bandwidth.
- MMF can transmit up to 10 Gbps for up to 550 meters, while SMF can transmit up to 10 Gbps for up to 40 kilometers.
- Common cable types and their characteristics are summarized in Table 6.3, including maximum speed and distance.
- The most commonly used fiber-optic connectors are ST, SC, and LC, each with their own attachment mechanisms and popularity for LAN connections.
Overview of Network Auxiliary Devices
- Wireless routers have gained popularity due to their affordability and functionality for small businesses and home networks.
- Auxiliary devices enhance network connectivity by providing protection against malicious attacks, network connections over power lines, and power over Ethernet cables.
- Firewalls act as security guards for networks connected to the Internet, protecting network resources from hackers and preventing access to undesirable content.
- Firewalls can be stand-alone devices, software installed on a server or router, or a combination of hardware and software.
- Most firewalls have at least two network connections: one to the Internet and one to the internal network, with some having a third port for a demilitarized zone (DMZ).
- DMZs are semi-public network segments used for web servers, FTP servers, and email relay servers.
- Firewalls can be network-based, protecting a group of computers, or host-based, protecting individual computers.
- Firewalls are configured with access control lists (ACLs) to allow or block traffic based on IP address, port number, or domain name.
- Cloud-based network controllers enable remote management of cloud-capable network infrastructure, including access points, switches, and routers.
- Wireless mesh networks (WMNs) can be created and managed from anywhere using a cloud-based network controller and compatible hardware.
- Ethernet over Power allows network connections to be established using electrical outlets when running cables or using wireless is not feasible.
- Power over Ethernet (PoE) enables the transmission of electricity over network cables, useful for providing power to wireless access points in remote locations without power outlets.
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Test your knowledge of network auxiliary devices with this quiz! Learn about wireless routers, firewalls, DMZs, cloud-based network controllers, Ethernet over Power, and Power over Ethernet. See how well you understand these devices and their role in enhancing network connectivity and security.
