Wireless Chapter 3
Why is it better to configure access points from the wired side of the network?
You are not sending secure information over the internet.
What is the nominal voltage for PoE?
48 volts of DC or VDC
A wireless repeater can reduce the data throughput by up to _____ percent.
50
Which IEEE 802.11 standard and which wireless access point grade can support Wi-Fi multimedia certifications and QoS?
802.11e Enterprise-grade
Ratified in 2005, which IEEE 802.11 amendment covers security?
802.11i
The IEEE ________ amendment specifies fast transition (FT) and the IEEE ________ amendment helps with this functionality.
802.11r 802.11k
Which IEEE 802.11 standard and which wireless access point grade can support fast BSS transition (FT)?
802.11r Enterprise-grade
The IEEE ___________ amendment to the IEEE 802.11 standard included wireless mesh networking in 2011.
802.11s
Which IEEE 802.11 standard and which wireless access point grade can support security management frames?
802.11w Enterprise-grade
This IEEE standard defines VLANs.
802.1Q
Which IEEE standard does PoE fall under?
802.3 Ethernet
Which IEEE ratified amendments were defined in 2012? Choose two. A) 802.3af B) 802.11.af C) 802.11at D) 802.3at E) 802.1at F) 802.1af
A) 802.3af D) 802.3at Note, it is also called PoE+
How many data bits does serial communication transmit at a time? A. 1 B. 3 C. 4 D. 8
A. 1
WLAN controllers may contain which of the following features? (Choose three.) A. Centralized administration B. Captive portal C. Network Address Translation (NAT) D. Built-in RADIUS services E. IP routing
A. Centralized administration B. Captive portal D. Built-in RADIUS services
Which component is required for a successful installation and operation of an 802.11ac wireless USB adapter? A. Device driver B. Client utility C. Profile software D. Windows AutoConfig
A. Device driver
A controller-managed access point connected to a port on the WLAN controller and not to an intermediate device is considered to have which of the following? A. Direct connectivity B. Distributed connectivity C. Decentralized connectivity D. Centralized connectivity
A. Direct connectivity
Access points work at which layers of the OSI model? (Choose two.) A. Layer 1 B. Layer 2 C. Layer 3 D. Layer 4 E. Layer 5 F. Layer 6 G. Layer 7
A. Layer 1 B. Layer 2
Which of the following devices is an in-line device that will inject DC voltage into the Ethernet cable? A. Midspan B. Midpoint C. Endspan D. Endpoint
A. Midspan
A device driver can be used in wireless networking. Which is an example of a device driver? A. Software to control a wireless NIC B. Software to control the operating system C. Hardware to install a PCI card D. Hardware to install a client bridge
A. Software to control a wireless NIC
Enterprise access points may contain which of the following features? (Choose three.) A. WPA 2.0 support B. RADIUS server C. Static output power D. Repeater mode E. Power sourcing equipment
A. WPA 2.0 support B. RADIUS server D. Repeater mode
How does the book define a consumer-grade access point?
Access points that are usually equipped with an Internet port, several ports for Ethernet connections, and a wireless access point.
Which devices are abbreviated by the initialism STA?
According to the IEEE 802.11 standard all wireless devices, including access points.
A self-contained unit with all the intelligence necessary to provide devices with wireless access to a wired network infrastructure and access to the resources the devices have permission to use.
Autonomous access point
Supported by WPA and WPA 2.0, RADIUS utilizes which type of authentication? A) 802.1X/WPA B) 802.1X/EAP C) 802.11X/WPA D) 802.11X/EAP E) 802.11AX/WPA F) 802.11AX/EAP
B) 802.1X/EAP
Enterprise-grade access points commonly include three types of antennas, choose the correct antennas from this list: A) Multi-directional B) Semi-directional C) Omnidirectional D) Mostly directional E) Highly directional F) Half-directional
B) Semi-directional C) Omnidirectional E) Highly directional
Which of these statements is true? Choose two. A) All SOHO-grade access points have adjustable RF output power B) Some SOHO-grade access points have adjustable RF output power C) Some consumer-grade access points have adjustable RF output power D) All enterprise-grade access points have adjustable RF output power E) All consumer-grade access points have adjustable RF output power
B) Some SOHO-grade access points have adjustable RF output power D) All enterprise-grade access points have adjustable RF output power
A wireless workgroup bridge will allow you to do which of the following? A. Connect two WLAN NICs together B. Connect a wired LAN to an access point C. Connect a PCI card to a WLAN D. Connect two client bridges
B. Connect a wired LAN to an access point
Which is required in order to successfully install an IEEE 802.11ac WLAN adapter? A. Security profile B. Device driver C. Third-party client utility D. SOHO utility
B. Device driver
Which of the following are benefits of a wireless repeater? (Choose two.) A. Higher data transfer rate. B. Larger cell size allows more devices to access the medium. C. Smaller cell size allows fewer devices to access the medium. D. Less data throughput. E. Extends cell size.
B. Larger cell size allows more devices to access the medium. E. Extends cell size.
Wireless bridges must be configured with ____________and____________. (Choose two.) A. A null SSID B. The same SSID C. The same RF channel D. Channel scanning E. Wired Equivalent Privacy
B. The same SSID C. The same RF channel
Which WLAN adapter can be installed in a computer without the need to disassemble the computer in any way? A. PCI B. USB 3.0 C. PCIe D. Mini-PCI
B. USB 3.0
You want to connect a desktop computer to an IEEE 802.11ac wireless network. Which WLAN adapter would be the best solution if you do not want to disassemble the computer? A. Mini-PCI B. USB 3.0 C. Half Mini-PCIe D. PCMCIA
B. USB 3.0
Most manufacturers recommend installing a wireless IEEE 802.11ac USB adapter at what point? A. When the computer is not powered on B. When instructed by the setup utility C. After calling technical support D. Before starting the setup process
B. When instructed by the setup utility
A self-contained intelligent access point is ____________. A. Controller-managed B. Heavyweight C. Autonomous D. Thin
C. Autonomous
Which access point mode involves connecting the access point to a distribution system for user access to the LAN? A. Bridge-only mode B. Repeater-only mode C. Root access point mode D. Access mode
C. Root access point mode
Different from autonomous access points, these access points are used with hardware WLAN controllers but not as stand-alone devices.
Controller-managed access points
IP addresses are logical addresses on which layer of the OSI model? A) Transport B) Data-Link C) Internet D) Network E) Session
D) Network Note, the Internet Layer is from the TCP/IP Model
Enterprise-grade IEEE 802.11n/ac client utilities typically contain which advanced feature? A. PCI configuration B. Spectrum analyzer C. Setup wizard D. Site survey
D. Site survey
In computer network terminology, the definition of half-duplex is closest to which of the following? A. One-way communication only B. One-way communication one way at a time C. Two-way communication both directions simultaneously D. Two-way communication one way at a time
D. Two-way communication one way at a time
You have a notebook computer and wish to connect to an IEEE 802.11ac wireless network. The computer does not have a built-in WLAN card or a PC card interface. You do not want any peripherals connected to the notebook that use wires and do not want to disassemble the computer. Which wireless adapter would be the best solution? A. Wireless PCI B. Wireless PCMCIA C. Wireless Full Mini-PCIe D. Wireless USB 2.0
D. Wireless USB 2.0
____________________ delivers DC power directly over the same wire pairs that carry data over the unused wire pairs.
Endpoint injector
List the three interfaces typically available on a wireless branch router/remote access point.
Ethernet port(s) Internet port to connection to the WAN or an Internet connection Wireless port to allow IEEE 802.11 computers and devices to connect to a network through a wireless connection
True or false, SOHO-grade access points usually have a more extensive feature set than enterprise-grade access points.
False
True or false, PoE spends AC voltage and computer data over the same Ethernet cable, enabling a device to receive AC power and computer data simultaneously.
False, DC power
True or false, In a full mesh network all nodes connection together with one path for every node.
False, full mesh needs at least two paths for every node.
True or false, Centralized data forwarding reduces the amount of infrastructure traffic because the controller-managed access point is able to make more decisions, taking some of the load away from the wireless controller.
False, this describes distributed data forwarding
True or false, consumer-grade access points are typically equipped with NAT, DHCP, DNS services, and wireless repeater functionality.
False, wireless repeater functionality is typically not a feature of consumer-grade access points.
Identify the two configuration methods for access points.
GUI CLI
Which communication amendments are commonly supported by consumer and SOHO-grade access points?
IEEE 802.11b IEEE 802.11g IEEE 802.11n IEEE 802.11ac
SOHO-grade access points also provide more advanced security features, such as user-based authentication ___________________ and _____________________.
IEEE 802.1X/EAP VPN pass-through
Which Layer of the OSI model do wired Ethernet repeaters function?
Layer 1
Which Layer of the OSI model do wireless Ethernet repeaters function?
Layer 2
If a user with a wireless client device moves from one radio cell to another and maintains connectivity, ___________ occurs.
Layer 2 transition (roaming)
This operation mode for enterprise-grade access points connects access points together wirelessly without the use of a wired infrastructure.
Mesh Mode
_____________________ injects DC power into the Ethernet cable over the unused wire pairs or over the data pairs, depending on the version of the standard in use.
Midspan injector
Identify three of the four PCI card types, as they're generally listed i.e. not worrying about the stupid IA, IB, types
Mini-PCI Mini-PCIe Full Mini-PCIe Half Mini-PCIe
_________________ is an extension to the IEEE 802.3 Ethernet standard that allows direct current voltage to be supplied over Ethernet cable to wireless access points.
Power over Ethernet
RF coverage is also known as the __________
RF cell or basic service area (BSA)
This advanced security feature allows for small- to medium-sized businesses to provide their own advanced authentication features without the need of an external server.
Remote Authentication Dial-In User Service (RADIUS)
The default operation mode for enterprise-grade access points.
Root Access Point Mode
This operation mode involves connecting the access point to a distribution system.
Root Access Point Mode
The logical name of a WLAN is
SSID
True of false: Full-duplex allows two-way communication to occur between devices simultaneously
True
True or false, A cell is the area of RF coverage of the transmitter
True
True or false, Firewalls can be hardware-based, software-based, or a combination of the two.
True
True or false, It is common for SOHO-grade access points to be able to act as DHCP servers.
True
True or false, direct access point connectivity is defined as a direct connection to ports on the switch and is typically used with device connection layer hardware wireless controllers.
True
True or false, A wireless branch router/remote access point can build a Layer 3 VPN tunnel between devices allowing the router on each side will act as a VPN endpoint.
True, they can also be configured as a VPN pass-through device
What allows an administrator the ability to separate physical ports into logical networks?
VLAN technology
The Wi-Fi Alliance certifications include several standards for security and QoS listed in the chapter, name them.
WPA/WPA 2.0 for security WMM and WMM-PS for QoS
In December 2011, a security flaw was reported with _______
WPS
Cloud-managed access points are able to function on their own should connectivity with the controller be temporarily lost, the description of this technology includes the term:
adaptive access point
A common feature in hardware WLAN controllers and cloud-managed systems that is used to obtain payment information, a simple agreement to terms and conditions for a hotspot or account credentials.
captive web portal
WLAN controller solutions consist of two common types of architectures, name them.
centralized (split-MAC) distributed
In WLAN controllers and cloud-managed controller-less solutions, this gives an administrator complete control over the wireless network from a single physical location.
centralized administration
Identify three popular types of autonomous access points:
consumer SOHO enterprise
If one connects access points that are not directly plugged into a port on the WLAN controller, they are using a feature known as ______________________
distributed access point connectivity
Identify the two ways that power sourcing equipment deliver power to the device.
endpoint injector midspan injector
Which grade of access points allow the user to change the transmit power?
enterprise and some SOHO
Controller-managed access points are centrally managed from the _____________ _______________ ______________.
hardware WLAN controller
When a wireless device is connected to an access point, it is known to be in _____________ mode.
infrastructure mode
In infrastructure mode, what happens to wireless data traffic that passes through an access point?
it is passed through to it's intended destination, crazy huh
According to the PoE amendments, what is the term for an apparatus that delivers power?
power sourcing equipment (PSE)
According to the PoE amendments, what is the term for an apparatus that receives power?
powered device (PD)
What are the two types of midspan devices?
single-port and multiport injectors
10BaseT and 100BaseT implementations use ______ pair(s) of wire(s) to carry data.
two
Half-duplex is defined as a ______-way communication that occurs in _______ direction at a time.
two one
Replacing an antenna on a wireless access point will also change the __________ and ________________ beamwidths
vertical horizontal
What allows a variety of wireless client devices to access any network resources that the device or user may have permissions for?
wireless access points
This device can be used to extend a corporate network to a remote location through a secure connection using a WAN or the Internet.
wireless branch router or remote access point, the book uses both terms
What is the typical RF transmit power of a SOHO-grade access point?
15 dBm or 32 mW
What is a wireless bridge?
The ability to connect two or more wired LANs together wirelessly using IEEE 802.11
This operation mode for enterprise-grade access points can act to extend the RF cell.
Wireless Repeater Mode
This operation mode for enterprise-grade access points can connect two or more LANs.
Wireless Bridge Mode
Mesh Mode has made this obsolete.
Wireless Distribution System (WDS)
A ________ will help determine and have the potential to mitigate certain levels of wireless intrusions or attacks on the network.
Wireless Intrusion Prevention Systems (WIPS)
What can help detect a rogue access point?
Wireless Intrusion Prevention Systems (WIPS)
Separating the intelligence from the access point and placing it into the wireless controller can cause ______________ with the higher data rates of IEEE 802.11n and 801.11ac
bottlenecks
