AMK_C393-08 Wireless & SOHO Networks

802.11a, b, g, n, ac

What are the common 802.11 standards?

1. Get a map 2. Locate your servers 3. Identify where client computers will be. 4. Locate network resources. 5. Determine how you are going to connect. 6. Designate additional connectivity area if needed.

Keys steps for planning a network

Unidirectional and bidirectional

What are the two types of satellite connections?

POTS = Plain old telephone service

What is POTS?

RADIUS = Remote Authentication Dial-in User Service server to handle the Enterprise WPA2 encryption over a wireless connection

What is RADIUS?

The amount of delay a network can experience

What is latency in a network?

Infrared

Which of the following wireless communication methods has an operational range of 1 meter with a viewing angle of 30 degrees?

70 channels

How many channels does the Bluetooth protocol divide its operating band?

DSL = Digital Subscriber Line

What is DSL?

Class 1 = 100 meters (300 feet) Class 2 = 10 meters (33 feet) Class 3 = 1 meter (3 feet)

What is the maximum distance to which the Bluetooth technology can transmit data?

GSM and CDMA are 3G technologies.

Which of the following are 3G technologies? Each correct answer represents a complete solution. Choose all that apply. A: CDMA B: GSM C: LTE D: WiMAX

WiMax and LTE are the two current 4G cellular technologies.

Which of the following are 4G technologies? Each correct answer represents a complete solution. Choose all that apply. A: CDMA B: GSM C: LTE D: WiMAX

1, 6, and 11

You are installing a single 802.11g wireless network. The office space is large enough that you need three WAPs. What channels should you configure the WAPs on to avoid communication issues?

AES = Advanced Encryption Standard Used in WPA2 encryption security.

What is AES?

LTE = Long-Term Evolution max speeds: download 10-20Mbps and upload speeds of 3-10Mbps.

What is LTE?

802.1x authentication / protocol

Which authentication is required with WPA?

Quality of Service (QoS) Packet Scheduler

Which feature optimizes network traffic on the network connection page?

Basic rate interface ISDN (BRI ISDN) provides two separate 64 Kbps B channels for data transmissions. These channels can be combined to increase throughput.

Which of the following broadband technologies provides two dedicated, digital data channels that can be combined for greater throughput?

ADSL = Asymmetrical Digital Subscriber Line

What is ADSL?

FTTH = Fiber-to-the-Home service Is 100% fiber from data center to your home Max speeds 75 Mbps download and upload.

What is FTTH?

FTTN = Fiber-to-the-Node AKA: Fiber to the Curb. The ISP runs fiber to the phone/cable utility box near the street and then runs copper from there to your house. Max speed is 25 Mbps.

What is FTTN?

GSM = Global System for Mobile Communications is the most popular cellular phone standard in the world. 3G network.

What is GSM?

WAP = Wireless Access Point

What is WAP?

The 802.11g speed is 54 Mbps in the 2.4 GHz frequency using OFDM or DSSS encoding. "Maximum distance: indoors 125 feet; outdoors 460 feet"

What is the bandwidth of 802.11g?

802.11a and 802.11n

Which Wi-Fi networking standards operate in the 5 GHz frequency?

2.45 GHz

At which band does Bluetooth technology operate?

Unlicensed National Information Infrastructure (UNII)

What is UNII?

The 802.11ac speed is 6,900 Mbps, but most devices can get to about 1,300 Mbps. Common maximum speed is just under a Gigabit Ethernet speed at around 800Mbps.

What is the bandwidth of 802.11ac?

DSL and analog modem connections

Which dial-up internet connections use a standard RJ-11 telephone jack to establish a connections between the modem and the ISP?

Satellite

Which internet connection has a line-of-sight requirement?

Levels of Quality of Service (QoS) 0 = Best Effort 1 = Background 2 = Standard 3 = Excellent load 4 = Controlled load 5 = Interactive voice and video 6 = Layer 3 network control reserved traffic (less than 10 ms latency) 7 = Layer 2 network control reserved traffic (lowest latency)

Levels of Quality of Service (QoS)

Carrier Sense Multiple Access/Collision Avoidance (CSMA/CA) access method instead of Ethernet's Carrier Sense Multiple Access/Collision Detection (CSMA/CD)

What access method does the 802.11 network use?

The use of a RADIUS authentication server

What does the use of WPA-Enterprise require?

The ISDN channel that carries 64 Kbps of data; aka: Bearer channel

What is B channel?

Basic Rate Interface (BRI) "An ISDN line with 2 B channels and 1 D channel. Each B channel can be used separately for voice and/or data transmissions."

What is BRI?

CCMP = Counter Mode CBC-MAC Protocol Used in WPA2 encryption protocol

What is CCMP?

CDMA = Code division multiple access is the cellular phone standard that can only be accessed from US. 3G network.

What is CDMA?

The media access method used by IEEE 802.11 wireless networking.

What is Carrier Sense Multiple Access/Collision Avoidance (CSMA/CA)?

Direct-sequence spread spectrum (DSSS) is signal modulation technique used in the 802.11 standard. Accomplishes comms by adding the data that is to be transmitted to a higher-speed transmission, which contains redundant information to ensure data accuracy.

What is DSSS?

Frequency-hopping spread spectrum (FHSS) is signal modulation technique used in the 802.11 standard. Accomplishes comms by hopping the transmission over a range of predefined frequencies and is a single channel to both ends.

What is FHSS?

Orthogonal Frequency division multiplexing (OFDM) is signal modulation technique used in the 802.11 standard. Accomplishes comms by breaking the data into sub-signals and transmitting them simultaneously. These occur on different frequencies or sub-bands.

What is OFDM?

Service-Set Identifier (SSID) is a fancy term for the wireless network's name.

What is SSID?

TKIP = Temporal Key Integrity Protocol TKIP uses a 128-bit dynamic per packet key. It generates a new key for each packet sent.

What is TKIP?

WEP = Wired Equivalent Privacy First encryption method for Wireless comms. It uses a static key. The keys are commonly 10, 26, 58 hexadecimal characters long. "An old security protocol developed for Wi-Fi which has a security flaws and is easily compromised"

What is WEP?

WPA2 = Wi-Fi Protected Access 2 = 802.11i (lowercase i ) Is a huge improvement over WEP and WPA.It uses Counter Mode CBC-MAC Protocol (CCMP), which is based on the Advanced Encryption Standard (AES) security algorithm. "The strongest wireless encryption method currently available for 802.11 networks."

What is WPA2?

WPA = Wi-Fi Protected Access or Wireless Protected Access Was the first encryption to use the IEEE security specifications. and used the TKIP. WPA also introduced message integrity checking. "An enhancement of 802.11 encryption that secures Wi-Fi communications using TKIP encryption"

What is WPA?

Wi-Fi = Wireless Fidelity Originally coined as a marketing name for 802.11b, it's now used as a nickname referring to the family IEEE 802.11 standards.

What is Wi-Fi?

When communication channels are combined to increase throughput

What is bonding?

The signaling channel of an ISDN circuit; also referred to as the Delta channel.

What is the D channel?

The original 802.11 speed is -> 1 Mbps or 2 Mbps using the 2.4 GHz frequency.

What is the bandwidth of 802.11 standard?

The 802.11a speed is -> up to 54 Mbps in the 5 Ghz frequency spectrum. Encoding system used OFDM instead of FHSS or DSSS. Maximum distance: indoors 150 feet; outdoors 390 feet.

What is the bandwidth of 802.11a?

The 802.11b speed is 11 Mbps (with fallback rates of 5.5, 2, and 1 Mbps) in the 2.4 Ghz range and uses the DSSS data encoding. Maximum distance: indoors 150 feet; outdoors 460 feet

What is the bandwidth of 802.11b?

The 802.11n speed is 600 Mbps, but in reality the typical throughput is about 300 Mbps to 450 Mbps. and works on both the 2.4 GHz and 5 GHz ranges. "Maximum speed promised is 130-150 Mbps without channel bonding; 300 Mbps with channel bonding" "Maximum distance is: indoors 230 feet; outdoors 820 feet"

What is the bandwidth of 802.11n?

A semi-public network segment located between a perimeter router and an internal router on your network. Used for web servers, FTP servers, and email relay servers.

What is the demilitarized zone (DMZ)?

Max speeds: downloads at 10- 15Mbps and uploads at 1 - 2Mbps. AKA: Line-of-sight wireless

What is the max speed of a Satellite Internet connection?

To prevent unauthorized devices from connecting to the wireless network

What is the purpose of MAC filtering on a wireless network?

It allows you to limit the bandwidth available for data based on the protocol used, the IP address, or other parameters.

What is the purpose of Quality of Service (QoS)?

Configure the SSID and decide which encryption standard to use.

What should you configure when setting up a wireless connection?

ISDN = Integrated Systems Digital Network supports data transfer rate up to -> 128 Kbps.

What speed does ISDN support?

802.11g

Which of the following 802.11 standards works in the 2.4 GHz band, provides maximum bandwidth of 54Mbps, and uses orthogonal frequency-division multiplexing (OFDM) based transmission?

A PRI ISDN uses 23 B channels.

Which of the following broadband technologies provides 23 dedicated, digital data channels that can be combined for greater throughput?

802.11 wireless protocol

Which protocol is used by Wireless Fidelity (Wi-Fi) networks?

Propagation delay

Which term, apart from latency, is used for a delay that occurs in satellite connections?

802.11b, 802.11g and 802.11n

Which three Wi-Fi networking standards operate within the 2.4 GHz radio frequency band?

The two technologies that 802.11ac employs to achieve high throughput are channel bonding and MIMO. Channel bonding is the combination of multiple smaller channels into one large channel for greater bandwidth. MIMO is enhanced over 802.11n to allow more multiple inputs and outputs. 802.11ac also uses beamforming, but that helps the range, not the throughput.

Which two of the following are features that allow 802.11ac to achieve higher data throughput? (Choose two.)

WEP and WPA

Which two protocols provide encrypted comms between 802.11x wireless clients and wireless access points?

The 802.11a and 802.11g wireless networks

Which two wireless networks provide a data throughput of 54 megabits and uses orthogonal frequency-division multiplexing (OFDM encoding?

Infrared

Which type of light is used for line-of-sight wireless communications for local area networks?

Point-to-Point

Which type of topology is used to connect devices with each other by using Bluetooth?

Radio frequency interference (RFI)

Which type of wireless network interference is caused by competing wireless signals?