Comer 16

Two hosts communicating with each other directly without the use of an Access Point is called: base station nodes Wireless stations Ad hoc networking

Ad hoc networking

Which of the following are key features of WiMAX? (check all that apply) Uses unlicensed frequencies Can cover areas up to 10Km Can provide transmission speeds of up to 70Mbps full-duplex at closer range Allows for both Line-of-Sight (LOS) and Non-line-of-sight (NLOS) access.

Can cover areas up to 10Km Can provide transmission speeds of up to 70Mbps full-duplex at closer range Allows for both Line-of-Sight (LOS) and Non-line-of-sight (NLOS) access.

Which of the following are wireless network technologies? Wi-Fi routers at home Bluetooth LTE cellular data network Wi-Max used for mobile broadband

Correct! Wi-Fi routers at home Correct! Bluetooth Correct! LTE cellular data network Correct! Wi-Max used for mobile broadband

In practice, all cells are the same size.

False

The header of a wireless frame can only have one destination MAC address.

False

There are two classes of WiMAX, Mobile (802.16e) and Fixed (802.16d): Fixed WiMAX allows for hand-offs between access points and is used for Wireless broadband access to laptops and cell phones. Mobile WiMAX doesn't allow for hand-offs and is used for wireless broadband connections to buildings and houses.

False

Which of the following are true about RFID? (check all that apply) Has limited distance Short for Radio Frequency Identification Used to "tag" items and devices for inventory control, and detection, and embedding digital data.

Has limited distance Short for Radio Frequency Identification Used to "tag" items and devices for inventory control, and detection, and embedding digital data.

What is the term for using multiple frequencies to send data increasing performance and tolerating interference for wireless? Frequency Stacking Spread Spectrum Broadband Wide Area Network

Spread Spectrum

Which of the following are true about Infrared wireless technology? (check all that apply) Transmission is directional in a 30 degree cone Signal reflects off objects and cannot not go through them. Often used in remote controls Transmission range and speeds vary considerably but typical applications are seen at rates up to 16Mbps and distances around 5m

Transmission is directional in a 30 degree cone Signal reflects off objects and cannot not go through them. Often used in remote controls Transmission range and speeds vary considerably but typical applications are seen at rates up to 16Mbps and distances around 5m

Ideally, each cell tower forms a hexagon because the cells can be arranged in a honeycomb. In practice, cellular coverage is not perfect and transmits in a circular pattern.

True

Interference can be minimized if adjacent cells use different frequencies.

True

Most wireless LANs are set up so hosts connect to an access point which is connected to a switch/router.

True

The WiFi Alliance is a non-profit organization that certifies products based off of the IEEE 802.11 standard.

True

The government (FCC) regulates the frequencies in the electromagnetic spectrum that can be used for wireless communication.

True

Two different types of access points exist, cheap dumb ones that rely on the computer to choose when to change their association and expensive intelligent ones that coordinate with each other to provide smooth handoffs.

True

When a host is in range of two wireless access points, it must associate with a particular AP.

True

Wi-Fi stands for Wireless Fidelity.

True

Match the following PAN Technologies with their features or definitions: 802.15.1a 802.15.3a 802.15.4 Up to 721 Kbps @5m Uses 1 frequency band Uses 3 frequency bands Uses many frequency bands (spectrum) Used to replace cabling for peripherals Used for home automation and remote controlled devices Bluetooth Ultra wideband Zigbee

a. Bluetooth b. Ultra wideband c. Zigbee d. Bluetooth e. Bluetooth f. Zigbee g. Ultra wideband h. Bluetooth i. Zigbee

Wireless WAN technologies can be divided into two categories, Cellular and Metropolitan communications systems.

false