Exam 8: Wireless Networking

____ is an 802.11n feature that allows two adjacent 20-MHz channels to be combined to make a 40-MHz channel.

____ may use either the 2.4-GHz or 5-GHz frequency range.

Satellite return Internet access is a(n)____ technology.

____ is a most significant problem for wireless communications because the atmosphere is saturated with electromagnetic waves.

A directional antenna issues wireless signals along a(n)____ direction.

A unique characteristic of the 802.11 data frame is its ____ field.

Places where wireless Internet access is available to the public are called ____________________.

MATCHING Match each item with a statement below: a.mobile wireless f.802.11b b.fixed wireless g.802.11a c.access point h.802.11g d.uplink i.802.11n e.downlink -Accepts wireless signals from multiple nodes and retransmits them to the rest of the network.

____ satellites are the type used by the most popular satellite Internet access service providers.

____________________ means that satellites orbit the Earth at the same rate as the Earth turns.