WTN - Class # 1

Question 1

• is in charge of international frequency coordination
• sets international standards for what
  users can do with a radio transmitter
• manages and regulates frequencies, power levels and transmission methods
• helps to guide the growth and expansion by wireless users

Answer 1

ITU-R - International Telecommunication Union Radiocommunication Sector

Question 2

• USA based agency
• oversees various aspects of
  communications, including radio, television, wire, satellite,
  and cable
• allocates radio frequencies and licences to broadcasters and telecommunications companies

Answer 2

FCC - Federal Communications Commission

Question 3

• creates standards for compatibility and coexistence between networking equipment
• responsible for the creation of all the 802 standards
• standards must adhere to the rules of the communications organisations, such as the FCC

Answer 3

IEEE - Institute of Electrical and Electronics Engineers

Question 4

• develops internet standards, protocols, and technical specifications
• responsible for the development of TCP/IP, HTTP and SMTP
• The results of their work are published as Request for Comments
  (RFC) documents

Answer 4

IETF - Internet Engineering Task Force

Question 5

• performs certification testing
  ensures interoperability between different wi-fi devices and equipment
• is also involved in enhancing wifi security protocols

Answer 5

Wi-Fi Alliance

Question 6

What is an access point according to the 802.11 standard?

Answer 6

The connection point for both sending out and receiving wireless radio signals that then are physically joined to an organization’s LAN

Question 7

• the high speed backbone of the network
  fastest routing switches are used
• carry large amounts of data between key data centres or distribution areas
• redundant solutions are usually designed at this layer to ensure fast and reliable delivery of packets

Answer 7

Core Layer

Question 8

• directs traffic of the network toward the smaller clusters of nodes
• routes traffic between VLANs and subnet
• wireless bridges are typically deployed in this layer of the network

Answer 8

Distribution Layer

Question 9

• responsible for slower delivery of the traffic directly to the end user or end node
• 802.11 wireless routers are usually placed in this layer

Answer 9

Access Layer

Question 10

Involves information sharing in one direction

Answer 10

Simplex

Question 11

Involves information sharing in both directions but one direction at a time

Answer 11

Half Duplex

Question 12

Involves information sharing in both directions at the same time

Answer 12

Full Duplex