Chapter 6: Networks

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Chapter 1 Questions


1.

6 links : N(N-1)/2 = 4(4-1)/2 = 4*3/2 = 12/2 = 6


2.

Hub : Hubs operate at the physical layer (1) of the OSI and TCP models. All devices connected to a hub share bandwidth and are considered in the same Ethernet ‘broadcast domain’.


3.

Auto-configuration: Addresses begging with 169.254 are designated as Link Local addresses (RFC 3927), dynamicall configured by the local device as result of not obtaining a valid address via DHCP.


4.

(A)DSL: distance from client location to the provider facility is degraded over copper wire.


5.

PAN: Persona Area Network


6.

802.11a: Initially deployed (due to cost) primarily business environments. With penetration of 802.11n into the consumer market, wireless home APs have become available that support both the 802.11b/g (2.4 GHz) and 802.11a (5 GHz) frequencies.


7.

802.11n :the ‘n’ standard operates in both the 2.4 and 5 GHz frequency ranges.


8.

IEEE : Institute of Electrical and Electronics Engineers.


9.

TIA/EIA-568 – specifications drawn by the Telecommunications Industry Association.


10.

Connectivity – how devices connect to the LAN.


11.

Application – Web connectivity travels begins with a browser (at the Application layer) initiating a request which travels down the local computers Application and TCP/IP stack(s). The Application layer is the top layer (1) of the OSI networking model.


12.

100 meteres (328 feet)


13.

  1. Identify (the problem)
  2. Theory (of probable cause)
  3. Test (the theory)
  4. Plan of Action
  5. Verify (full system functionality)
  6. Document (the procedure and results)