IT 300 CH 6
For a local area network (LAN), the physical topology must always be the same as the logical
topology. - ✔✔FALSE
Select the correct statement(s) regarding peer-to-peer (P2P) networks.
%
Answers:
a. computers on P2P networks have a centralized location for all shared data
0
b. there is a possibility that duplicate data files will exist on a P2P network
c. P2P networks always use centralized authentication and access methods
0
d. all are correct statements - ✔✔b. there is a possibility that duplicate data files will exist on a P2P
network
1
Select the correct statement(s) regarding decentralized (distributed) access control on a LAN.
Answers:
a. no centralized access process exists, and therefore each connected station has the responsibility
for controlling its access
b. data collisions are possible, therefore mechanisms such as CDMA/CD are required
c. when a data collision occurs, the nearest station detecting the collision transmits a jamming signal
d. all of the above are correct - ✔✔d. all of the above are correct
, A shared IEEE 802.3 Ethernet LAN requires the CSMA/CD protocol to help avoid data collisions;
however, data collision can still occur. - ✔✔TRUE
An IEEE 802.11 wireless LAN (WLAN) does not share a common medium and therefore data
collisions are not possible. This is the reason why CSMA/CD is not used on WLANs. - ✔✔FALSE
%
Data collisions will not occur when implementing full-duplex (FDX) switched Ethernet. - ✔✔TRUE
The IEEE 802.3 Ethernet standard only describes the Data Link Layer of the OSI Reference Model.
Therefore, any physical medium can be used. - ✔✔FALSE
Select the correct statement(s) regarding the 802.3 MAC layer.
Answers:
a. The MAC layer resides in the data link layer 2, under the LLC layer
b. The MAC layer is where the 48 bit data link address resides
c. MAC is responsible for contention-based access (i.e., CSMA/CD or CSMA/CA)
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