- (Topic 6)
A network technician is connecting three temporary office trailers with a point-to-multipoint microwave radio solution in a wooded area. The microwave radios are up and the network technician can ping devices in all office trailers, however, connectivity is sporadic. Which of the following is MOST likely the cause of this issue?
Correct Answer:
C
- (Topic 6)
Which of the following is an invalid MAC address?
Correct Answer:
C
- (Topic 6)
Several users at an adjacent office building report connectivity issues after a new building was built in between the two offices. The network technician has determined the adjacent office building is connected to the main office building via an 802.11ac bridge. The network
technician logs into the AP and confirms the SSID, encryption and channels are all correct. Which of the following is MOST likely the cause of this issue?
Correct Answer:
D
- (Topic 6)
The Transport Layer of the TCP/IP model corresponds to which of the following layers of the OSI model?
Correct Answer:
C
CORRECT TEXT - (Topic 4)
Wireless network users recently began experiencing speed and performance issues after access point 2 (AP2) was replaced due to faulty hardware. The original network was installed according to a consultant's specifications and has always worked without a problem.
You, a network technician, have been tasked with evaluating the situation and resolving the issues to improve both performance and connectivity. Refer to the following diagram and perform any NECESSARY changes to the wireless and wired infrastructure by adjusting devices.
Note: Adjust the LEAST number of devices needed to fix the issue, all blue icons in the image are clickable. When you feel the simulation is complete please select the Done button.
< ><>< ><>< ><>< ><>< ><>< >
Solution:
Since we know that the network was running perfectly before replacing AP2 we should start by looking at this new device thatwas used to replace the old one. Here we see that the other AP’s have hard coded the speed and duplex settings to 100/full, while AP2 is set to auto/auto.
Also, the other AP’s have been configured to use 802.11G, while AP2 is using 802.11B. Finally the channel that AP2 is using overlaps with AP1 which can cause problems. Channels 1, 6, and 11 are spaced far enough apart that they don’t overlap. On a non- MIMO setup (i.e. 802.11 a, b, or g) you should always try to use channel 1, 6, or 11. Since AP1 is using1, and AP3 is using 11, AP2 should be using 6.
References:
Dulaney, Emmett and Mike Harwood, CompTIA Network+ Authorized Exam Cram, Fourth Edition, Pearson, Indianapolis, 2012, p 269.
Lammle, Todd, CompTIA Network+ Deluxe Study Guide, Deluxe Edition, Wiley Publishing,
Inc., Indianapolis, 2009, pp 676, 677. http://en.wikipedia.org/wiki/List_of_WLAN_channels#2.4.C2.A0GHz_.28802.11b.2Fg.2Fn.2 9
Does this meet the goal?
Correct Answer:
A
