JK0-022 Latest Exam Braindumps
Question 13: Users have been reporting that their wireless access point is not functioning. They state that itallows slow connections to the internet, but does not provide access to the internal network. The
user provides the SSID and the technician logs into the company's access point and finds no issues.
Which of the following should the technician do?
A. Change the access point from WPA2 to WEP to determine if the encryption is too strong
B. Clear all access logs from the AP to provide an up-to-date access list of connected users
C. Check the MAC address of the AP to which the users are connecting to determine if it is an
imposter
D. Reconfigure the access point so that it is blocking all inbound and outbound traffic as a
troubleshooting gap
Correct Answer: C
Explanation:
The users may be connecting to a rogue access point. The rogue access point could be hosting a
wireless network that has the same SSID as the corporate wireless network. The only way to tell for
sure if the access point the users are connecting to is the correct one is to check the MAC address.
Every network card has a unique 48-bit address assigned. A media access control address (MAC
address) is a unique identifier assigned to network interfaces for communications on the physical
network segment. MAC addresses are used as a network address for most IEEE 802 network
technologies, including Ethernet and WiFi. Logically, MAC addresses are used in the media access
control protocol sublayer of the OSI reference model. MAC addresses are most often assigned by the
manufacturer of a network interface controller (NIC) and are stored in its hardware, such as the
card's read-only memory or some other firmware mechanism. If assigned by the manufacturer, a
MAC address usually encodes the manufacturer's registered identification number and may be
referred to as the burned-in address (BIA). It may also be known as an Ethernet hardware address
(EHA), hardware address or physical address. This can be contrasted to a programmed address,
where the host device issues commands to the NIC to use an arbitrary address. A network node may
have multiple NICs and each NIC must have a unique MAC address. MAC addresses are formed
according to the rules of one of three numbering name spaces managed by the Institute of Electrical
and Electronics Engineers (IEEE): MAC-48, EUI-48, and EUI-64.
