640-802 CCNA Study Guide - Elktech.org

However, F0/5 corresponds to two MAC addresses in the same VLAN. Thus we know that Fa0/5
is connected to a Hub.
Cisco 640-802 Exam
Based on the output shown, there are multiple MAC addresses from different VLANs attached to
the FastEthernet 0/1 interface. Only trunks are able to pass information from devices in multiple
VLANs.
QUESTION NO: 397
A receiving host computes the checksum on a frame and determines that the frame is damaged.
The frame is then discarded. At which OSI layer did this happen?
A. physical
B. session
C. data link
D. transport
E. network
Answer: C
Explanation:
The Data Link layer provides the physical transmission of the data and handles error notification,
network topology, and flow control. The Data Link layer formats the message into pieces, each
called a data frame, and adds a customized header containing the hardware destination and
source address. Protocols Data Unit (PDU) on Datalink layer is called frame. According to this
question the frame is damaged and discarded which will happen at the Data Link layer.
QUESTION NO: 398
Two routers named Atlanta and Brevard are connected by their serial interfaces as shown in the
exhibit, but there is no data connectivity between them. The Atlanta router is known to have a
correct configuration. Given the partial configurations shown in the exhibit, what is the problem on
the Brevard router that is causing the lack of connectivity?
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