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Cisco Certified Network Associate : 640-802 Exam

640-802 CCNA
Cisco Certified Network Associate Exam

Exam Number: 640-802 CCNA
Associated Certifications: CCNA
Duration: 90 Minutes (50-60 questions)
Available Languages: English
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Exam Tutorial: Review type of exam questions

QUESTION 131:
The system LED is amber on a new PassGuide Catalyst 2950 series switch. What does
this indicate?
A. The system is powered up and operational.
B. The system is sensing excessive collisions.
C. The system is forwarding traffic.
D. The system is not powered up.
E. The system is malfunctioning.
F. None of the above
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Answer: E
Explanation:
While the switch powers on, it begins POST, a series of tests. POST runs automatically
to verify that the switch functions properly. When the switch begins POST, the system
LED is off. If POST completes successfully, the LED turns green. If POST fails, the LED
turns amber.
Note: POST failures are usually fatal. Call Cisco Systems if your switch does not pass
POST.
QUESTION 132:
Some of the older PassGuide switches store the entire frame before forwarding it to
the destination. What are two effects on network performance of configuring a
switch to do this? (Choose two)
A. Filtering of collision fragments only
B. Decreased latency
C. Increased latency
D. Filtering of all frame errors
E. Increase in switch operating speed
F. Propagation of corrupted or damaged frames
Answer: C, D
Explanation:
Switches that store the entire frame before forwarding to the destination are using the
store and forward process. This mode copies the entire frame into memory, computes the
Cyclic Redundancy Check (CRC) for errors, and then looks up the destination MAC
address and forwards the frame. This is slow but offers the best solution for error
correction without affecting the entire backbone in retransmission. This gives us the best
method for filtering errors from traversing the network, but at a cost of higher latency.
QUESTION 133:
The following output was displayed on a PassGuide device:
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While troubleshooting the installation of a new PassGuide LAN device, the command
output shown above was issued. What is the meaning of the output “MTU 1500
bytes” shown above?
A. The maximum number of bytes that can transverse this interface per second is 1500
B. The maximum segment size that can transverse this interface is 1500 bytes
C. The maximum packet size that can transverse this interface is 1500 bytes
D. The maximum frame size that can transverse this interface is 1500 bytes
Answer: C
Explanation:
Maximum transmission unit (MTU) defines the largest size of packets that an interface
can transmit without the need to fragment. IP packets larger than the MTU must go
through IP fragmentation procedures.
QUESTION 134:
A PassGuide Switch is connected as shown below:
Which IOS commands should you enter if you wanted to link the router PassGuide 1
with switch port 1? (Select three answer choices)
A. Switch(config)# interface fastethernet 0/1
B. Switch(config-if)# switchport mode access
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C. Switch(config-if)# switchport mode trunk
D. Switch(config-if)# switchport access vlan 1
E. Switch(config-if)# switchport trunk encapsulation isl
F. Switch(config-if)# switchport trunk encapsulation dot1q
Answer: A, C, F
Explanation:
Before you can begin, you have to get into the interface. Answer choice A is the only
command in the selection that puts the IOS into interface mode. Once in the interface you
have to set it to trunk mode, so choice C is correct. The switch port needs encapsulation.
Answer choice E give you the choice of ISL and choice F gives you dot1q. Since the
diagram suggests that the router is using 802.1Q, you must also use dot1q.
Incorrect Answers:
B, D: We wish to set up a trunk over this connection, not set up a single VLAN.
E. Both ends of the trunk must use the same trunk encapsulation type. Since the diagram
shows that the router is set to 802.1Q, the switch must be set up similarly.
QUESTION 135:
As a PassGuide trainee you are required to set the default gateway on a Cisco switch
to the IP address of 192.168.1.115. Which IOS command should you use?
A. CertK Switch(config)# ip route-default 192.168.1.115
B. CertK Switch(config)# ip default-gateway 192.168.1.115
C. CertK Switch(config)# ip route 192.168.1.115 0.0.0.0
D. CertK Switch(config)# ip default-network 192.168.1.115
E. None of the above
Answer: B