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시험 번호/코드: 640-822
시험 이름: Cisco (Interconnecting Cisco Networking Devices Part 1)
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Q&A: 350 문항
업데이트: 2013-11-28
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NO.1 A host computer has the IP address 192.168.43.139 and netmask 255.255.255.240. On which logical
IP network does this host reside?
A.192.168.0.0/26
B.192.168.0.0/28
C.192.168.43.0/28
D.192.168.43.64/28
E.192.168.43.112/28
F.192.168.43.128/28
Answer:F
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NO.2 An Ethernet cable is attached to a PC NIC and then attached to a switch port. The PC power is turned
on and the switch port link LED turns green. The link light indicates what two conditions? (Choose two.)
A.Layer 2 communication has been established between the PC and switch.
B.The PC has received a DHCP address.
C.Traffic is being sent from the switch to the PC.D.If flashing, the green LED indicates port speed of 100
Mb/s.
E.The Layer 1 media is functioning between the PC and switch.
F.The switch port is functioning as a half-duplex connection.
Answer:AE
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NO.3 Which OSI layer header contains the address of a destination host that is on another network?
A.application
B.session
C.transport
D.network
E.data link
F.physical
Answer:D
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NO.4 Refer to the topology and switching table shown in the graphic. Host B sends a frame to Host C. What
will the switch do with the frame?
A.drop the frame
B.send the frame out all ports except port 0/2
C.return the frame to Host B
D.send an ARP request for Host C
E.send an ICMP Host Unreachable message to Host B
F.record the destination MAC address in the switching table and send the frame directly to Host C
Answer:B
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NO.5 Refer to the exhibit.
A network device needs to be installed in the place of the icon labeled Network Device to accommodate a
leased line attachment to the Internet. Which network device and interface configuration meets the
minimum requirements for this installation?
A.a router with two Ethernet interfaces
B.a switch with two Ethernet interfaces
C.a router with one Ethernet and one serial interface
D.a switch with one Ethernet and one serial interface
E.a router with one Ethernet and one modem interface
Answer:C
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NO.6 Which three statements are true about the operation of a full-duplex Ethernet network? (Choose three.)
A.There are no collisions in full-duplex mode.
B.A dedicated switch port is required for each full-duplex node.
C.Ethernet hub ports are preconfigured for full-duplex mode.
D.In a full-duplex environment, the host network card must check for the availability of the network media
before transmitting.
E.The host network card and the switch port must be capable of operating in full-duplex mode.
Answer:ABE
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NO.7 What is the subnet address for the IP address 172.19.20.23/28?
A.172.19.20.0
B.172.19.20.15
C.172.19.20.16
D.172.19.20.20
E.172.19.20.32
Answer:C
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NO.8 Refer to the exhibit.
An administrator replaced the NIC in a desktop PC with a new NIC. The NIC in the PC configuration is set
to "100 Mb Half." Now the PC has intermittent connectivity and loss of communication so the
administrator began troubleshooting on the switch. Using the switch output shown, what is the cause of
the problem?
A.Input flow control is off.
B.Encapsulation is set to ARPA.
C.The switch is set to full-duplex.
D.The port is administratively down.
E.Fast Ethernet is incompatible with a megabit NIC.
F.The counters were not cleared after the hardware was replaced.
Answer:C
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NO.9 Which two statements describe the operation of the CSMA/CD access method? (Choose two.)
A.In a CSMA/CD collision domain, multiple stations can successfully transmit data simultaneously.
B.In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting.
C.The use of hubs to enlarge the size of collision domains is one way to improve the operation of the
CSMA/CD access method.
D.After a collision, the station that detected the collision has first priority to resend the lost data.
E.After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired,
all stations have equal priority to transmit data.
F.After a collision, all stations involved run an identical backoff algorithm and then synchronize with each
other prior to transmitting data.
Answer:BE
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NO.10 Refer to the topology and MAC address table shown in the exhibit. Host A sends a data frame to host D.
What will the switch do when it receives the frame from host A?
A.The switch will add the source address and port to the MAC address table and forward the frame to
host D.B.The switch will discard the frame and send an error message back to host A.C.The switch will
flood the frame out of all ports except for port Fa0/3.
D.The switch will add the destination address of the frame to the MAC address table and forward the
frame to host D.
Answer:A
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NO.11 Refer to the exhibit.
All devices attached to the network are shown. How many collision domains are present in this network?
A.2
B.3
C.6
D.9
E.15
Answer:E
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NO.12 What is the maximum number of bits that can be borrowed to create subnets if a Class B network
address is being used?
A.2
B.6
C.8
D.14
E.16
Answer:D
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NO.13 Refer to the exhibit. The ports that are shown are the only active ports on the switch. The MAC
address table is shown in its entirety. The Ethernet frame that is shown arrives at the switch.
What two operations will the switch perform when it receives this frame? (Choose two.)
A.The MAC address of 0000.00aa.aaaa will be added to the MAC address table.
B.The MAC address of 0000.00dd.dddd will be added to the MAC address table.
C.The frame will be forwarded out port fa0/3 only.
D.The frame will be forwarded out fa0/1, fa0/2, and fa0/3.
E.The frame will be forwarded out all the active ports.
Answer:AD
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NO.14 Refer to the exhibit. A network administrator has configured a Catalyst 2950 switch for remote
management by pasting into the console the configuration commands that are shown in the exhibit.
However, a Telnet session cannot be successfully established from a remote host. What should be done
to fix this problem?
A.Change the first line to interface fastethernet 0/1.
B.Change the first line to interface vlan 0/1.
C.Change the fifth line to ip default-gateway 192.168.17.241.
D.Change the fifth line to ip route 0.0.0.0 0.0.0.0 192.168.17.1.
E.Change the sixth line to line con 0.
Answer:C
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NO.15 From which IP address class can 15 bits be borrowed to create subnets?
A.A
B.B
C.C
D.D
E.E
Answer:A
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NO.16 Which of the following describes the roles of devices in a WAN? (Choose three.)
A.A CSU/DSU terminates a digital local loop.
B.A modem terminates a digital local loop.
C.A CSU/DSU terminates an analog local loop.
D.A modem terminates an analog local loop.
E.A router is commonly considered a DTE device.
F.A router is commonly considered a DCE device.
Answer:ADE
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NO.17 Refer to the exhibits labeled A through E. All devices are to be connected over Ethernet. Which three
device-to-device configurations are likely to require the use of a crossover connection? (Choose three.)
A.exhibit A
B.exhibit B
C.exhibit C
D.exhibit D
E.exhibit E
Answer:ADE
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NO.18 Refer to the exhibit. An administrator replaced the 10/100 Mb NIC in a desktop PC with a 1 Gb NIC
and now the PC will not connect to the network. The administrator began troubleshooting on the switch.
Using the switch output shown, what is the cause of the problem?
A.Speed is set to 100Mb/s.
B.Input flow control is off.
C.Encapsulation is set to ARPA.D.The port is administratively down.
E.The counters have never been cleared.
Answer:A
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NO.19 Refer to the exhibit.
Host A is sending a packet to Host B for the first time. What destination MAC address will Host A use in
the ARP request?
A.192.168.0.1
B.172.16.0.50
C.00-17-94-61-18-b0
D.00-19-d3-2d-c3-b2
E.ff-ff-ff-ff-ff-ff
F.255.255.255.255
Answer:E
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NO.20 An elementary school has a computer in every classroom. One entire wing of the school connects to a
centrally located hub. The teachers have reported a slowdown in the past few weeks to the network
administrator. The network administrator has analyzed the network and documented a steep increase in
utilization as the teachers use a new network-based classroom management application. Which solution
will improve the performance the most?
A.Replace the hub with a switch.
B.Install a repeater in the affected wing.
C.Reboot the router that connects to the hub.
D.Install a router and install another hub in the affected wing.
E.Ensure all devices in the affected wing have a default gateway.
Answer:A
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