Testking 640-801的一些带有技巧及一些容易迷惑题归纳(陆续更新)

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以下是Testking 640-801的一些带有技巧及一些容易迷惑的题归纳如下：

Topic 1: Planning & Design
       Section 1: Design a simple LAN using Cisco Technology .

QUESTION NO 2:                  
Routers perform which of the following functions? (Select three)
A. Packet switching
B. Collision prevention on a LAN segment.
C. Packet filtering
D. Broadcast domain enlargement
E. Broadcast forwarding
F. Internetwork communication
Answer: A, C, F
Explanation:
A. Routers work in Layer 3 of the OSI Model. A major function of the router is to route
packets between networks.
C. Through the use of access lists, routers can permit and deny traffic using layer 3 and
layer 4 packet information.
F. The primary purpose of a router is to route traffic between different networks, allowing
for internetworking.
Incorrect Answers:
B. While routers can be used to segment LANs, which will reduce the amount of
collisions; it can not prevent all collisions from occurring. As long as there are 2 or more
devices on a LAN segment, the possibility of a collision exists, whether a router is used or
not.
D. The broadcast domain of a LAN is often segmented through the use of a router. This
results in reducing the size of the broadcast domain.
E. Routers do not forward broadcast traffic.


QUESTION NO: 3
Within the TestKing office, The Sales and Production networks are separated by a
router as shown in the diagram below:




Which of the following statements most accurately describes the characteristics of
the above networks broadcast and collision domains? (Select the two best answer
choices)
A. There are two broadcast domains in the network.
B. There are four broadcast domains in the network.
C. There are six broadcast domains in the network.
D. There are four collision domains in the network.
E. There are five collision domains in the network.
F. There are seven collision domains in the network.
      
Answer: A F              


QUESTION NO: 4
The Testking corporate LAN consists of one large flat network. You decide to
segment this LAN into two separate networks with a router. What will be the affect
of this change?
A. The number of broadcast domains will be decreased.
B. It will make the broadcasting of traffic between domains more efficient between
segments.
C. It will increase the number of collisions.
D. It will prevent segment 1's broadcasts from getting to segment 2.
E. It will connect segment 1's broadcasts to segment 2.
Answer: D
Explanation
A router does not forward broadcast traffic. It therefore breaks up a broadcast domain,
reducing unnecessary network traffic. Broadcasts from one segment will not be seen on
the other segment.
Incorrect Answers:
A. This will actually increase the number of broadcast domains from one to two.
B. All link level traffic from segment one to segment two will now need to be routed
between the two interfaces of the router. Although this will reduce the traffic on the LAN
links, it does also provide a less efficient transport between the segments.
C. Since the network size is effectively cut into half, the number of collisions should
decrease dramatically.
E. Broadcasts from one segment will be completely hidden from the other segment.






QUESTION NO: 9
The TestKing network is displayed in the diagram below:



Referring to the devices shown above, which statements are true in this scenario?
(Select two)
A. All the devices in both networks will receive a broadcast to 255.255.255.255 sent by
host TestKingA.
B. Only the devices in network 192.168.1.0 will recive a broadcast to 255.255.255.255 sent
by host TestKingA.
C. All the devices on both networks are members of the same collision domain.
D. The hosts on the 192.168.1.0 network form one collision domain, and the hosts on the
192.168.2.0 network form a second collision domain.
E. Each host is in a separate collision domain.
Answer: B, E
Explanation:
Since the devices shown in the diagram are switches, B is in fact correct. D is not correct.
If the diagram used hubs and not switches then yes, there would only be two collision
domains, but the diagram has switches. The author may have intended to state broadcast
domains which would have been correct as well.
Answer E is also correct, since the network is comprised of switches each host will be in a separate collision domain.


QUESTION NO:13
CDP is running between two TestKing devices. What information is supplied by
CDP? (Select three)
A. Device identifiers
B. Capabilities list
C. Platform
D. Route identifier
E. Neighbor traffic data

Answer:A B C




QUESTION NO:22
Refer to the exhibit. Two buildings on the San Jose campus of a small company must
be connected to use Ethernet with a bandwidth of at least 100 Mbps. The company is
concerned about possible problems from voltage potential differences between the
two buildings. Which media type should be used for the connection?


A. STP cable
B. coaxial cable
C. fiber optic cable
D. UTP cable
Answer: C




Section 2: Design an IP addressing scheme to meet design requirements

QUESTION NO: 42 DRAG DROP
TestKing has three locations and has plans to redesign the network accordingly. The
networking team received 192.168.126.0 to use as the addressing for entire network
from the administrator. After subnetting the address, the team is ready to assign the
address.
The administrator plans to configure ip subnet-zero and use RIP v2 as the routing
protocol. As a member of the networking team, you must address the network and at
the same time converse unused addresses for future growth.
Being mindful of these goals, drag the host addresses on the left to the correct router
interface. One of the routers is partially configured. Move the mouse over a router to
view its configuration (** This information is missing**). Not all of the host
addresses on the left will be used.





Answer:
Explanation:



TestKing1 Fa0/0 192.168.126.67/29
TestKing1 S0/0 192.168.126.49/30
TestKing 2 Fa0/0 and TestKing 3 Fa0/0 both can have either of the following
192.168.126.35/27 or 192.168.126.2/27




QUESTION NO: 46
Which of the following are true regarding a network using a subnet mask of
255.255.248.0? (Choose three)
A. It corresponds to a Class A address with 13 bits borrowed.
B. It corresponds to a Class B address with 4 bits borrowed.
C. The network address of the last subnet will have 248 in the 3rd octet.
D. The first 21 bits make the host portion of the address.
E. This subnet mask allows for 16 total subnets to be created.
F. The subnetwork numbers will be in multiples of 8.
Answer: A, C, F
Explanation:
This subnet mask includes the first 5 bits within the third octet, so for a class A address 13
bits will be used for the mask (8 bits in the second octet plus 5 in the third).
Since the first 5 bits are used in this octet, that means that remaining 3 bits in this octet
will be available for hosts, so each network will be a factor of 8, making the last available
subnet with a .248 in the third octet.


QUESTION NO: 66
The network with the IP address 172.31.0.0/19 is to be configured on the router with
the partial configuration shown in the graphic. Which of the following statements
describes the number of available subnets and hosts that will result from this
configuration?
Exhibit:

A. There are 7 usable subnets, with 2046 usable host addresses.
B. There are 8 usable subnets, with 30 usable host addresses.
C. There are 7 usable subnets, with 30 usable host addresses.
D. There are 8 usable subnets, with 2046 usable host addresses.
E. There are 7 usable subnets, with 8190 usable host addresses.
F. There are 8 usable subnets, with 8190 usable host addresses.
Answer: F


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