CCNA – Basic Questions 2
Here you will find answers to Basic Questions – Part 2
Question 1
What are some of the advantages of using a router to segment the network? (Choose two)
A. Filtering can occur based on Layer 3 information.
B. Broadcasts are eliminated.
C. Routers generally cost less than switches.
D. Broadcasts are not forwarded across the router.
E. Adding a router to the network decreases latency.
Answer: A D
Question 2
Which of the following statements describe the network shown in the graphic? (Choose two)
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
Explanation
Only router can break up broadcast domains so in the exhibit there are 2 broadcast domains: from e0 interface to the left is a broadcast domain and from e1 interface to the right is another broadcast domain -> A is correct.
Both router and switch can break up collision domains so there is only 1 collision domain on the left of the router (because hub doesn’t break up collision domain) and there are 6 collision domains on the right of the router (1 collision domain from e1 interface to the switch + 5 collision domains for 5 PCs in Production) -> F is correct.
Question 3
Refer to the exhibit. The two connected ports on the switch are not turning orange or green. What would be the most effective steps to troubleshoot this physical layer problem? (Choose three)
A. Ensure that the Ethernet encapsulations match on the interconnected router and switch ports.
B. Ensure that cables A and B are straight-through cables.
C. Ensure cable A is plugged into a trunk port.
D. Ensure the switch has power.
E. Reboot all of the devices.
F. Reseat all cables.
Answer: B D F
Explanation
The ports on the switch are not up indicating it is a layer 1 (physical) problem so we should check cable type, power and how they are plugged in.
Question 4
For what two purposes does the Ethernet protocol use physical addresses? (Choose two)
A. to uniquely identify devices at Layer 2
B. to allow communication with devices on a different network
C. to differentiate a Layer 2 frame from a Layer 3 packet
D. to establish a priority system to determine which device gets to transmit first
E. to allow communication between different devices on the same network
F. to allow detection of a remote device when its physical address is unknown
Answer: A E
Explanation
Physical addresses or MAC addresses are used to identify devices at layer 2 -> A is correct.
MAC addresses are only used to communicate on the same network. To communicate on different network we have to use Layer 3 addresses (IP addresses) -> B is not correct; E is correct.
Layer 2 frame and Layer 3 packet can be recognized via headers. Layer 3 packet also contains physical address -> C is not correct.
On Ethernet, each frame has the same priority to transmit by default -> D is not correct.
All devices need a physical address to identify itself. If not, they can not communicate -> F is not correct.
Question 5
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 difference between the two buildings. Which media type should be used for the connection?
A. UTP cable
B. STP cable
C. Coaxial cable
D. Fiber optic cable
Answer: D
Explanation
Because the company has problem about voltage potential difference between the two buildings so they should connect via fiber optic cable which uses light pulses to transmit information instead of using electronic pulses.
Question 6
Which command can be used from a PC to verify the connectivity between host that connect through path?
A. tracert address
B. ping address
C. arp address
D. traceroute address
Answer: A
Explanation
To check the connectivity between a host and a destination (through some networks) we can use both “tracert” and “ping” commands. But the difference between these 2 commands is the “tracert” command can display a list of near-side router interfaces in the path between the source and the destination. Therefore the best answer in this case is A – tracert address.
Note: “traceroute” command has the same function of the “tracert” command but it is used on Cisco routers only, not on a PC.
Question 7
Refer to the exhibit. A network engineer is troubleshooting an internet connectivity problem on the computer. What causing the problem?
A. wrong DNS server
B. wrong default gateway
C. incorrect IP address
D. incorrect subnet mask
Answer: C
Explanation
The IP address of the PC (192.168.11.2/24) is not on the same network with its gateway 192.168.1.1 -> C is correct.
Question 8
How many broadcast domains are shown in the graphic assuming only the default vlan is configured on the switches?
A. one
B. six
C. twelve
D. two
Answer: A
Explanation
Only router can break up broadcast domains but in this exhibit no router is used so there is only 1 broadcast domain.
For your information, there are 7 collision domains in this exhibit (6 collision domains between hubs & switches + 1 collision between the two switches).
Question 9
Refer to the exhibit.
|
PC> tracert 10.16.176.23 1 31 ms 31 ms 32ms 172.16.182.1 Trace complete. |
Host A has tested connectivity to a remote network. What is the default gateway for host A?
A. 172.16.182.1
B. 192.168.1.1
C. 10.16.176.1
D. 192.168.1.6
Answer: A
Explanation
It will list all the routers (from nearest to farthest) it passes through until it reaches its destination so the first hop is its nearest IP. If we ping from a PC, it is also the default gateway for that PC -> A is correct.
Question 10
What functions do routers perform in a network? (Choose two)
A. packet switching
B. access layer security
C. path selection
D. VLAN membership assignment
E. bridging between LAN segments
F. microsegmentation of broadcast domains
Answer: A C
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Hi guys, need help on this question..
Refer to the exhibit. After HostA pings HostB, which entry will be in the ARP cache of HostA to Support this transmission?
Exhibit:
http://i1061.photobucket.com/albums/t464/hanselbelen/HostArp.png
Answer: D
not sure why..
@Exam,
reffering to your snapshot, option A looks more like a valid answer to me.
The ARP table will store the mac address of router port Fa0/0. Correct me if i am wrong.
Hi guys, need help on this question..
Refer to the exhibit. After HostA pings HostB, which entry will be in the ARP cache of HostA to Support this transmission?
Exhibit:
http://i1061.photobucket.com/albums/t464/hanselbelen/HostArp.png
Answer: D
not sure why..
@Exam @ sreejith
i think Answer D is really correct
because when host A use ping request he send its packet to default gateway because host B not in the same subnet
so host A will send his packet to f0/0 “default gateway” with mac “mac of this interface”
so he will store ip of interface in his ARP table .
and router will be responsible for route this packet to host b by checking destination IP of this packet
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hi 9tut……! i think the answer for q 7 is wrong and the true answer is D
@mahmoud, sreejith and exam on 5th feb
mahmoud is right
bcoz when data is to transfered first the host A sends its IP address and MAC address to its local Router i.e router1 and then the router 1 DOES NOT send the info to its neighbor but it in turn sends its(router1) MAC address back to HOST A
so the destination MAC address is always the MAC address of first router
I am very sure of the answer
Can anyone help plz
A host is attempting to send data to another host on a different network. What is the first action that the sendin host will take?
A.Send the data frames to default gateway.
B.Create an ARP request to get a MAC address for the receiving host.
Which is the best ans ???
..
@faraz
the answer is obvious: send the frames to the default gateway.
why? because the other host is on a different network and there is no need for the sender to know the MAC address of the receiver
can help me for interview question
Hello everyone,
Hope you all are fine , i would be really thankful if anyone could provide me with the latest dumps !!. My exam is in 10 days
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@faraz,
ans is A …if host is of diff network then host a will never ask for the mac address of host b.
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@9tut: I have read one question in almost every dump. 3 Rouuters are back to back connected and one PC(host) connected with first router. now host is pinging the last (3rd ) router and they have asked what is the TTL Valu for this.
A. 253
B. 252
C. 254
D. 255
kindly validate the question as well as answer
2.Which of the following statements describe the network shown in the graphic? (Choose two)
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
Explanation
Only router can break up broadcast domains so in the exhibit there are 2 broadcast domains: from e0 interface to the left is a broadcast domain and from e1 interface to the right is another broadcast domain -> A is correct.
Both router and switch can break up collision domains so there is only 1 collision domain on the left of the router (because hub doesn’t break up collision domain) and there are 6 collision domains on the right of the router (1 collision domain from e1 interface to the switch + 5 collision domains for 5 PCs in Production) -> F is correct.
I can’t adrestaned becouse 1 collision e1 & 5 pc =6 not 7
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please can someone explain to me colision domais im confuse about these two answers..
@anonymous
a collision domain is that part of the network on which some devices can send data using the same medium.
a hub allows you to connect, lets say, 5 computers. all those 5 computers are in the same collision domain and there is a risk frames could be corrupted because 2 or more computers could try to send data at the same time. these 5 computers are using half duplex (and 10 Mbit of course)
a switch port that operates at full duplex (10, 100 or more Mbit) has only 1 device attached it. that cable between the switch port and the device represents 1 collision domain.
switches provide segmentation of the network at Layer 2 (more collision domains) and at Layer 3 (VLANs – broadcast domains)
more collision domains = something good :)
i’d recommend you watch cbtnuggets videos by jeremy cioara to better understand the basics. he also talks about segmentation
to understand what OSI layers are and what they represent please read here:
http://www.9tut.com/osi-model-tutorial
cheers
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