New CCNA – Switch Questions
Question 1
Refer to the exhibit.
Switch-1 needs to send data to a host with a MAC address of 00b0.d056.efa4. What will Switch-1 do with this data?
A. Switch-1 will drop the data because it does not have an entry for that MAC address.
B. Switch-1 will forward the data to its default gateway.
C. Switch-1 will flood the data out all of its ports except the port from which the data originated.
D. Switch-1 will send an ARP request out all its ports except the port from which the data originated.
Answer: C
Explanation
The MAC address of 00b0.d056.efa4 has not been learned in its MAC address table so Switch-1 will broadcast the frame out all of its ports except the port from which the data originated.
Question 2
A technician has installed SwitchB and needs to configure it for remote access from the management workstation connected SwitchA. Which set of commands is required to accomplish this task?
A.
SwitchB(config)#interface FastEthernet 0/1
SwitchB(config)#ip address 192.168.8.252 255.255.255.0
SwitchB(config)#no shutdown
B.
SwitchB(config)#ip default-gateway 192.168.8.254
SwitchB(config)#interface vlan 1
SwitchB(config)#ip address 192.168.8.252 255.255.255.0
SwitchB(config)#no shutdown
C.
SwitchB(config)#interface vlan 1
SwitchB(config)#ip address 192.168.8.252 255.255.255.0
SwitchB(config)#ip default-gateway 192.168.8.254 255.255.255.0
SwitchB(config)#no shutdown
D.
SwitchB(config)#ip default-network 192.168.8.254
SwitchB(config)#interface vlan 1
SwitchB(config)#ip address 192.168.8.252 255.255.255.0
SwitchB(config)#no shutdown
Answer: B
Explanation
To remote access to SwitchB, it must have a management IP address on a VLAN on that switch. Traditionally, we often use VLAN 1 as the management VLAN (but in fact it is not secure).
In the exhibit, we can recognize that the Management Workstation is in a different subnet from the SwitchB. For intersubnetwork communication to occur, you must configure at least one default gateway. This default gateway is used to forward traffic originating from the switch only, not to forward traffic sent by devices connected to the switch.
Question 3
A switch is configured with all ports assigned to vlan 2 with full duplex FastEthernet to segment existing departmental traffic. What is the effect of adding switch ports to a new VLAN on the switch?
A. More collision domains will be created.
B. IP address utilization will be more efficient.
C. More bandwidth will be required than was needed previously.
D. An additional broadcast domain will be created.
Answer: D
Question 4
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 5
Refer to the exhibit.
What two results would occur if the hub were to be replaced with a switch that is configured with one Ethernet VLAN? (Choose two)
A. The number of collision domains would remain the same.
B. The number of collision domains would decrease.
C. The number of collision domains would increase.
D. The number of broadcast domains would remain the same.
E. The number of broadcast domains would decrease.
F. The number of broadcast domains would increase.
Answer: C D
Question 6
Refer to the exhibit. Give this output for SwitchC, what should the network administrator’s next action be?
A. Check the trunk encapsulation mode for SwitchC’s fa0/1 port.
B. Check the duplex mode for SwitchC’s fa0/1 port.
C. Check the duplex mode for SwitchA’s fa0/2 port.
D. Check the trunk encapsulation mode for SwitchA’s fa0/2 port.
Answer: C
Question 7
Which three statements accurately describe layer 2 Ethernet switches? (choose three)
A. Microsegmentation decreases the number of collisions on the network.
B. If a switch receives a frame for an unknown destination.it uses ARP to resolve the address.
C. Spanning Tree Protocol allows switches to automatically share vlan information.
D. In a properly functioning network with redundant switched paths, each switched segment will contain one root bridge with all its ports in the forwarding state. All other switches in that broadcast domain will have only one root port.
E. Establishing vlans increases the number of broadcast domains.
F. Switches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3 address information.
Answer: A D E
Question 8
Why will a switch never learn a broadcast address?
A. Broadcast frames are never sent to switches.
B. Broadcast addresses use an incorrect format for the switching table.
C. A broadcast address will never be the source address of a frame.
D. Broadcasts only use network layer addressing.
E. A broadcast frame is never forwarded by a switch.
Answer: C
Question 9
Refer to the exhibit:
Which two statements are true of the interfaces on Switch1? (Choose two)
A. Interface FastEthernet0/2 has been disabled.
B. Multiple devices are connected directly to FastEthernet0/1.
C. FastEthernet0/1 is configured as a trunk link.
D. FastEthernet0/1 is connected to a host with multiple network interface cards
E. FastEthernet0/5 has statically assigned MAC addresses.
F. A hub is connected directly to FastEthernet0/5
Answer: C F
Explanation
FastEthernet0/1 can receive traffic from multiple VLANs -> it is configured as a trunk.
There are two MAC addresses learned from FastEthernet0/5 -> a hub is used on this port.
Question 10
The network administrator normally establishes a Telnet session with the switch from host A. The administrator’s attempt to establish a connect via Telnet to the switch from host B fails, but pings from host B to other two hosts are successful. What is the issue for this problem?
A. Host B and the switch need to be in the same subnet.
B. The switch needs an appropriate default gateway assigned.
C. The switch interface connected to the router is down.
D. Host B need to be assigned an IP address in vlan 1.
Answer: B
Explanation
Host A (172.19.1.1) and the management IP address of the Switch (172.19.1.250) are in the same subnet so telnet from host A to the switch can be successful even if a default gateway is not set on host A.
But host B (172.19.32.2) and the management IP address of the Switch (172.19.1.250) are not in the same subnet so host B needs a default gateway to telnet to the switch. The default gateway on host B should be 172.19.32.254.
Question 9 was in today’s exam.
exactly with same screen and ip details!!!
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question 5 image is broken… this shouldn’t happen on a site with paid access.
GDR shut up man
Question 5 image is broken. Please do something
@GDR, @WebCure: You can see the image now. We are sorry about it.
tanks 2 9tut…..q6,7,8 came out
i wrote 2day scored 958…..
Question 9 answer CF does not add up to m…
Why F..HUB dynamicaly learns mac address…they dont have memory buffer…..and the CDP states that port is conneceted to 2950..switch ???????
“Brown” Fa0/5 on CDP is port of the remote switch, not the local switch.
Question 1: Why switch is not using ARP to resolve address for destination???
I think ans:D Plz. someone through some light…
OK, Understood PC is sending broadcast arp request thats why switch will not learn mac address…
hi friends, Plz. check Q1 on packet tracer… I tried to ping and got…
1. If Switch-1 wants to send data it will send arp request out of all its ports.
2. If some other host is sending data from same network then
(a) That host will use ARP for finding Mac-address if he doesn’t have it.
(b) Data will directly forwarded to host on same network if he has mac-address
for the destination host.
according to the question right ans should be:
Ans: Switch-1 will send an ARP request out of all its ports.
hi frnz….if i have two PC..PC-A and PC-B. PC-A is connected to Switch A and PC-B connected to Switch 2. Sw-1 and Sw-2 are connected through access port.
My ques. is …wt happened when a frame arrives on a switch and how arp work in this scenario…can anybody explain me..packet flow of PC A to PC B…
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hi every body ,,ihave 2 take ccna exam next week,,,,,someone tell me wht i do 2 pass
Question 10′s answer is illogical, if the host wasn’t assigned an appropriate gateway it wouldn’t be able to ping hosts on the other two vlans, the explanation didn’t even talk about this fact !
and the answer B is actually talking about a DG for the switch, not the host !
I agree with you Anonymous, the explanation of the answer 10 tells that they are not in the same subnet and Host B has to configure a default-gateway. However, the answer B tells to configure a default-gateway on the switch..
Hi Aditya!
From my own understanding, an ARP request is used only to figured out a “unknown” MAC address just as the name implies Address resolution protocol. Q1 says you have a specific MAC address but not in the Mac address table of the switch, so the switch does not need to know the mac address, it should only figure out which port that mac address is attached with.
Im not a master, just a newbie, but that’s what I understand an ARP request. Can someone kindly enlightened us.
Thanks.
Newbie,
A switch does not ARP. It’s a Layer-2 device and does not understand TCP/IP. Other than via static configuration, the only way it can build its MAC address table is by recording source MAC addresses of frames as they arrive on different ports.
Can someone explain the answer to question 10?
I cant understand this part
“But host B (172.19.32.2) and the management IP address of the Switch (172.19.1.250) are not in the same subnet so host B needs a default gateway to telnet to the switch. The default gateway on host B should be 172.19.32.254.”
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Q1 says sw1 needs to send data to host that has destination mac address not a destination ip.. ……what an arp does is to resolve ip address to mac address…. and question clearly specifies that it has mac address so it wont use arp ,,,,,,,, it just floods out the data …..c is correct !!
Q.10
As it is said Host B is able to ping other two hosts which are in two different vlans, it should have a default gateway assigned to communicate with device which is in different vlan/network.
So it is clear that host B is having a default gateway, now to telnet into the switch from host B either there should be a vlan 32 interface configured on switch, in that scenario there will be in the same subnet. But in the question, vlan 32 interface is not mentioned then switch should have default gateway assigned to 172.19.32.254 will work.
Really very much helpful :) Thanks to 9tut :) & Thanks to comment guiders :)
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Any one pls explain the question 3 ?
am not clear with Q6 will any one explain me pls?
@lyn$
Q3
new host added to a new Vlan …. means that a new vlan has created here So new Vlan means new broadcast domain … i hope this helps ;)
@KJ
Q6
the error here is CRC error ,, So this error comes from duplex mismatch for Example Hub connected to switch we must at first check the duplex on the other switch here and if it is half duplex make it full duplex >>> i hope this helps ..
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B is correct answer. First part of explanation is OK whereas the second part is not. It’s the switch that needs to be assigned a default set and not Host B.
Q10: B is correct answer. First part of explanation is OK whereas the second part is not. It’s the switch that needs to be assigned a default set and not Host B.
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Q10:
Switch needs a default-gateway so that it can send back the reply of a telnet request coming from a different vlan. The Host B is in a different vlan (i.e. different IP subnet), so it can send its telnet request that will go through the router to the switch vlan 1 interface, but switch has no way to send back its reply because of unavailability of default-gateway. Therefore, it is the Switch that needs the default-gateway, not the Host B.
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I passed mine today the only thing you need to do know the answers by heart
Q9&10 were in today’s exam.
hi … i am writing my ccna exam on monday please could u sent me the latest dumps that u people got.. mohsinfida489@yahoo.com
@Sabry bro are you alright? stop telling lie here in comments
In Q-4 i think answer D in not correct bcoz in question it says switch are not turning orange or green. ??????
In Q-4 i think answer D in not correct bcoz in question it says switch is not turning orange or green. ??????
Studying hard from Costa Rica, taking exam in 3 weeks!!
what is the exact difference between a collision and broadcast domain?
@ g search the web for “collision domain broadcast domain”. You´ll get plenty of results.
Hi everyone!!!
In Q9 im having troubles to understand the answer, How can i notice a hub is conennected to the switch?? It is not clear for me.
Greetings!!!
To answer question 10. The telnet packet from host B is getting to the switch’s VLAN 1 interface, because the router is forwarding the packet there. But since the switch does not have a default gateway configured it does not have a path back to host B, so the packet is dropped. So answer B is correct.