Switch Questions
Quick review of switch function: In brief, the basic switching function at Layer 2 adheres to these rules for determining forwarding responsibility: Reference: http://www.ciscopress.com/articles/article.asp?p=2348264 |
Question 1
Question 2
Explanation
The down/down state indicates a Layer 1 problem -> “Protocol mismatch” answer is a Layer 2 problem so it is not correct.
Duplex should be matched on both side but it is not a must -> Therefore “duplex mismatch” is not a correct answer.
The most common Layer 1 problems are faulty or incorrect cabling or hardware failure but none of them is in the answer choices.
If the port is error-disabled, we will see it in down/down state so this answer is correct.
SW#sh int f1/0/1 FastEthernet1/0/1 is down, line protocol is down (err-disabled) |
There are only two answers left, which are “speed mismatch” and “interface is shut down”. According to the table below (from the old and retired ICND1 100-101 Official Cert Guide), speed mismatch is also a cause of down/down state.
Note:
+ Speed must match between two ends. We tested speed mismatch on real device but we only received “up/down” state.
+ If “interface is shut down” then we will see the “administratively down/down”, not “down/down” state. But the “down/down” state would be seen on the far end interface.
Question 3
Question 4
Explanation
The MAC addresses in the CAM table are the source MAC addresses only. Therefore it only learns MAC address from ingress traffic.
@9tut,
Can you explain answer C (C. moves packets within a VLAN) of Question 3, please?
I thought VLANs are at layer3 and the question is referring at layer 2 switch!! Thanks a lot.
VLANS are on L2 like the Ethernet protocol and these protocols are:
https://www.manageengine.com/network-monitoring/layer-2-protocols.html
anyone who have …….readable book for CCNA 200-301
The SW1 interface g0/1 is in the down/down state. Which two configurations are valid reasons for the interface conditions? (Choose two)
A. There is a duplex mismatch
B. There is a speed mismatch
C. There is a protocol mismatch
D. The interface is shut down
E. The interface is error-disabled
I think about the problem
answer is B and E
Question 2
B and E are the right answers
@HIRO, @Alfie: Yes, thanks for your detection! We reviewed Q2 and corrected them.
Hi, regarding Question 2 :
The SW1 interface g0/1 is in the down/down state. Which two configurations are valid reasons for the interface conditions? (Choose two)
A. There is a duplex mismatch
B. There is a speed mismatch
C. There is a protocol mismatch
D. The interface is shut down
E. The interface is error-disabled
we can understand it better on the CLI :
Router#show ip int br
Interface IP-Address OK? Method Status Protocol
GigabitEthernet0/0/0 10.2.2.2 YES manual up up
GigabitEthernet0/0/1 unassigned YES unset administratively down down
GigabitEthernet0/0/2 unassigned YES unset administratively down down
Vlan1 unassigned YES unset administratively down down
Router#
Thanks,
how to wipe the switch in easy way?
Shah Mohammad Niazy – you do a “write erase” (takes out config file)then make sure your in flash directory and do a “delete vlan.dat” (takes out vlan database/CAM)
I am not able to see the question, I have paid for the premium service, could you please fix this issue as soon as posible
@Anonymous: If your problem still exists, please send an email to support@9tut.com.
Hi guys! Please tell me, If i’m from Russia can I get Cisco certificate?
Hi guys! I’m from somalia how can I learn cisco for my language?
@9tut what does mean by speed mismatch in Question 2?? Does it mean port speed??
@D: Speed means 10Mbps, 100Mbps or 1000Mbps. You can find the speed of the interface with the “show interfaces” (for example: “Full duplex, 100Mb/s”) or “show interface {interface} status”.