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Question No :1
Refer to the exhibit. Router edge-1 is unable to establish OSPF neighbor adjacency with router ISP-1. Which two configuration changes can you make on edge-1 to allow the two routers to establish adjacency? (Choose two.)

A. Set the subnet mask on edge-1 to 255 255.255.252.
B. Reduce the MTU on edge-1 to 1514.
C. Set the OSPF cost on edge-1 to 1522.
D. Reduce the MTU on edge-1 to 1500.
E. Configure the ip ospf mtu-ignore command on the edge-1 Gi0/0 interface.

Answer: DE
Explanation:
A situation can occur where the interface MTU is at a high value, for example 9000, while the real
value of the size of packets that can be forwarded over this interface is 1500. If there is a mismatch on MTU on both sides of the link where OSPF runs, then the OSPF adjacency will not form because the MTU value is carried in the Database Description (DBD) packets and checked on the other side.

Question No : 2

A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server. What is the highest layer of the protocol stack that the network administrator is using for this operation?

A. application
B. presentation
C. session
D. transport
E. internet
F. data link

Answer: A
Explanation:

FTP belongs to Application layer and it is also the highest layer of the OSI model.

Question No : 3

A receiving host computes the checksum on a frame and determines that the frame is damaged. The frame is then discarded. At which OSI layer did this happen?

A. session
B. transport
C. network
D. data link
E. physical

Answer: D
Explanation:
The Data Link layer provides the physical transmission of the data and handles error notification, network topology, and flow control. The Data Link layer formats the message into pieces, each called a data frame, and adds a customized header containing the hardware destination and source address. Protocols Data Unit (PDU) on Datalink layer is called frame. According to this question the frame is damaged and discarded which will happen at the Data Link layer.

2018 Valid Cisco 200-125 Dumps Questions - Cisco 200-125 Braindumps Dumps4Download

Question No : 4
Hotspot Question - RIPv2 Troubleshooting 

- Router R1 connects the main office to internet, and routers R2 and R3 are internal routers
- NAT is enabled on Router R1
- The routing protocol that is enabled between R1, R2 and R3 is RIPv2
- R1 sends default route into RIPv2 for internal routers to forward
internet traffic to R1
- Server1 and Server 2 are placed in VLAN 100 and 200 respectively, and are still running on stick Configuration with router R2.
You have console access on R1, R2, R3 and L2SW1 devices.
Use only show commands to troubleshoot the issues. Server1 and Server2 are unable to communicate with the rest of the network. Your initial check with system administrators shows that IP address settings are correctly configured on the server

side. What could be an issue?

A. The VLAN encapsulation is misconfigured on the router subinterfaces.
B. The Router is missing subinterface configuration.
C. The Trunk is not configured on the L2SW1 switch.
D. The IP address is misconfigured on the primary router interface.

Answer: A
Explanation:
Check the configuration of the interface that is connected to Server1 and Server2 on R2 with

“show running-config” command.

We see that subinterface E0/1.100 has been configured with VLAN 200 (via “encapsulation dot1Q 200” command) while Server1 belongs to VLAN 100. Therefore this configuration is not correct. It should be “encapsulation dot1Q 100” instead. The same thing for interface E0/1.200, it should be “encapsulation dot1Q 200” instead.

Question No : 5

Hotspot Question - DHCP
Examine the DHCP configuration between R2 and R3,R2 is configured as the DHCP server and R3 as the client. What is the reason R3 is not receiving the IP address via DHCP?

A. On R3,DHCP is not enabled on the interface that is connected to R2.

B. On R3,the interface that is connected to R2 is in shutdown condition.

C. On R2, the interface that is connected to R3 is in shutdown condition.

D. On R2, the network statement in the DHCP pool configuration is incorrectly configured


Answer: A
Explanation: 
First we should check which interface on R3 that is connected to R2 via the “show run” command.

From the description we learn interface E0/1 is connected to R2. Use the “show ip interface brief” command to verify the IP address of this interface. 

Therefore we can conclude this interface does not have any IP address and there is no configuration on this interface (except the “description Link to R2” line).

If R3 wants to receive an IP address from R2 via DHCP, interface E0/1 should be configured with the command “ip address dhcp” so the answer “DHCP is not enabled on this interface” is correct.

Question No : 6
Which switching method duplicates the first six bytes of a frame before making a switching decision?

A. fragment-free switching
B. store and-forward switching
C. cut through switching
D. ASIC switching

Answer: C
Explanation:
Cut and Through method has lowest latency. In this method Switch only read first six bytes from frame after the preamble. These six bytes are the destination address of frame. This is the fastest
method of switching. This method also processes invalid frames. Only advantage of this method is speed.