Cisco 200-125 Online Practice Questions and Exam Preparation

Cisco 200-125 Online Questions & Answers

• Question 521:

  You are configuring an IP SLA ICMP Echo operation to troubleshoot a network connectivity issue. When do you enter an IP address to test the IP SLA?

  A. when you enable the ICMP Echo operation
  B. when you define the ICMP Echo operation
  C. when you specify the test frequency
  D. when you verify the IP SLA operation
  B. when you define the ICMP Echo operation

• Question 522:

  Which spanning-tree feature places a port immediately into a forwarding stated?

  A. BPDU guard
  B. PortFast
  C. loop guard
  D. UDLD
  E. Uplink Fast
  B. PortFast

  ---

  PortFast causes a switch or trunk port to enter the spanning tree forwarding state immediately, bypassing the listening and learning states. You can use PortFast on switch or trunk ports that are connected to a single workstation, switch, or server to allow those devices to connect to the network immediately, instead of waiting for the port to transition from the listening and learning states to the forwarding state.

• Question 523:

  Which two addresses are broadcast addresses? (Choose two)

  A. 172.17.210.255/24
  B. 10.1.2.255/23
  C. 10.1.0 255/23
  D. 10.1.2.255/22
  E. 10.1.1.255/23
  A. 172.17.210.255/24
  E. 10.1.1.255/23

• Question 524:

  Which purpose of the network command in OSPF configuration mode is true?

  A. It defines a wildcard mask to identify the sizeof the network.
  B. It defines the area ID.
  C. It defines the network by its classful entry.
  D. It defines which networks are used for virtual links.
  A. It defines a wildcard mask to identify the sizeof the network.

• Question 525:

  Which IPv6 address is valid?

  A. 2001:0db8:0000:130F:0000:0000:08GC:140B
  B. 2001:0db8:0:130H::87C:140B
  C. 2031::130F::9C0:876A:130B
  D. 2031:0:130F::9C0:876A:130B
  D. 2031:0:130F::9C0:876A:130B

  ---

  An IPv6 address is represented as eight groups of four hexadecimal digits, each group representing 16 bits (two octets). The groups are separated by colons (:). An example of an IPv6 address is 2001:0db8:85a3:0000:0000:8a2e:0370:7334. The leading 0's in a group can be collapsed using ::, but this can only be done once in an IP address.

• Question 526:

  What are two benefits of using a single OSPF area network design? (Choose two.)

  A. It is less CPU intensive for routers in the single area.
  B. It reduces the types of LSAs that are generated.
  C. It removes the need for virtual links.
  D. It increases LSA response times.
  E. It reduces the number of required OSPF neighbor adjacencies.
  B. It reduces the types of LSAs that are generated.
  C. It removes the need for virtual links.

  ---

  OSPF uses a LSDB (link state database) and fills this with LSAs (link state advertisement). The link types are as follows:

  SA Type 1: Router LSA SA Type 2: Network LSA SA Type 3: Summary LSA SA Type 4: Summary ASBR LSA SA Type 5: Autonomous system external LSA SA Type 6: Multicast OSPF LSA SA Type 7: Not-so-stubby area LSA SA Type 8: External attribute LSA for BGP

  If all routers are in the same area, then many of these LSA types (Summary ASBR LSA, external LSA, etc) will not be used and will not be generated by any router.

  All areas in an Open Shortest Path First (OSPF) autonomous system must be physically connected to the backbone area (Area 0). In some cases, where this is not possible, you can use a virtual link to connect to the backbone through a non-backbone area. You can also use virtual links to connect two parts of a partitioned backbone through a non- backbone area. The area through which you configure the virtual link, known as a transit area, must have full routing information. The transit area cannot be a stub area. Virtual links are not ideal and should really only be used for temporary network solutions or migrations. However, if all locations are in a single OSPF area this is not needed.

• Question 527:

  What does split-horizon do?

  A. Prevent routing loop in distance vector protocol
  B. Prevent switching loop in distance vector protocol
  C. Prevent switching loop in link-state protocol
  D. Prevent routing loop in link-state protocol
  A. Prevent routing loop in distance vector protocol

• Question 528:

  Which route source code represents the routing protocol with a default administrative distance of 90 in the routing table?

  A. S
  B. E
  C. D
  D. R
  E. O
  C. D

  ---

  SStatic EEGP DEIGRP RRIP OOSPF

  Default Administrative distance of EIGRP protocol is 90 then answer is C

  

  Default Distance Value TableThis table lists the administrative distance default values of the protocols that Cisco supports: Route Source Default Distance Values Connected interface Static route Enhanced Interior Gateway Routing Protocol (EIGRP) summary route External Border Gateway Protocol (BGP) Internal EIGRP IGRP OSPF Intermediate System-to-Intermediate System (IS-IS) Routing Information Protocol (RIP) Exterior Gateway Protocol (EGP) On Demand Routing (ODR) External EIGRP Internal BGP Unknown*

• Question 529:

  Which three are benefits of VLANs? (Choose three.)

  A. They increase the size of collision domains.
  B. They allow logical grouping of users by function.
  C. They can enhance network security.
  D. They increase the size of broadcast domains while decreasing the number of collision domains.
  E. They increase the number of broadcast domains while decreasing the size of the broadcast domains.
  F. They simplify switch administration.
  B. They allow logical grouping of users by function.
  C. They can enhance network security.
  E. They increase the number of broadcast domains while decreasing the size of the broadcast domains.

  ---

  When using VLAN the number and size of collision domains remain the same ->

  VLANs allow to group users by function, not by location or geography -> .

  VLANs help minimize the incorrect configuration of VLANs so it enhances the security of the network -> .

  VLAN increases the size of broadcast domains but does not decrease the number of collision domains ->

  VLANs increase the number of broadcast domains while decreasing the size of the broadcast domains which increase the utilization of the links. It is also a big advantage of VLAN -> .

  VLANs are useful but they are more complex and need more administration ->

• Question 530:

  Scenario

  Refer to the topology. Your company has connected the routers R1, R2, and R3 with serial links. R2 and R3 are connected to the switches SW1 and SW2, respectively. SW1 and SW2 are also connected to the routers R4 and R5.

  The EIGRP routing protocol is configured.

  You are required to troubleshoot and resolve the EIGRP issues between the various routers.

  Use the appropriate show commands to troubleshoot the issues.

  

  The loopback interfaces on R4 with the IP addresses of 10.4.4.4/32, 10.4.4.5/32, and 10.4.4.6/32 are not appearing in the routing table of R5. Why are the interfaces missing?

  A. The interfaces are shutdown, so they are not being advertised.
  B. R4 has been incorrectly configured to be in another AS, so it does not peer with R5.
  C. Automatic summarization is enabled, so only the 10.0.0.0 network is displayed.
  D. The loopback addresses haven't been advertised, and the network command is missing on R4.
  D. The loopback addresses haven't been advertised, and the network command is missing on R4.

  ---

  For an EIGRP neighbor to form, the following must match:

  -Neighbors must be in the same subnet

  -K values

  -AS numbers

  -Authentication method and key strings

  Here, we see that R4 is configured for EIGRP AS 2, when it should be AS 1.