Cisco 200-125 Online Practice Questions and Exam Preparation

Cisco 200-125 Online Questions & Answers

• Question 1091:

  Refer to the graphic.

  

  Host A is communicating with the server. What will be the source MAC address of the frames received by Host A from the server?

  A. the MAC address of router interface e0
  B. the MAC address of router interface e1
  C. the MAC address of the server network interface
  D. the MAC address of host A
  A. the MAC address of router interface e0

  ---

  Whereas switches can only examine and forward packets based on the contents of the MAC header, routers can look further into the packet to discover the network for which a packet is destined. Routers make forwarding decisions based on the packet's network- layer header (such as an IPX header or IP header). These network-layer headers contain source and destination network addresses. Local devices address packets to the router's MAC address in the MAC header. After receiving the packets, the router must perform the following steps:

  1.

  Check the incoming packet for corruption, and remove the MAC header. The router checks the packet for MAC-layer errors. The router then strips off the MAC header and examines the network-layer header to determine what to do with the packet.

  2.

  Examine the age of the packet. The router must ensure that the packet has not come too far to be forwarded. For example, IPX headers contain a hop count. By default, 15 hops is the maximum number of hops (or routers) that a packet can cross. If a packet has a hop count of 15, the router discards the packet. IP headers contain a Time to Live (TTL) value. Unlike the IPX hop count, which increments as the packet is forwarded through each router, the IP TTL value decrements as the IP packet is forwarded through each router. If an IP packet has a TTL value of 1, the router discards the packet. A router cannot decrement the TTL value to 1 and then forward the packet.

  3.

  Determine the route to the destination. Routers maintain a routing table that lists available networks, the direction to the desired network (the outgoing interface number), and the distance to those networks. After determining which direction to forward the packet, the router must build a new header. (If you want to read the IP routing tables on a Windows 95/98 workstation, type ROUTE PRINT in the DOS box.)

  4.

  Build the new MAC header and forward the packet. Finally, the router builds a new MAC header for the packet. The MAC header includes the router's MAC address and the final destination's MAC address or the MAC address of the next router in the path.

• Question 1092:

  Refer to the exhibit.

  

  After you apply the given configuration to arouter, the DHCP clients behind the device connot communicate with hosts outside of their subnet. Which action is most likely to correct the problem?

  A. Configure the dns server on the same subnet as the clients
  B. Activate the dhcp pool
  C. Correct the subnet mask
  D. configure the default gateway
  D. configure the default gateway

• Question 1093:

  Which two commands can you use to verify an IP SLA ?(choose two)

  A. show ip sla application
  B. show ip sla reaction-configuration
  C. show ip sla statistics
  D. show ip sla configuration
  C. show ip sla statistics
  D. show ip sla configuration

• Question 1094:

  Refer to the exhibit.

  

  The output that is shown is generated at a switch. Which three statements are true? (Choose three.)

  A. All ports will be in a state of discarding, learning, or forwarding.
  B. Thirty VLANs have been configured on this switch.
  C. The bridge priority is lower than the default value for spanning tree.
  D. All interfaces that are shown are on shared media.
  E. All designated ports are in a forwarding state.
  F. This switch must be the root bridge for all VLANs on this switch.
  A. All ports will be in a state of discarding, learning, or forwarding.
  C. The bridge priority is lower than the default value for spanning tree.
  E. All designated ports are in a forwarding state.

  ---

  From the output, we see that all ports are in designated role (forwarding state). The command "show spanning-tree vlan 30 only shows us information about VLAN 30. We don't know how many VLAN exists in this switch ->. The bridge priority

  of this switch is 24606 which is lower than the default value bridge priority 32768.

  All three interfaces on this switch have the connection type "p2p", which means Point-to- point environment ?not a shared media. The only thing we can specify is this switch is the root bridge for VLAN 3o but we cannot guarantee it is also the

  root bridge for other VLANs.

• Question 1095:

  Which command can you execute to set the user inactivity timer to 10 seconds?

  A. SW1(config-line)#exec-timeout 0 10
  B. SW1(config-line)#exec-timeout 10
  C. SW1(config-line)#absolute-timeout 0 10
  D. SW1(config-line)#absolute-timeout 10
  A. SW1(config-line)#exec-timeout 0 10

• Question 1096:

  What command is used to verify the DLCI destination address in a Frame Relay static configuration?

  A. show frame-relay pvc
  B. show frame-relay lmi
  C. show frame-relay map
  D. show frame relay end-to-end
  C. show frame-relay map

  ---

  Sample "show frame-relay map" output: R1#sh frame map Serial0/0 (up): ip 10.4.4.1 dlci 401(0x191,0x6410), dynamic, broadcast,, status defined, active Serial0/0 (up): ip 10.4.4.3 dlci 403(0x193,0x6430), dynamic, broadcast,, status defined, active Serial0/0 (up): ip 10.4.4.4 dlci 401(0x191,0x6410), static, CISCO, status defined, active

• Question 1097:

  Scenario

  Refer to the topology. Your company has decided to connect the main office with three other remote branch offices using point-to-point serial links.

  You are required to troubleshoot and resolve OSPF neighbor adjacency issues between the main office and the routers located in the remote branch offices.

  

  An OSPF neighbor adjacency is not formed between R3 in the main office and R5 in the Branch2 office. What is causing the problem?

  A. There is an area ID mismatch.
  B. There is a PPP authentication issue; a password mismatch.
  C. There is an OSPF hello and dead interval mismatch.
  D. There is a missing network command in the OSPF process on R5.
  C. There is an OSPF hello and dead interval mismatch.

  ---

  The "show ip ospf interface command on R3 and R5 shows that the hello and dead intervals do not match. They are 50 and 200 on R3 and 10 and 40 on R5.

  

• Question 1098:

  What is a global command?

  A. a command that is set once and affects the entire router
  B. a command that is implemented in all foreign and domestic IOS versions
  C. a command that is universal in application and supports all protocols
  D. a command that is available in every release of IOS, regardless of the version or deployment status
  E. a command that can be entered in any configuration mode
  A. a command that is set once and affects the entire router

  ---

  When you enter global configuration mode and enter a command, it is applied to the running configuration file that is currently running in ram. The configuration of a global command affects the entire router. An example of a global command is one used for the hostname of the router.

• Question 1099:

  Which command do use we to see SNMP version

  A. show snmp pending
  B. show snmp engineID
  C. snmp-server something
  A. show snmp pending

  ---

  Explanation: ref: https://www.cisco.com/c/en/us/td/docs/ios/12_2/configfun/command/reference/ffun_r/frf014.html#wp1053304

• Question 1100:

  What are three approaches that are used when migrating from an IPv4 addressing scheme to an IPv6 scheme. (Choose three.)

  A. enable dual-stack routing
  B. configure IPv6 directly
  C. configure IPv4 tunnels between IPv6 islands
  D. use proxying and translation to translate IPv6 packets into IPv4 packets
  E. statically map IPv4 addresses to IPv6 addresses
  F. use DHCPv6 to map IPv4 addresses to IPv6 addresses
  A. enable dual-stack routing
  C. configure IPv4 tunnels between IPv6 islands
  D. use proxying and translation to translate IPv6 packets into IPv4 packets

  ---

  Several methods are used terms of migration including tunneling, translators, and dual stack. Tunnels are used to carry one protocol inside another, while translators simply translate IPv6 packets into IPv4 packets. Dual stack uses a combination of both native IPv4 and IPv6. With dual stack, devices are able to run IPv4 and IPv6 together and if IPv6 communication is possible that is the preferred protocol. Hosts can simultaneously reach IPv4 and IPv6 content.