Exam 200-125 - All Questions

A network administrator needs to configure port security on a switch. Which two statements are true? (Choose two.)


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Which interface counter can you use to diagnose a duplex mismatch problem?


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Which switching method duplicates the first six bytes of a frame before making a switching decision?


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Which logging command can enable administrators to correlate syslog messages with millisecond precision?


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Which two spanning-tree port states does RSTP combine to allow faster convergence? (Choose two.)


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Which feature can you implement to reserve bandwidth for VoIP calls across the call path?


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Which three statements about link-state routing are true? (Choose three.)


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Which command can you enter to determine whether a switch is operating in trunking mode?


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What are three benefits of implementing VLANs? (Choose three.)


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Which command can you enter to view the ports that are assigned to VLAN 20?


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In which two formats can the IPv6 address fd15:0db8:0000:0000:0700:0003:400F:572B be written? (Choose two.)


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When an interface is configured with PortFast BPDU guard, how does the interface respond when it receives a BPDU?


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What are three characteristics of the TCP protocol? (Choose three.)


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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.

Use appropriate show commands to troubleshoot the issues and answer all four questions.

Instructions -

An OSPF neighbor adjacency is not formed between R3 in the main office and R4 in the Branch1 office. What is causing the problem?


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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.

Use appropriate show commands to troubleshoot the issues and answer all four questions.

Instructions -

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


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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.

Use appropriate show commands to troubleshoot the issues and answer all four questions.

Instructions -

R1 does not form an OSPF neighbor adjacency with R2. Which option would fix the issue?


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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.

Use appropriate show commands to troubleshoot the issues and answer all four questions.

Instructions -

An OSPF neighbor adjacency is not formed between R3 in the main office and R6 in the Branch3 office. What is causing the problem?


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What are three advantages of VLANs? (Choose three.)


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Which command can you enter to determine whether serial interface 0/2/0 has been configured using HDLC encapsulation?


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Which function of the IP SLAs ICMP jitter operation can you use to determine whether a VoIP issue is caused by excessive end-to-end time?


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Refer to the exhibit.

Which of these statements correctly describes the state of the switch once the boot process has been completed?


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Refer to the exhibit.

The network administrator normally establishes a Telnet session with the switch from host A. However, host A is unavailable. The administrator's attempt to telnet to the switch from host fails, but pings to the other two hosts are successful. What is the issue?


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Which condition does the err-disabled status indicate on an Ethernet interface?


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Which statement about RADIUS security is true?


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A router has learned three possible routes that could be used to reach a destination network. One route is from EIGRP and has a composite metric of 20514560.

Another route is from OSPF with a metric of 782. The last is from RIPv2 and has a metric of 4. Which route or routes will the router install in the routing table?


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Which two correctly describe steps in the OSI data encapsulation process? (Choose two.)


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Which two statements about IPv4 multicast traffic are true? (Choose two.)


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Refer to the exhibit.

All of the routers in the network are configured with the ip subnet-zero command. Which network addresses should be used for Link A and Network A? (Choose two.)


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Which type of device can be replaced by the use of subinterfaces for VLAN routing?


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Which Layer 2 protocol encapsulation type supports synchronous and asynchronous circuits and has built-in security mechanisms?


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Which statement about LLDP is true?


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What are two benefits of private IPv4 IP addresses? (Choose two.)


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If the primary root bridge experiences a power loss, which switch takes over?


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A network administrator is troubleshooting an EIGRP problem on a router and needs to confirm the IP addresses of the devices with which the router has established adjacency. The retransmit interval and the queue counts for the adjacent routers also need to be checked. What command will display the required information?


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What is the authoritative source for an address lookup?


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Which command can you enter to verify that a BGP connection to a remote device is established?


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Refer to the exhibit.

The two connected ports on the switch are not turning orange or green. Which three would be the most effective steps to troubleshoot this physical layer problem?

(Choose three.)


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During which phase of PPPoE is PPP authentication performed?


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Which three circumstances can cause a GRE tunnel to be in an up/down state? (Choose three.)


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Which three statements about IPv6 prefixes are true? (Choose three.)


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Which command can you enter to display duplicate IP addresses that the DHCP server assigns?


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Refer to the exhibit.

Which three ports will be STP designated ports if all the links are operating at the same bandwidth? (Choose three.)


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Which two statements about using leased lines for your WAN infrastructure are true? (Choose two.)


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Refer to the exhibit.

The network administrator cannot connect to Switch 1 over a Telnet session, although the hosts attached to Switch1 can ping the interface Fa0/0 of the router.

Given the information in the graphic and assuming that the router and Switch2 are configured properly, which of the following commands should be issued on

Switch1 to correct this problem?


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Which two statements about IPv6 and routing protocols are true? (Choose two.)


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Refer to the exhibit.

Each of these four switches has been configured with a hostname, as well as being configured to run RSTP. No other configuration changes have been made.

Which three of these show the correct RSTP port roles for the indicated switches and interfaces? (Choose three.)


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Which feature builds a FIB and an adjacency table to expedite packet forwarding?


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Which command can you enter to verify that a 128-bit address is live and responding?


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What will happen if a private IP address is assigned to a public interface connected to an ISP?


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DRAG DROP -

Refer to the exhibit.

Select and Place:


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What are two reasons that duplex mismatches can be difficult to diagnose? (Choose two.)


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Which condition indicates that service password-encryption is enabled?


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Which command would you configure globally on a Cisco router that would allow you to view directly connected Cisco devices?


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Which two statements about wireless LAN controllers are true? (Choose two.)


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Which two statements about northbound and southbound APIs are true? (Choose two.)


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Which command can you enter to set the default route for all traffic to an interface?


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Which step in the router boot process searches for an IOS image to load into the router?


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Which protocol advertises a virtual IP address to facilitate transparent failover of a Cisco routing device?


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You work as a network engineer for SASCOM Network Ltd company. On router HQ, a provider link has been enabled and you must configure an IPv6 default route on HQ and make sure that this route is advertised in IPv6 OSPF process. Also, you must troubleshoot another issue. The router HQ is not forming an IPv6

OSPF neighbor relationship with router BR.

Topology Details -

Two routers HQ and BR are connected via serial links.

Router HQ has interface Ethernet0/1 connected to the provider cloud and interface Ethernet0/0 connected to RA1.

Router BR has interface Ethernet0/0 connected to another router RA2.

IPv6 Routing Details -

All routers are running IPv6 OSPF routing with process ID number 100. Refer to the topology diagram for information about the OSPF areas. The Loopback 0 IPv4 access is the OSPF router ID on each router.

Configuration requirements -

-> Configure IPv6 default route on router HQ with default gateway as 2001:DB8:B:B1B2::1

-> Verify by pinging provider test IPv6 address 2001:DB8:0:1111::1 after configuring default route on HQ.

-> Make sure that the default route is advertised in IPv6 OSPF on router HQ. This default route should be advertised only when HQ has a default route in its routing table.

-> Router HQ is not forming IPv6 OSPF neighbor with BR. You must troubleshoot and resolve this issue.

To gain the maximum numbers of points, you must complete the necessary configurations and fix IPv6 OSPF neighbor issue with router BR. IPv6

Special Note:

OSPFv3 must be configured without using address families. Do not change the IPv6 OSPF process ID.

Refer to the topology below and answer the following question.

Why is the Branch2 network 10.1 0.20.0/24 unable to communicate with the Server farm1 network 10.1 0.10.0/24 over the GRE tunnel?


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Refer to the topology below and answer the following question.

Why has the Branch3 router lost connectivity with R1? Use only show commands to troubleshoot because usage of the debug command is restricted on the

Branch3 and R1 routers.


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Refer to the topology below and answer the following question.

Which statement about the router configurations is correct?


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Refer to the topology below and answer the following question.

Why did Branch1 router lose WAN connectivity with R1 router?


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If all switches are configured with default values, which switch will take over when the primary root bridge experiences a power loss?


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Instructions:

- Enter IOS commands on the device to verify network operation and answer the multiple questions.

- THIS TASK DOES NOT REQUIRE REVICE CINFIGURATION.

- Click the device icon to gain access to the console device. No console or enable passwords are required.

- To access the multiple choice questions, click the numbered boxes on the left of the top panel.

- there are four multiple-choice questions with this task. Be sure to answer all four questions before clicking Next.

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?


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Instructions:

- Enter IOS commands on the device to verify network operation and answer the multiple questions.

- THIS TASK DOES NOT REQUIRE REVICE CINFIGURATION.

- Click the device icon to gain access to the console device. No console or enable passwords are required.

- To access the multiple choice questions, click the numbered boxes on the left of the top panel.

- there are four multiple-choice questions with this task. Be sure to answer all four questions before clicking Next.

Users in the main office complain that they are unable to reach Internet sites. You observe that Internet traffic that is destined towards ISP router is not forwarded correctly on Router R1. What could be an issue?

Plug to the Internet server shows the following results from R1:

R1#ping 209.165.200.225 -

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 209.165.200.225, time out is 2 seconds.

Success rate is 0 percent (0/5)


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Instructions:

- Enter IOS commands on the device to verify network operation and answer the multiple questions.

- THIS TASK DOES NOT REQUIRE REVICE CINFIGURATION.

- Click the device icon to gain access to the console device. No console or enable passwords are required.

- To access the multiple choice questions, click the numbered boxes on the left of the top panel.

- there are four multiple-choice questions with this task. Be sure to answer all four questions before clicking Next.

Examine R2 configuration, the traffic that is destined to R3 LAN network sourced from Router R2 is forwarded to R1 instead R3. What could be an issue?

R2#traceroute 10.10.12.1 source 10.10.10.1

Type escape sequence to abort -

Tracing the route to 10.10.12.1 -

VRF info: (vrf in name/id, vrf out name/id)

1 172.16.14.1 0 msec 1 msec 0 msec

2 172.16.14.1 !H !H *

R2#


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You are a junior network engineer for a financial company, and the main office network is experiencing network issues. Troubleshoot the network issues.

Router R1 connects the main office to the Internet, and routers R2 and R3 are internal routers.

NAT is enabled on router R1.

The routing protocol that is enabled between routers R1, R2 and R3 is RIPv2.

R1 sends the default route into RIPv2 for the internal routers to forward Internet traffic to R1.

You have console access on R1, R2 and R3 devices. Use only show commands to troubleshoot the issues.

Why applications that are installed on PCs in R2 LAN network 10.100.20.0/24 are unable to communicate with server1?


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You are a junior network engineer for a financial company, and the main office network is experiencing network issues. Troubleshoot the network issues.

Router R1 connects the main office to the Internet, and routers R2 and R3 are internal routers.

NAT is enabled on router R1.

The routing protocol that is enabled between routers R1, R2 and R3 is RIPv2.

R1 sends the default route into RIPv2 for the internal routers to forward Internet traffic to R1.

You have console access on R1, R2 and R3 devices. Use only show commands to troubleshoot the issues.

Users complain that they are unable to reach Internet sites. You are troubleshooting Internet connectivity problem at main office. Which statement correctly identifies the problem on Router R1?


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Refer to the exhibit. If R1 sends traffic to 192.168.10.45, the traffic is sent through which interface?


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Refer to the exhibit. Which command can you enter to verify link speed and duplex setting on the interface?


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To enable router on a stick on a router subinterface, which two steps must you perform? (Choose two.)


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Which command can you use to test whether a switch supports secure connections and strong authentication?


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Which utility can you use to determine whether a switch can send echo requests and replies?


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Which two protocols can detect native VLAN mismatch errors? (Choose two.)


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Refer to the exhibit. If computer A is sending traffic to computer B, which option is the source IP address when a packet leaves R1 on interface F0/1?


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Which functionality does split horizon provide?


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Which command can you enter to block HTTPS traffic from the whole Class A private network range to a host?


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Which MAC protocol sets a random timer to reattempt communication?


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How many host addresses are available on the network 192.168.1.0 subnet 255.255.255 240?


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Which command can you enter in global configuration mode to create a DHCP address pool?


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Which two statements about unique local IPv6 addresses are true? (Choose two.)


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While viewing the running configuration of a router, you observe the command logging trap warning. Which syslog messages will the router send?


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Which statement about SNMPv2 is true?


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Which DTP switch port mode allows the port to create a trunk link if the neighboring port is in trunk mode, dynamic desirable mode, or desirable auto mode?


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Which feature is configured by setting a variance that is at least two times the metric?


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Which VTP mode prevents you from making changes to VLANs?


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Which value indicates the distance from the NTP authoritative time source?


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Which two statements about floating static routes are true? (Choose two.)


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If three devices are plugged into one port on a switch and two devices are plugged into a different port, how many collision domains are on the switch?


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Which two options are valid numbers for a standard access list? (Choose two.)


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Refer to the exhibit. If RTR01 is configured as shown, which three addresses will be received by other routers that are running EIGRP on the network?


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Refer to the exhibit. After you apply the given configuration to a router, the DHCP clients behind the device cannot communicate with hosts outside of their subnet.

Which action is most likely to correct the problem?


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Refer to the exhibit. Which command do you enter so that R1 advertises the Loopback0 interface to the BGP peers?


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Which three statements about DTP are true? (Choose three.)


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Which definition of a host route is true?


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DRAG DROP -

Drag the cable type on the left to the purpose for which is the best suited on the right. Not all options are used.

Select and Place:


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Which statement about DHCP snooping is true?


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DRAG DROP -

Drag the IPv6 multicast address type on the left to their purpose on the right.

Select and Place:


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Which two statements about the extended traceroute command are true? (Choose two.)


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Refer to the exhibit. You have determined that computer A cannot ping computer B. Which reason for the problem is most likely true?


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Which three commands must you enter to create a trunk that allows VLAN 20? (Choose three.)


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How does a router handle an incoming packet whose destination network is missing from the routing table?


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Which two statements about Ethernet standards are true? (Choose two.)


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If you configure syslog messages without specifying the logging trap level, which log messages will the router send?


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Which feature facilitates the tagging of frames on a specific VLAN?


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Which statement about spanning-tree root-bridge election is true?


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Which two steps must you perform to enable router-on-a-stick on a switch? (Choose two.)


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Which type of routing protocol operates by using first-hand information from each device's peers?


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On which type of port can switches interconnect for multi-VLAN communication?


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Refer to the exhibit. What is the metric for the route from R1 to 192.168.10.1?


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